cascardo/linux.git
8 years agomd: fix bug due to nested suspend
Mikulas Patocka [Fri, 18 Dec 2015 04:19:16 +0000 (15:19 +1100)]
md: fix bug due to nested suspend

The patch c7bfced9a6716ff66c9d61f934bb60af08d4688c committed to 4.4-rc
causes crash in LVM test shell/lvchange-raid.sh. The kernel crashes with
this BUG, the reason is that we attempt to suspend a device that is
already suspended. See also
https://bugzilla.redhat.com/show_bug.cgi?id=1283491

This patch fixes the bug by changing functions mddev_suspend and
mddev_resume to always nest.
The number of nested calls to mddev_nested_suspend is kept in the
variable mddev->suspended.
[neilb: made mddev_suspend() always nest instead of introduce mddev_nested_suspend]

kernel BUG at drivers/md/md.c:317!
CPU: 3 PID: 32754 Comm: lvm Not tainted 4.4.0-rc2 #1
task: 0000000047076040 ti: 0000000047014000 task.ti: 0000000047014000

     YZrvWESTHLNXBCVMcbcbcbcbOGFRQPDI
PSW: 00001000000001000000000000001111 Not tainted
r00-03  000000000804000f 00000000102c5280 0000000010c7522c 000000007e3d1810
r04-07  0000000010c6f000 000000004ef37f20 000000007e3d1dd0 000000007e3d1810
r08-11  000000007c9f1600 0000000000000000 0000000000000001 ffffffffffffffff
r12-15  0000000010c1d000 0000000000000041 00000000f98d63c8 00000000f98e49e4
r16-19  00000000f98e49e4 00000000c138fd06 00000000f98d63c8 0000000000000001
r20-23  0000000000000002 000000004ef37f00 00000000000000b0 00000000000001d1
r24-27  00000000424783a0 000000007e3d1dd0 000000007e3d1810 00000000102b2000
r28-31  0000000000000001 0000000047014840 0000000047014930 0000000000000001
sr00-03  0000000007040800 0000000000000000 0000000000000000 0000000007040800
sr04-07  0000000000000000 0000000000000000 0000000000000000 0000000000000000

IASQ: 0000000000000000 0000000000000000 IAOQ: 00000000102c538c 00000000102c5390
 IIR: 03ffe01f    ISR: 0000000000000000  IOR: 00000000102b2748
 CPU:        3   CR30: 0000000047014000 CR31: 0000000000000000
 ORIG_R28: 00000000000000b0
 IAOQ[0]: mddev_suspend+0x10c/0x160 [md_mod]
 IAOQ[1]: mddev_suspend+0x110/0x160 [md_mod]
 RP(r2): raid1_add_disk+0xd4/0x2c0 [raid1]
Backtrace:
 [<0000000010c7522c>] raid1_add_disk+0xd4/0x2c0 [raid1]
 [<0000000010c20078>] raid_resume+0x390/0x418 [dm_raid]
 [<00000000105833e8>] dm_table_resume_targets+0xc0/0x188 [dm_mod]
 [<000000001057f784>] dm_resume+0x144/0x1e0 [dm_mod]
 [<0000000010587dd4>] dev_suspend+0x1e4/0x568 [dm_mod]
 [<0000000010589278>] ctl_ioctl+0x1e8/0x428 [dm_mod]
 [<0000000010589518>] dm_compat_ctl_ioctl+0x18/0x68 [dm_mod]
 [<0000000040377b88>] compat_SyS_ioctl+0xd0/0x1558

Fixes: c7bfced9a671 ("md: suspend i/o during runtime blk_integrity_unregister")
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: NeilBrown <neilb@suse.com>
8 years agoMD: change journal disk role to disk 0
Shaohua Li [Fri, 18 Dec 2015 04:19:16 +0000 (15:19 +1100)]
MD: change journal disk role to disk 0

Neil pointed out setting journal disk role to raid_disks will confuse
reshape if we support reshape eventually. Switching the role to 0 (we
should be fine as long as the value >=0) and skip sysfs file creation to
avoid error.

Signed-off-by: Shaohua Li <shli@fb.com>
Signed-off-by: NeilBrown <neilb@suse.com>
8 years agomd/raid10: fix data corruption and crash during resync
Artur Paszkiewicz [Fri, 18 Dec 2015 04:19:16 +0000 (15:19 +1100)]
md/raid10: fix data corruption and crash during resync

The commit c31df25f20e3 ("md/raid10: make sync_request_write() call
bio_copy_data()") replaced manual data copying with bio_copy_data() but
it doesn't work as intended. The source bio (fbio) is already processed,
so its bvec_iter has bi_size == 0 and bi_idx == bi_vcnt.  Because of
this, bio_copy_data() either does not copy anything, or worse, copies
data from the ->bi_next bio if it is set.  This causes wrong data to be
written to drives during resync and sometimes lockups/crashes in
bio_copy_data():

[  517.338478] NMI watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [md126_raid10:3319]
[  517.347324] Modules linked in: raid10 xt_CHECKSUM ipt_MASQUERADE nf_nat_masquerade_ipv4 tun ip6t_rpfilter ip6t_REJECT nf_reject_ipv6 ipt_REJECT nf_reject_ipv4 xt_conntrack ebtable_nat ebtable_broute bridge stp llc ebtable_filter ebtables ip6table_nat nf_conntrack_ipv6 nf_defrag_ipv6 nf_nat_ipv6 ip6table_mangle ip6table_security ip6table_raw ip6table_filter ip6_tables iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 nf_nat nf_conntrack iptable_mangle iptable_security iptable_raw iptable_filter ip_tables x86_pkg_temp_thermal coretemp kvm_intel kvm crct10dif_pclmul crc32_pclmul cryptd shpchp pcspkr ipmi_si ipmi_msghandler tpm_crb acpi_power_meter acpi_cpufreq ext4 mbcache jbd2 sr_mod cdrom sd_mod e1000e ax88179_178a usbnet mii ahci ata_generic crc32c_intel libahci ptp pata_acpi libata pps_core wmi sunrpc dm_mirror dm_region_hash dm_log dm_mod
[  517.440555] CPU: 0 PID: 3319 Comm: md126_raid10 Not tainted 4.3.0-rc6+ #1
[  517.448384] Hardware name: Intel Corporation PURLEY/PURLEY, BIOS PLYDCRB1.86B.0055.D14.1509221924 09/22/2015
[  517.459768] task: ffff880153773980 ti: ffff880150df8000 task.ti: ffff880150df8000
[  517.468529] RIP: 0010:[<ffffffff812e1888>]  [<ffffffff812e1888>] bio_copy_data+0xc8/0x3c0
[  517.478164] RSP: 0018:ffff880150dfbc98  EFLAGS: 00000246
[  517.484341] RAX: ffff880169356688 RBX: 0000000000001000 RCX: 0000000000000000
[  517.492558] RDX: 0000000000000000 RSI: ffffea0001ac2980 RDI: ffffea0000d835c0
[  517.500773] RBP: ffff880150dfbd08 R08: 0000000000000001 R09: ffff880153773980
[  517.508987] R10: ffff880169356600 R11: 0000000000001000 R12: 0000000000010000
[  517.517199] R13: 000000000000e000 R14: 0000000000000000 R15: 0000000000001000
[  517.525412] FS:  0000000000000000(0000) GS:ffff880174a00000(0000) knlGS:0000000000000000
[  517.534844] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  517.541507] CR2: 00007f8a044d5fed CR3: 0000000169504000 CR4: 00000000001406f0
[  517.549722] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  517.557929] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  517.566144] Stack:
[  517.568626]  ffff880174a16bc0 ffff880153773980 ffff880169356600 0000000000000000
[  517.577659]  0000000000000001 0000000000000001 ffff880153773980 ffff88016a61a800
[  517.586715]  ffff880150dfbcf8 0000000000000001 ffff88016dd209e0 0000000000001000
[  517.595773] Call Trace:
[  517.598747]  [<ffffffffa043ef95>] raid10d+0xfc5/0x1690 [raid10]
[  517.605610]  [<ffffffff816697ae>] ? __schedule+0x29e/0x8e2
[  517.611987]  [<ffffffff814ff206>] md_thread+0x106/0x140
[  517.618072]  [<ffffffff810c1d80>] ? wait_woken+0x80/0x80
[  517.624252]  [<ffffffff814ff100>] ? super_1_load+0x520/0x520
[  517.630817]  [<ffffffff8109ef89>] kthread+0xc9/0xe0
[  517.636506]  [<ffffffff8109eec0>] ? flush_kthread_worker+0x70/0x70
[  517.643653]  [<ffffffff8166d99f>] ret_from_fork+0x3f/0x70
[  517.649929]  [<ffffffff8109eec0>] ? flush_kthread_worker+0x70/0x70

Signed-off-by: Artur Paszkiewicz <artur.paszkiewicz@intel.com>
Reviewed-by: Shaohua Li <shli@kernel.org>
Cc: stable@vger.kernel.org (v4.2+)
Fixes: c31df25f20e3 ("md/raid10: make sync_request_write() call bio_copy_data()")
Signed-off-by: NeilBrown <neilb@suse.com>
8 years agodrm/nouveau/bios/fan: hardcode the fan mode to linear
Martin Peres [Sun, 29 Nov 2015 14:10:18 +0000 (16:10 +0200)]
drm/nouveau/bios/fan: hardcode the fan mode to linear

This is an oversight that made use of the trip-point-based fan managenent on
cards that never expose those. This led the fan to stay at fan_min.

Fortunately, the emergency code would kick when the temperature would reach
90°C.

Reported-by: Tom Englund <tomenglund26@gmail.com>
Tested-by: Tom Englund <tomenglund26@gmail.com>
Signed-off-by: Martin Peres <martin.peres@free.fr>
Tested-by: Daemon32 <lnf.purple@gmail.com>
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=92126
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
Cc: stable@vger.kernel.org
8 years agoMerge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Linus Torvalds [Thu, 17 Dec 2015 22:05:22 +0000 (14:05 -0800)]
Merge git://git./linux/kernel/git/davem/net

Pull networking fixes from David Miller:

 1) Fix uninitialized variable warnings in nfnetlink_queue, a lot of
    people reported this...  From Arnd Bergmann.

 2) Don't init mutex twice in i40e driver, from Jesse Brandeburg.

 3) Fix spurious EBUSY in rhashtable, from Herbert Xu.

 4) Missing DMA unmaps in mvpp2 driver, from Marcin Wojtas.

 5) Fix race with work structure access in pppoe driver causing
    corruptions, from Guillaume Nault.

 6) Fix OOPS due to sh_eth_rx() not checking whether netdev_alloc_skb()
    actually succeeded or not, from Sergei Shtylyov.

 7) Don't lose flags when settifn IFA_F_OPTIMISTIC in ipv6 code, from
    Bjørn Mork.

 8) VXLAN_HD_RCO defined incorrectly, fix from Jiri Benc.

 9) Fix clock source used for cookies in SCTP, from Marcelo Ricardo
    Leitner.

10) aurora driver needs HAS_DMA dependency, from Geert Uytterhoeven.

11) ndo_fill_metadata_dst op of vxlan has to handle ipv6 tunneling
    properly as well, from Jiri Benc.

12) Handle request sockets properly in xfrm layer, from Eric Dumazet.

13) Double stats update in ipv6 geneve transmit path, fix from Pravin B
    Shelar.

14) sk->sk_policy[] needs RCU protection, and as a result
    xfrm_policy_destroy() needs to free policies using an RCU grace
    period, from Eric Dumazet.

15) SCTP needs to clone ipv6 tx options in order to avoid use after
    free, from Eric Dumazet.

16) Missing kbuild export if ila.h, from Stephen Hemminger.

17) Missing mdiobus_alloc() return value checking in mdio-mux.c, from
    Tobias Klauser.

18) Validate protocol value range in ->create() methods, from Hannes
    Frederic Sowa.

19) Fix early socket demux races that result in illegal dst reuse, from
    Eric Dumazet.

20) Validate socket address length in pptp code, from WANG Cong.

21) skb_reorder_vlan_header() uses incorrect offset and can corrupt
    packets, from Vlad Yasevich.

22) Fix memory leaks in nl80211 registry code, from Ola Olsson.

23) Timeout loop count handing fixes in mISDN, xgbe, qlge, sfc, and
    qlcnic.  From Dan Carpenter.

24) msg.msg_iocb needs to be cleared in recvfrom() otherwise, for
    example, AF_ALG will interpret it as an async call.  From Tadeusz
    Struk.

25) inetpeer_set_addr_v4 forgets to initialize the 'vif' field, from
    Eric Dumazet.

26) rhashtable enforces the minimum table size not early enough,
    breaking how we calculate the per-cpu lock allocations.  From
    Herbert Xu.

27) Fix FCC port lockup in 82xx driver, from Martin Roth.

28) FOU sockets need to be freed using RCU, from Hannes Frederic Sowa.

29) Fix out-of-bounds access in __skb_complete_tx_timestamp() and
    sock_setsockopt() wrt.  timestamp handling.  From WANG Cong.

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (117 commits)
  net: check both type and procotol for tcp sockets
  drivers: net: xgene: fix Tx flow control
  tcp: restore fastopen with no data in SYN packet
  af_unix: Revert 'lock_interruptible' in stream receive code
  fou: clean up socket with kfree_rcu
  82xx: FCC: Fixing a bug causing to FCC port lock-up
  gianfar: Don't enable RX Filer if not supported
  net: fix warnings in 'make htmldocs' by moving macro definition out of field declaration
  rhashtable: Fix walker list corruption
  rhashtable: Enforce minimum size on initial hash table
  inet: tcp: fix inetpeer_set_addr_v4()
  ipv6: automatically enable stable privacy mode if stable_secret set
  net: fix uninitialized variable issue
  bluetooth: Validate socket address length in sco_sock_bind().
  net_sched: make qdisc_tree_decrease_qlen() work for non mq
  ser_gigaset: remove unnecessary kfree() calls from release method
  ser_gigaset: fix deallocation of platform device structure
  ser_gigaset: turn nonsense checks into WARN_ON
  ser_gigaset: fix up NULL checks
  qlcnic: fix a timeout loop
  ...

8 years agonet: check both type and procotol for tcp sockets
WANG Cong [Thu, 17 Dec 2015 07:39:04 +0000 (23:39 -0800)]
net: check both type and procotol for tcp sockets

Dmitry reported the following out-of-bound access:

Call Trace:
 [<ffffffff816cec2e>] __asan_report_load4_noabort+0x3e/0x40
mm/kasan/report.c:294
 [<ffffffff84affb14>] sock_setsockopt+0x1284/0x13d0 net/core/sock.c:880
 [<     inline     >] SYSC_setsockopt net/socket.c:1746
 [<ffffffff84aed7ee>] SyS_setsockopt+0x1fe/0x240 net/socket.c:1729
 [<ffffffff85c18c76>] entry_SYSCALL_64_fastpath+0x16/0x7a
arch/x86/entry/entry_64.S:185

This is because we mistake a raw socket as a tcp socket.
We should check both sk->sk_type and sk->sk_protocol to ensure
it is a tcp socket.

Willem points out __skb_complete_tx_timestamp() needs to fix as well.

Reported-by: Dmitry Vyukov <dvyukov@google.com>
Cc: Willem de Bruijn <willemdebruijn.kernel@gmail.com>
Cc: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Acked-by: Willem de Bruijn <willemb@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agodrivers: net: xgene: fix Tx flow control
Iyappan Subramanian [Thu, 17 Dec 2015 06:26:05 +0000 (22:26 -0800)]
drivers: net: xgene: fix Tx flow control

Currently the Tx flow control is based on reading the hardware state,
which is not accurate since it may not reflect the descriptors that
are not yet reached the memory.

To accurately control the Tx flow, changing it to be software based.

Signed-off-by: Iyappan Subramanian <isubramanian@apm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agotcp: restore fastopen with no data in SYN packet
Eric Dumazet [Wed, 16 Dec 2015 21:53:10 +0000 (13:53 -0800)]
tcp: restore fastopen with no data in SYN packet

Yuchung tracked a regression caused by commit 57be5bdad759 ("ip: convert
tcp_sendmsg() to iov_iter primitives") for TCP Fast Open.

Some Fast Open users do not actually add any data in the SYN packet.

Fixes: 57be5bdad759 ("ip: convert tcp_sendmsg() to iov_iter primitives")
Reported-by: Yuchung Cheng <ycheng@google.com>
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Acked-by: Yuchung Cheng <ycheng@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoaf_unix: Revert 'lock_interruptible' in stream receive code
Rainer Weikusat [Wed, 16 Dec 2015 20:09:25 +0000 (20:09 +0000)]
af_unix: Revert 'lock_interruptible' in stream receive code

With b3ca9b02b00704053a38bfe4c31dbbb9c13595d0, the AF_UNIX SOCK_STREAM
receive code was changed from using mutex_lock(&u->readlock) to
mutex_lock_interruptible(&u->readlock) to prevent signals from being
delayed for an indefinite time if a thread sleeping on the mutex
happened to be selected for handling the signal. But this was never a
problem with the stream receive code (as opposed to its datagram
counterpart) as that never went to sleep waiting for new messages with the
mutex held and thus, wouldn't cause secondary readers to block on the
mutex waiting for the sleeping primary reader. As the interruptible
locking makes the code more complicated in exchange for no benefit,
change it back to using mutex_lock.

Signed-off-by: Rainer Weikusat <rweikusat@mobileactivedefense.com>
Acked-by: Hannes Frederic Sowa <hannes@stressinduktion.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoMerge branch 'drm-fixes' of git://people.freedesktop.org/~airlied/linux
Linus Torvalds [Thu, 17 Dec 2015 19:55:29 +0000 (11:55 -0800)]
Merge branch 'drm-fixes' of git://people.freedesktop.org/~airlied/linux

Pull drm fixes from Dave Airlie:
 "Some i915 fixes, one omap fix, one core regression fix.

  Not even enough fixes for a twelve days of xmas song, which seemms
  good"

* 'drm-fixes' of git://people.freedesktop.org/~airlied/linux:
  drm: Don't overwrite UNVERFIED mode status to OK
  drm/omap: fix fbdev pix format to support all platforms
  drm/i915: Do a better job at disabling primary plane in the noatomic case.
  drm/i915/skl: Double RC6 WRL always on
  drm/i915/skl: Disable coarse power gating up until F0
  drm/i915: Remove incorrect warning in context cleanup

8 years agolocking/osq: Fix ordering of node initialisation in osq_lock
Will Deacon [Fri, 11 Dec 2015 17:46:41 +0000 (17:46 +0000)]
locking/osq: Fix ordering of node initialisation in osq_lock

The Cavium guys reported a soft lockup on their arm64 machine, caused by
commit c55a6ffa6285 ("locking/osq: Relax atomic semantics"):

    mutex_optimistic_spin+0x9c/0x1d0
    __mutex_lock_slowpath+0x44/0x158
    mutex_lock+0x54/0x58
    kernfs_iop_permission+0x38/0x70
    __inode_permission+0x88/0xd8
    inode_permission+0x30/0x6c
    link_path_walk+0x68/0x4d4
    path_openat+0xb4/0x2bc
    do_filp_open+0x74/0xd0
    do_sys_open+0x14c/0x228
    SyS_openat+0x3c/0x48
    el0_svc_naked+0x24/0x28

This is because in osq_lock we initialise the node for the current CPU:

    node->locked = 0;
    node->next = NULL;
    node->cpu = curr;

and then publish the current CPU in the lock tail:

    old = atomic_xchg_acquire(&lock->tail, curr);

Once the update to lock->tail is visible to another CPU, the node is
then live and can be both read and updated by concurrent lockers.

Unfortunately, the ACQUIRE semantics of the xchg operation mean that
there is no guarantee the contents of the node will be visible before
lock tail is updated.  This can lead to lock corruption when, for
example, a concurrent locker races to set the next field.

Fixes: c55a6ffa6285 ("locking/osq: Relax atomic semantics"):
Reported-by: David Daney <ddaney@caviumnetworks.com>
Reported-by: Andrew Pinski <andrew.pinski@caviumnetworks.com>
Tested-by: Andrew Pinski <andrew.pinski@caviumnetworks.com>
Acked-by: Davidlohr Bueso <dave@stgolabs.net>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1449856001-21177-1-git-send-email-will.deacon@arm.com
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
8 years agoMerge branch 'libnvdimm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdim...
Linus Torvalds [Thu, 17 Dec 2015 19:20:13 +0000 (11:20 -0800)]
Merge branch 'libnvdimm-fixes' of git://git./linux/kernel/git/nvdimm/nvdimm

Pull libnvdimm fixes from Dan Williams:

 - Two bug fixes for misuse of PAGE_MASK in scatterlist and dma-debug.
   These are tagged for -stable.  The scatterlist impact is potentially
  corrupted dma addresses on HIGHMEM enabled platforms.

 - A minor locking fix for the NFIT hot-add implementation that is new
   in 4.4-rc.  This would only trigger in the case a hot-add raced
   driver removal.

* 'libnvdimm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm:
  dma-debug: Fix dma_debug_entry offset calculation
  Revert "scatterlist: use sg_phys()"
  nfit: acpi_nfit_notify(): Do not leave device locked

8 years agoMerge remote-tracking branch 'mkp-scsi/4.4/scsi-fixes' into fixes
James Bottomley [Thu, 17 Dec 2015 15:32:08 +0000 (07:32 -0800)]
Merge remote-tracking branch 'mkp-scsi/4.4/scsi-fixes' into fixes

8 years agogpio: revert get() to non-errorprogating behaviour
Linus Walleij [Thu, 17 Dec 2015 09:14:24 +0000 (10:14 +0100)]
gpio: revert get() to non-errorprogating behaviour

commit e20538b82f1f
("gpio: Propagate errors from chip->get()")
started to propagate errors from the .get() functions since
we can get errors from the infrastructure of e.g. slowbus
GPIO expanders.

However it turns out a bunch of drivers relied on the core
to clamp the value, so we need to revert to the old behaviour
and go over all drivers and fix them to conform to the
expectations of the core before we go back to propagating
the error code.

Cc: stable@vger.kernel.org # 4.3+
Cc: Bjorn Andersson <bjorn.andersson@sonymobile.com>
Cc: Vladimir Zapolskiy <vladimir_zapolskiy@mentor.com>
Fixes: e20538b82f1f ("gpio: Propagate errors from chip->get()")
Reported-by: Michael Trimarchi <michael@amarulasolutions.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
8 years agogpio: generic: clamp values from bgpio_get_set()
Linus Walleij [Thu, 10 Dec 2015 14:55:29 +0000 (15:55 +0100)]
gpio: generic: clamp values from bgpio_get_set()

The bgpio_get_set() call should return a value clamped to [0,1],
the current code will return a negative value if reading
bit 31, which turns the value negative as this is a signed value
and thus gets interpreted as an error by the gpiolib core.
Found on the gpio-mxc but applies to any MMIO driver.

Cc: stable@vger.kernel.org # 4.3+
Cc: kernel@pengutronix.de
Cc: Vladimir Zapolskiy <vladimir_zapolskiy@mentor.com>
Fixes:  e20538b82f1f ("gpio: Propagate errors from chip->get()")
Reported-by: Clemens Gruber <clemens.gruber@pqgruber.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
8 years agoASoC: sgtl5000: fix VAG power up timing
Jean-Michel Hautbois [Thu, 17 Dec 2015 10:07:23 +0000 (11:07 +0100)]
ASoC: sgtl5000: fix VAG power up timing

When power up, a "pop" is heard on line-in and mic-in.
An analysis of the PCM shows it lasts ~400ms
and looks like a filter response.
VAG power up should be delayed by 400ms as VAG power down is.

Signed-off-by: Jean-Michel Hautbois <jean-michel.hautbois@veo-labs.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
8 years agopowerpc/powernv: pr_warn_once on unsupported OPAL_MSG type
Stewart Smith [Fri, 11 Dec 2015 01:08:23 +0000 (12:08 +1100)]
powerpc/powernv: pr_warn_once on unsupported OPAL_MSG type

When running on newer OPAL firmware that supports sending extra
OPAL_MSG types, we would print a warning on *every* message received.

This could be a problem for kernels that don't support OPAL_MSG_OCC
on machines that are running real close to thermal limits and the
OCC is throttling the chip. For a kernel that is paying attention to
the message queue, we could get these notifications quite often.

Conceivably, future message types could also come fairly often,
and printing that we didn't understand them 10,000 times provides
no further information than printing them once.

Cc: stable@vger.kernel.org
Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
8 years agovirtio/s390: handle error values in irb
Cornelia Huck [Thu, 3 Dec 2015 16:24:00 +0000 (17:24 +0100)]
virtio/s390: handle error values in irb

The common I/O layer may pass an error value as the irb in the device's
interrupt handler (for classic channel I/O). This won't happen in
current virtio-ccw implementations, but it's better to be safe than
sorry.

Let's just return the error conveyed by the irb and clear any possible
pending I/O indications.

Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Reviewed-by: Guenther Hutzl <hutzl@linux.vnet.ibm.com>
Reviewed-by: Pierre Morel <pmorel@linux.vnet.ibm.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
8 years agoARC: smp: Rename platform hook @init_cpu_smp -> @init_per_cpu
Vineet Gupta [Thu, 17 Dec 2015 06:52:21 +0000 (12:22 +0530)]
ARC: smp: Rename platform hook @init_cpu_smp -> @init_per_cpu

Makes it similar to smp_ops which also has callback with same name

Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
8 years agoARC: rename smp operation init_irq_cpu() to init_per_cpu()
Noam Camus [Wed, 16 Dec 2015 01:10:27 +0000 (03:10 +0200)]
ARC: rename smp operation init_irq_cpu() to init_per_cpu()

This will better reflect its description i.e. "any needed setup..."
and not just do an "IPI request".

Signed-off-by: Noam Camus <noamc@ezchip.com>
Acked-by: Vineet Gupta <vgupta@synopsys.com>
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
8 years agoARC: dw2 unwind: Ignore CIE version !=1 gracefully instead of bailing
Vineet Gupta [Wed, 16 Dec 2015 11:47:00 +0000 (17:17 +0530)]
ARC: dw2 unwind: Ignore CIE version !=1 gracefully instead of bailing

ARC dwarf unwinder only supports CIE version == 1
The boot time dwarf sanitizer (part of binary lookup table constructor)
would simply bail if it saw CIE version == 3, rendering unwinder with a
NULL lookup table.

It seems libgcc linked with kernel does have such entries.

With fallback linear search removed, and a NULL binary lookup table,
unwinder fails to generate any stack trace.

So allow graceful ignoring of unsupported CIE entries.

This problem was initially seen in Alexey's setup (and not mine) as he
was using buildroot built toolchain (libgcc) which doesn't get built with
CFLAGS_FOR_TARGET="-gdwarf-2 which is my default

Fixes STAR 9000985048: "kernel unwinder broken with stock tools"

Fixes: 2e22502c080f ARC: dw2 unwind: Remove falllback linear search thru FDE entries
Reported-by Alexey Brodkin <abrodkin@synopsys.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
8 years agoARC: dw2 unwind: Reinstante unwinding out of modules
Vineet Gupta [Fri, 11 Dec 2015 12:34:22 +0000 (18:04 +0530)]
ARC: dw2 unwind: Reinstante unwinding out of modules

The fix which removed linear searching of dwarf (because binary lookup
data always exists) missed out on the fact that modules don't get the
binary lookup tables info. This caused unwinding out of modules to stop
working.

So add binary lookup header setup (equivalent of eh_frame_hdr setup) to
modules as well.

While at it, confine the header setup to within unwinder code,
reducing one API exposed out of unwinder code.

Fixes: 2e22502c080f ARC: dw2 unwind: Remove falllback linear search thru FDE entries
Cc: <stable@vger.kernel.org>
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
8 years agoARC: [plat-sim] unbork non default CONFIG_LINUX_LINK_BASE
Vineet Gupta [Tue, 15 Dec 2015 08:27:16 +0000 (13:57 +0530)]
ARC: [plat-sim] unbork non default CONFIG_LINUX_LINK_BASE

HIGHMEM support bumped the default memory size for nsim platform to 1G.
Thus total memory ended at the very edge of start of peripherals address
space. With linux link base shifted, memory started bleeding into
peripheral space which caused early boot bad_page spew !

Fixes: 29e332261d2 ("ARC: mm: HIGHMEM: populate high memory from DT")
Reported-by: Anton Kolesov <akolesov@synopsys.com>
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
8 years agofou: clean up socket with kfree_rcu
Hannes Frederic Sowa [Tue, 15 Dec 2015 20:01:53 +0000 (21:01 +0100)]
fou: clean up socket with kfree_rcu

fou->udp_offloads is managed by RCU. As it is actually included inside
the fou sockets, we cannot let the memory go out of scope before a grace
period. We either can synchronize_rcu or switch over to kfree_rcu to
manage the sockets. kfree_rcu seems appropriate as it is used by vxlan
and geneve.

Fixes: 23461551c00628c ("fou: Support for foo-over-udp RX path")
Cc: Tom Herbert <tom@herbertland.com>
Signed-off-by: Hannes Frederic Sowa <hannes@stressinduktion.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoMerge tag 'mac80211-for-davem-2015-12-15' of git://git.kernel.org/pub/scm/linux/kerne...
David S. Miller [Wed, 16 Dec 2015 23:33:38 +0000 (18:33 -0500)]
Merge tag 'mac80211-for-davem-2015-12-15' of git://git./linux/kernel/git/jberg/mac80211

Johannes Berg says:

====================
Another set of fixes:
 * memory leak fixes (from Ola)
 * operating mode notification spec compliance fix (from Eyal)
 * copy rfkill names in case pointer becomes invalid (myself)
 * two hardware restart fixes (myself)
 * get rid of "limiting TX power" log spam (myself)
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
8 years ago82xx: FCC: Fixing a bug causing to FCC port lock-up
Martin Roth [Tue, 15 Dec 2015 02:17:53 +0000 (04:17 +0200)]
82xx: FCC: Fixing a bug causing to FCC port lock-up

The patch fixes FCC port lock-up, which occurs as a result of a bug
during underrun/collision handling. Within the tx_startup() function
in mac-fcc.c, the address of last BD is not calculated correctly.
As a result of wrong calculation of the last BD address, the next
transmitted BD may be set to an area out of the transmit BD ring.
This actually causes to port lock-up and it is not recoverable.

Signed-off-by: Martin Roth <martin.roth@motorolasolutions.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agogianfar: Don't enable RX Filer if not supported
Hamish Martin [Tue, 15 Dec 2015 01:14:50 +0000 (14:14 +1300)]
gianfar: Don't enable RX Filer if not supported

After commit 15bf176db1fb ("gianfar: Don't enable the Filer w/o the
Parser"), 'TSEC' model controllers (for example as seen on MPC8541E)
always have 8 bytes stripped from the front of received frames.
Only 'eTSEC' gianfar controllers have the RX Filer capability (amongst
other enhancements). Previously this was treated as always enabled
for both 'TSEC' and 'eTSEC' controllers.
In commit 15bf176db1fb ("gianfar: Don't enable the Filer w/o the Parser")
a subtle change was made to the setting of 'uses_rxfcb' to effectively
always set it (since 'rx_filer_enable' was always true). This had the
side-effect of always stripping 8 bytes from the front of received frames
on 'TSEC' type controllers.

We now only enable the RX Filer capability on controller types that
support it, thereby avoiding the issue for 'TSEC' type controllers.

Reviewed-by: Chris Packham <chris.packham@alliedtelesis.co.nz>
Reviewed-by: Mark Tomlinson <mark.tomlinson@alliedtelesis.co.nz>
Signed-off-by: Hamish Martin <hamish.martin@alliedtelesis.co.nz>
Reviewed-by: Claudiu Manoil <claudiu.manoil@freescale.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agodrm/amdgpu: fix user fence handling
Christian König [Mon, 14 Dec 2015 15:42:31 +0000 (16:42 +0100)]
drm/amdgpu: fix user fence handling

This fixes a random corruption under memory pressure. We need to fence
the BO for the user fence as well, otherwise it might be swapped out
and the GPU could write the fence value to an undesired location.

Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
8 years agodma-debug: Fix dma_debug_entry offset calculation
Daniel Mentz [Wed, 16 Dec 2015 01:38:48 +0000 (17:38 -0800)]
dma-debug: Fix dma_debug_entry offset calculation

dma-debug uses struct dma_debug_entry to keep track of dma coherent
memory allocation requests. The virtual address is converted into a pfn
and an offset. Previously, the offset was calculated using an incorrect
bit mask.  As a result, we saw incorrect error messages from dma-debug
like the following:

"DMA-API: exceeded 7 overlapping mappings of cacheline 0x03e00000"

Cacheline 0x03e00000 does not exist on our platform.

Cc: <stable@vger.kernel.org>
Fixes: 0abdd7a81b7e ("dma-debug: introduce debug_dma_assert_idle()")
Signed-off-by: Daniel Mentz <danielmentz@google.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
8 years agoMerge branch 'fixes' of git://ftp.arm.linux.org.uk/~rmk/linux-arm
Linus Torvalds [Wed, 16 Dec 2015 18:57:24 +0000 (10:57 -0800)]
Merge branch 'fixes' of git://ftp.arm.linux.org.uk/~rmk/linux-arm

Pull ARM fixes from Russell King:
 "Further ARM fixes:
   - Anson Huang noticed that we were corrupting a register we shouldn't
     be during suspend on some CPUs.
   - Shengjiu Wang spotted a bug in the 'swp' instruction emulation.
   - Will Deacon fixed a bug in the ASID allocator.
   - Laura Abbott fixed the kernel permission protection to apply to all
     threads running in the system.
   - I've fixed two bugs with the domain access control register
     handling, one to do with printing an appropriate value at oops
     time, and the other to further fix the uaccess_with_memcpy code"

* 'fixes' of git://ftp.arm.linux.org.uk/~rmk/linux-arm:
  ARM: 8475/1: SWP emulation: Restore original *data when failed
  ARM: 8471/1: need to save/restore arm register(r11) when it is corrupted
  ARM: fix uaccess_with_memcpy() with SW_DOMAIN_PAN
  ARM: report proper DACR value in oops dumps
  ARM: 8464/1: Update all mm structures with section adjustments
  ARM: 8465/1: mm: keep reserved ASIDs in sync with mm after multiple rollovers

8 years agonfsd: don't hold ls_mutex across a layout recall
Jeff Layton [Sun, 29 Nov 2015 13:46:14 +0000 (08:46 -0500)]
nfsd: don't hold ls_mutex across a layout recall

We do need to serialize layout stateid morphing operations, but we
currently hold the ls_mutex across a layout recall which is pretty
ugly. It's also unnecessary -- once we've bumped the seqid and
copied it, we don't need to serialize the rest of the CB_LAYOUTRECALL
vs. anything else. Just drop the mutex once the copy is done.

This was causing a "workqueue leaked lock or atomic" warning and an
occasional deadlock.

There's more work to be done here but this fixes the immediate
regression.

Fixes: cc8a55320b5f "nfsd: serialize layout stateid morphing operations"
Cc: stable@vger.kernel.org
Reported-by: Kinglong Mee <kinglongmee@gmail.com>
Signed-off-by: Jeff Layton <jeff.layton@primarydata.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
8 years agonet: fix warnings in 'make htmldocs' by moving macro definition out of field declaration
Hannes Frederic Sowa [Mon, 14 Dec 2015 22:30:43 +0000 (23:30 +0100)]
net: fix warnings in 'make htmldocs' by moving macro definition out of field declaration

Docbook does not like the definition of macros inside a field declaration
and adds a warning. Move the definition out.

Fixes: 79462ad02e86180 ("net: add validation for the socket syscall protocol argument")
Reported-by: kbuild test robot <lkp@intel.com>
Signed-off-by: Hannes Frederic Sowa <hannes@stressinduktion.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agorhashtable: Fix walker list corruption
Herbert Xu [Wed, 16 Dec 2015 08:45:54 +0000 (16:45 +0800)]
rhashtable: Fix walker list corruption

The commit ba7c95ea3870fe7b847466d39a049ab6f156aa2c ("rhashtable:
Fix sleeping inside RCU critical section in walk_stop") introduced
a new spinlock for the walker list.  However, it did not convert
all existing users of the list over to the new spin lock.  Some
continued to use the old mutext for this purpose.  This obviously
led to corruption of the list.

The fix is to use the spin lock everywhere where we touch the list.

This also allows us to do rcu_rad_lock before we take the lock in
rhashtable_walk_start.  With the old mutex this would've deadlocked
but it's safe with the new spin lock.

Fixes: ba7c95ea3870 ("rhashtable: Fix sleeping inside RCU...")
Reported-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agorhashtable: Enforce minimum size on initial hash table
Herbert Xu [Wed, 16 Dec 2015 10:13:14 +0000 (18:13 +0800)]
rhashtable: Enforce minimum size on initial hash table

William Hua <william.hua@canonical.com> wrote:
>
> I wasn't aware there was an enforced minimum size. I simply set the
> nelem_hint in the rhastable_params struct to 1, expecting it to grow as
> needed. This caused a segfault afterwards when trying to insert an
> element.

OK we're doing the size computation before we enforce the limit
on min_size.

---8<---
We need to do the initial hash table size computation after we
have obtained the correct min_size/max_size parameters.  Otherwise
we may end up with a hash table whose size is outside the allowed
envelope.

Fixes: a998f712f77e ("rhashtable: Round up/down min/max_size to...")
Reported-by: William Hua <william.hua@canonical.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoMerge remote-tracking branches 'spi/fix/dspi' and 'spi/fix/spidev' into spi-linus
Mark Brown [Wed, 16 Dec 2015 13:28:32 +0000 (13:28 +0000)]
Merge remote-tracking branches 'spi/fix/dspi' and 'spi/fix/spidev' into spi-linus

8 years agoMerge remote-tracking branch 'spi/fix/core' into spi-linus
Mark Brown [Wed, 16 Dec 2015 13:28:31 +0000 (13:28 +0000)]
Merge remote-tracking branch 'spi/fix/core' into spi-linus

8 years agospi: fix parent-device reference leak
Johan Hovold [Mon, 14 Dec 2015 15:16:19 +0000 (16:16 +0100)]
spi: fix parent-device reference leak

Fix parent-device reference leak due to SPI-core taking an unnecessary
reference to the parent when allocating the master structure, a
reference that was never released.

Note that driver core takes its own reference to the parent when the
master device is registered.

Fixes: 49dce689ad4e ("spi doesn't need class_device")
Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
Cc: stable@vger.kernel.org
8 years agospi: spidev: Hold spi_lock over all defererences of spi in release()
Mark Brown [Mon, 16 Nov 2015 13:57:37 +0000 (13:57 +0000)]
spi: spidev: Hold spi_lock over all defererences of spi in release()

We use the spi_lock spinlock to protect against races between the device
being removed and file operations on the spidev.  This means that in the
removal path all references to the device need to be done under lock as
in removal we dropping references to the device.

Reported-by: Vegard Nossum <vegard.nossum@oracle.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
8 years agoPartial revert of "powerpc: Individual System V IPC system calls"
Michael Ellerman [Wed, 16 Dec 2015 10:26:28 +0000 (21:26 +1100)]
Partial revert of "powerpc: Individual System V IPC system calls"

This partially reverts commit a34236155afb1cc41945e58388ac988431bcb0b8.

While reviewing the glibc patch to exploit the individual IPC calls,
Arnd & Andreas noticed that we were still requiring userspace to pass
IPC_64 in order to get the new style IPC API.

With a bit of cleanup in the kernel we can drop that requirement, and
instead only provide the new style API, which will simplify things for
userspace.

Rather than try and sneak that patch into 4.4, instead we will drop the
individual IPC calls for powerpc, and merge them again in 4.5 once the
cleanup patch has gone in.

Because we've already added sys_mlock2() as syscall #378, we don't do a
full revert of the IPC calls. Instead we drop the __NR #defines, and
send those now undefined syscall numbers to sys_ni_syscall(). This
leaves a gap in the syscall numbers, but we'll reuse them when we merge
the individual IPC calls.

Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Acked-by: Arnd Bergmann <arnd@arndb.de>
8 years agoinet: tcp: fix inetpeer_set_addr_v4()
Eric Dumazet [Wed, 16 Dec 2015 04:56:44 +0000 (20:56 -0800)]
inet: tcp: fix inetpeer_set_addr_v4()

David Ahern added a vif field in the a4 part of inetpeer_addr struct.

This broke IPv4 TCP fast open client side and more generally tcp metrics
cache, because inetpeer_addr_cmp() is now comparing two u32 instead of
one.

inetpeer_set_addr_v4() needs to properly init vif field, otherwise
the comparison result depends on uninitialized data.

Fixes: 192132b9a034 ("net: Add support for VRFs to inetpeer cache")
Reported-by: Yuchung Cheng <ycheng@google.com>
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Neal Cardwell <ncardwell@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoipv6: automatically enable stable privacy mode if stable_secret set
Hannes Frederic Sowa [Tue, 15 Dec 2015 21:59:12 +0000 (22:59 +0100)]
ipv6: automatically enable stable privacy mode if stable_secret set

Bjørn reported that while we switch all interfaces to privacy stable mode
when setting the secret, we don't set this mode for new interfaces. This
does not make sense, so change this behaviour.

Fixes: 622c81d57b392cc ("ipv6: generation of stable privacy addresses for link-local and autoconf")
Reported-by: Bjørn Mork <bjorn@mork.no>
Cc: Bjørn Mork <bjorn@mork.no>
Signed-off-by: Hannes Frederic Sowa <hannes@stressinduktion.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoRevert "scatterlist: use sg_phys()"
Dan Williams [Tue, 15 Dec 2015 20:54:06 +0000 (12:54 -0800)]
Revert "scatterlist: use sg_phys()"

commit db0fa0cb0157 "scatterlist: use sg_phys()" did replacements of
the form:

    phys_addr_t phys = page_to_phys(sg_page(s));
    phys_addr_t phys = sg_phys(s) & PAGE_MASK;

However, this breaks platforms where sizeof(phys_addr_t) >
sizeof(unsigned long).  Revert for 4.3 and 4.4 to make room for a
combined helper in 4.5.

Cc: <stable@vger.kernel.org>
Cc: Jens Axboe <axboe@fb.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Russell King <linux@arm.linux.org.uk>
Cc: David Woodhouse <dwmw2@infradead.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Fixes: db0fa0cb0157 ("scatterlist: use sg_phys()")
Suggested-by: Joerg Roedel <joro@8bytes.org>
Reported-by: Vitaly Lavrov <vel21ripn@gmail.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
8 years agonet: fix uninitialized variable issue
tadeusz.struk@intel.com [Tue, 15 Dec 2015 18:46:17 +0000 (10:46 -0800)]
net: fix uninitialized variable issue

msg_iocb needs to be initialized on the recv/recvfrom path.
Otherwise afalg will wrongly interpret it as an async call.

Cc: stable@vger.kernel.org
Reported-by: Harald Freudenberger <freude@linux.vnet.ibm.com>
Signed-off-by: Tadeusz Struk <tadeusz.struk@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agobluetooth: Validate socket address length in sco_sock_bind().
David S. Miller [Tue, 15 Dec 2015 20:39:08 +0000 (15:39 -0500)]
bluetooth: Validate socket address length in sco_sock_bind().

Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoInput: elan_i2c - set input device's vendor and product IDs
Charlie Mooney [Tue, 15 Dec 2015 19:32:10 +0000 (11:32 -0800)]
Input: elan_i2c - set input device's vendor and product IDs

Previously the "vendor" and "product" IDs for the elan_i2c driver simply
reported 0000.  This patch modifies the elan_i2c driver to include the
Elan vendor ID and the touchpad's product id under
input/input*/{vendor,product}.

Specifically, this is to allow us to apply a generic Elan gestures config
that will apply to all Elan touchpads on ChromeOS.  These configs  match to
input devices in various ways, but one major way is by matching on vendor
ID.  Adding this patch allows the default Elan touchpad config to be
applied to Elan touchpads in this kernel by matching on devices that have
vendor ID 04f3.

Note that product ID is also available via custom sysfs entry "product_id"
as well.

Signed-off-by: Charlie Mooney <charliemooney@chromium.org>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
8 years agoMerge tag 'dmaengine-fix-4.4-rc6' of git://git.infradead.org/users/vkoul/slave-dma
Linus Torvalds [Tue, 15 Dec 2015 18:56:39 +0000 (10:56 -0800)]
Merge tag 'dmaengine-fix-4.4-rc6' of git://git.infradead.org/users/vkoul/slave-dma

Pull dmaengine fixes from Vinod Koul:
 "This has fixes spread thru driver, notably among them:

   - edma fixes for recent edma DT changes which went into 4.4
   - odd fixes for at_hdmac
   - minor fixes on bc dma and mic dma"

* tag 'dmaengine-fix-4.4-rc6' of git://git.infradead.org/users/vkoul/slave-dma:
  dmaengine: at_xdmac: fix at_xdmac_prep_dma_memcpy()
  dmaengine: edma: DT: Change reserved slot array from 16bit to 32bit type
  dmaengine: edma: DT: Change memcpy channel array from 16bit to 32bit type
  dmaengine: mic_x100: add missing spin_unlock
  dmaengine: bcm2835-dma: Convert to use DMA pool
  dmaengine: at_xdmac: fix bad behavior in interleaved mode
  dmaengine: at_xdmac: fix false condition for memset_sg transfers
  dmaengine: at_xdmac: fix macro typo

8 years agoMerge tag 'fbdev-fixes-4.4' of git://git.kernel.org/pub/scm/linux/kernel/git/tomba...
Linus Torvalds [Tue, 15 Dec 2015 18:50:13 +0000 (10:50 -0800)]
Merge tag 'fbdev-fixes-4.4' of git://git./linux/kernel/git/tomba/linux

Pull two fbdev fixes from Tomi Valkeinen:
 - OMAP: fix analog tv-out when using omapdrm
 - fsl: Fix kernel crash when diu_ops is not implemented

* tag 'fbdev-fixes-4.4' of git://git.kernel.org/pub/scm/linux/kernel/git/tomba/linux:
  OMAPDSS: fix timings for VENC to match what omapdrm expects
  video: fbdev: fsl: Fix kernel crash when diu_ops is not implemented

8 years agoMerge tag 'please-pull-mlock2' of git://git.kernel.org/pub/scm/linux/kernel/git/aegl...
Linus Torvalds [Tue, 15 Dec 2015 18:45:29 +0000 (10:45 -0800)]
Merge tag 'please-pull-mlock2' of git://git./linux/kernel/git/aegl/linux

Pull ia64 fix from Tony Luck:
 "Wire up mlock2() syscall for ia64"

* tag 'please-pull-mlock2' of git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux:
  [IA64] Enable mlock2 syscall for ia64

8 years agonet_sched: make qdisc_tree_decrease_qlen() work for non mq
Eric Dumazet [Tue, 15 Dec 2015 17:43:12 +0000 (09:43 -0800)]
net_sched: make qdisc_tree_decrease_qlen() work for non mq

Stas Nichiporovich reported a regression in his HFSC qdisc setup
on a non multi queue device.

It turns out I mistakenly added a TCQ_F_NOPARENT flag on all qdisc
allocated in qdisc_create() for non multi queue devices, which was
rather buggy. I was clearly mislead by the TCQ_F_ONETXQUEUE that is
also set here for no good reason, since it only matters for the root
qdisc.

Fixes: 4eaf3b84f288 ("net_sched: fix qdisc_tree_decrease_qlen() races")
Reported-by: Stas Nichiporovich <stasn77@gmail.com>
Tested-by: Stas Nichiporovich <stasn77@gmail.com>
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoMerge branch 'ser_gigaset-platform-device-dealloc'
David S. Miller [Tue, 15 Dec 2015 18:24:22 +0000 (13:24 -0500)]
Merge branch 'ser_gigaset-platform-device-dealloc'

Paul Bolle says:

====================
ser_gigaset: fix deallocation of platform device structure

Sascha Levin reported that the syzkaller fuzzer triggered a WARNING in
ser_gigaset (see https://lkml.kernel.org/g/56587467.8050102@oracle.com ). It
turned out that ser_gigaset has always deallocated its platform device
structure incorrectly. Tilman submitted the patch that fixes that (3/4) and a
related cleanup (4/4).

Tilman also submitted a minor cleanup of some NULL checks (1/4) that prompted
Alan to turn those checks into WARN_ONs (2/4). If no one hits these WARN_ONs in
the next couple of releases these WARN_ONs should be removed.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoser_gigaset: remove unnecessary kfree() calls from release method
Tilman Schmidt [Tue, 15 Dec 2015 17:11:31 +0000 (18:11 +0100)]
ser_gigaset: remove unnecessary kfree() calls from release method

device->platform_data and platform_device->resource are never used
and remain NULL through their entire life. Drops the kfree() calls
for them from the device release method.

Signed-off-by: Tilman Schmidt <tilman@imap.cc>
Signed-off-by: Paul Bolle <pebolle@tiscali.nl>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoser_gigaset: fix deallocation of platform device structure
Tilman Schmidt [Tue, 15 Dec 2015 17:11:30 +0000 (18:11 +0100)]
ser_gigaset: fix deallocation of platform device structure

When shutting down the device, the struct ser_cardstate must not be
kfree()d immediately after the call to platform_device_unregister()
since the embedded struct platform_device is still in use.
Move the kfree() call to the release method instead.

Signed-off-by: Tilman Schmidt <tilman@imap.cc>
Fixes: 2869b23e4b95 ("drivers/isdn/gigaset: new M101 driver (v2)")
Reported-by: Sasha Levin <sasha.levin@oracle.com>
Signed-off-by: Paul Bolle <pebolle@tiscali.nl>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoser_gigaset: turn nonsense checks into WARN_ON
Alan Cox [Tue, 15 Dec 2015 17:11:29 +0000 (18:11 +0100)]
ser_gigaset: turn nonsense checks into WARN_ON

These checks do nothing useful to protect the code from races. On the
other hand if the old code has been masking a real bug we would like to
know about it.

The check for tiocmset is kept because it is valid for a tty driver to
have a NULL tiocmset method. That in itself is probably a mistake given
modern coding practices - but needs fixing in the tty layer.

Signed-off-by: Alan Cox <alan@linux.intel.com>
Acked-by: Tilman Schmidt <tilman@imap.cc>
Signed-off-by: Paul Bolle <pebolle@tiscali.nl>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoser_gigaset: fix up NULL checks
Tilman Schmidt [Tue, 15 Dec 2015 17:11:28 +0000 (18:11 +0100)]
ser_gigaset: fix up NULL checks

Commit f34d7a5b7010 ("tty: The big operations rework") changed
tty->driver to tty->ops but left NULL checks for tty->driver untouched.
Fix.

Signed-off-by: Tilman Schmidt <tilman@imap.cc>
[pebolle: removed Fixes tag]
Signed-off-by: Paul Bolle <pebolle@tiscali.nl>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoMerge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6
Linus Torvalds [Tue, 15 Dec 2015 18:21:04 +0000 (10:21 -0800)]
Merge branch 'linus' of git://git./linux/kernel/git/herbert/crypto-2.6

Pull crypto fix from Herbert Xu:
 "This fixes a boundary condition in the blkcipher SG walking code that
  can lead to a crash when used with the new chacha20 algorithm"

* 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6:
  crypto: skcipher - Copy iv from desc even for 0-len walks

8 years agoFix user-visible spelling error
Linus Torvalds [Tue, 15 Dec 2015 18:15:57 +0000 (10:15 -0800)]
Fix user-visible spelling error

Pavel Machek reports a warning about W+X pages found in the "Persisent"
kmap area.  After grepping for it (using the correct spelling), and not
finding it, I noticed how the debug printk was just misspelled.  Fix it.

The actual mapping bug that Pavel reported is still open.  It's
apparently a separate issue from the known EFI page tables, looks like
it's related to the HIGHMEM mappings.

Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
8 years agoqlcnic: fix a timeout loop
Dan Carpenter [Tue, 15 Dec 2015 13:56:16 +0000 (16:56 +0300)]
qlcnic: fix a timeout loop

The problem here is that at the end of the loop we test for if
idc->vnic_wait_limit is zero, but since idc->vnic_wait_limit-- is a
post-op, it actually ends up set to (u8)-1.  I have fixed this by
moving the decrement inside the loop.

Fixes: 486a5bc77a4a ('qlcnic: Add support for 83xx suspend and resume.')
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agosfc: fix a timeout loop
Dan Carpenter [Tue, 15 Dec 2015 11:06:08 +0000 (14:06 +0300)]
sfc: fix a timeout loop

We test for if "tries" is zero at the end but "tries--" is a post-op so
it will end with "tries" set to -1.  I have changed it to a pre-op
instead.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoqlge: fix a timeout loop in ql_change_rx_buffers()
Dan Carpenter [Tue, 15 Dec 2015 10:52:36 +0000 (13:52 +0300)]
qlge: fix a timeout loop in ql_change_rx_buffers()

The problem here is that after the loop we test for "if (!i) " but
because "i--" is a post-op we exit with i set to -1.  I have fixed this
by changing it to a pre-op instead.  I had to change the starting value
from 3 to 4 so that we still iterate 3 times.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoamd-xgbe: fix a couple timeout loops
Dan Carpenter [Tue, 15 Dec 2015 10:12:29 +0000 (13:12 +0300)]
amd-xgbe: fix a couple timeout loops

At the end of the loop we test "if (!count)" but because "count--" is
a post-op then the loop will end with count set to -1.  I have fixed
this by changing it to --count.

Fixes: c5aa9e3b8156 ('amd-xgbe: Initial AMD 10GbE platform driver')
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agomISDN: fix a loop count
Dan Carpenter [Tue, 15 Dec 2015 10:07:52 +0000 (13:07 +0300)]
mISDN: fix a loop count

There are two issue here.
1)  cnt starts as maxloop + 1 so all these loops iterate one more time
    than intended.
2)  At the end of the loop we test for "if (maxloop && !cnt)" but for
    the first two loops, we end with cnt equal to -1.  Changing this to
    a pre-op means we end with cnt set to 0.

Fixes: cae86d4a4e56 ('mISDN: Add driver for Infineon ISDN chipset family')
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoMerge branch 'for-chris-4.4' of git://git.kernel.org/pub/scm/linux/kernel/git/fdmanan...
Chris Mason [Tue, 15 Dec 2015 17:09:59 +0000 (09:09 -0800)]
Merge branch 'for-chris-4.4' of git://git./linux/kernel/git/fdmanana/linux into for-linus-4.4

8 years agoBtrfs: check prepare_uptodate_page() error code earlier
Chris Mason [Mon, 14 Dec 2015 23:40:44 +0000 (15:40 -0800)]
Btrfs: check prepare_uptodate_page() error code earlier

prepare_pages() may end up calling prepare_uptodate_page() twice if our
write only spans a single page.  But if the first call returns an error,
our page will be unlocked and its not safe to call it again.

This bug goes all the way back to 2011, and it's not something commonly
hit.

While we're here, add a more explicit check for the page being truncated
away.  The bare lock_page() alone is protected only by good thoughts and
i_mutex, which we're sure to regret eventually.

Reported-by: Dave Jones <dsj@fb.com>
Signed-off-by: Chris Mason <clm@fb.com>
8 years agoBtrfs: check for empty bitmap list in setup_cluster_bitmaps
Chris Mason [Tue, 15 Dec 2015 15:15:32 +0000 (07:15 -0800)]
Btrfs: check for empty bitmap list in setup_cluster_bitmaps

Dave Jones found a warning from kasan in setup_cluster_bitmaps()

==================================================================
BUG: KASAN: stack-out-of-bounds in setup_cluster_bitmap+0xc4/0x5a0 at
addr ffff88039bef6828
Read of size 8 by task nfsd/1009
page:ffffea000e6fbd80 count:0 mapcount:0 mapping:          (null)
index:0x0
flags: 0x8000000000000000()
page dumped because: kasan: bad access detected
CPU: 1 PID: 1009 Comm: nfsd Tainted: G        W
4.4.0-rc3-backup-debug+ #1
 ffff880065647b50 000000006bb712c2 ffff88039bef6640 ffffffffa680a43e
 0000004559c00000 ffff88039bef66c8 ffffffffa62638d1 ffffffffa61121c0
 ffff8803a5769de8 0000000000000296 ffff8803a5769df0 0000000000046280
Call Trace:
 [<ffffffffa680a43e>] dump_stack+0x4b/0x6d
 [<ffffffffa62638d1>] kasan_report_error+0x501/0x520
 [<ffffffffa61121c0>] ? debug_show_all_locks+0x1e0/0x1e0
 [<ffffffffa6263948>] kasan_report+0x58/0x60
 [<ffffffffa6814b00>] ? rb_last+0x10/0x40
 [<ffffffffa66f8af4>] ? setup_cluster_bitmap+0xc4/0x5a0
 [<ffffffffa6262ead>] __asan_load8+0x5d/0x70
 [<ffffffffa66f8af4>] setup_cluster_bitmap+0xc4/0x5a0
 [<ffffffffa66f675a>] ? setup_cluster_no_bitmap+0x6a/0x400
 [<ffffffffa66fcd16>] btrfs_find_space_cluster+0x4b6/0x640
 [<ffffffffa66fc860>] ? btrfs_alloc_from_cluster+0x4e0/0x4e0
 [<ffffffffa66fc36e>] ? btrfs_return_cluster_to_free_space+0x9e/0xb0
 [<ffffffffa702dc37>] ? _raw_spin_unlock+0x27/0x40
 [<ffffffffa666a1a1>] find_free_extent+0xba1/0x1520

Andrey noticed this was because we were doing list_first_entry on a list
that might be empty.  Rework the tests a bit so we don't do that.

Signed-off-by: Chris Mason <clm@fb.com>
Reprorted-by: Andrey Ryabinin <ryabinin.a.a@gmail.com>
Reported-by: Dave Jones <dsj@fb.com>
8 years agonet/mlx4_core: fix handling return value of mlx4_slave_convert_port
Andrzej Hajda [Mon, 14 Dec 2015 10:05:58 +0000 (11:05 +0100)]
net/mlx4_core: fix handling return value of mlx4_slave_convert_port

The function can return negative values, so its result should
be assigned to signed variable.

The problem has been detected using proposed semantic patch
scripts/coccinelle/tests/assign_signed_to_unsigned.cocci [1].

[1]: http://permalink.gmane.org/gmane.linux.kernel/2046107

Fixes: fc48866f7 ('net/mlx4: Adapt code for N-Port VF')
Signed-off-by: Andrzej Hajda <a.hajda@samsung.com>
Acked-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoALSA: hda - Add a fixup for Thinkpad X1 Carbon 2nd
Takashi Iwai [Thu, 10 Dec 2015 11:20:20 +0000 (12:20 +0100)]
ALSA: hda - Add a fixup for Thinkpad X1 Carbon 2nd

Apply the same fixup for Thinkpad with dock to Thinkpad X1 Carbon 2nd,
too.  This reduces the annoying loud cracking noise problem, as well
as the support of missing docking port.

Bugzilla: https://bugzilla.suse.com/show_bug.cgi?id=958439
Reported-and-tested-by: Benjamin Poirier <bpoirier@suse.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
8 years agoALSA: hda - Set codec to D3 at reboot/shutdown on Thinkpads
Takashi Iwai [Tue, 15 Dec 2015 13:59:58 +0000 (14:59 +0100)]
ALSA: hda - Set codec to D3 at reboot/shutdown on Thinkpads

Lenovo Thinkpads with Realtek codecs may still have some loud
crackling noises at reboot/shutdown even though a few previous fixes
have been applied.  It's because the previous fix (disabling the
default shutup callback) takes effect only at transition of the codec
power state.  Meanwhile, at reboot or shutdown, we don't take down the
codec power as default, thus it triggers the same problem unless the
codec is powered down casually by runtime PM.

This patch tries to address the issue.  It gives two things:
- implement the separate reboot_notify hook to struct alc_spec, and
  call it optionally if defined.
- turn off the codec to D3 for Thinkpad models via this new callback

Bugzilla: https://bugzilla.suse.com/show_bug.cgi?id=958439
Reported-and-tested-by: Benjamin Poirier <bpoirier@suse.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
8 years agoALSA: hda - Apply click noise workaround for Thinkpads generically
Takashi Iwai [Thu, 10 Dec 2015 22:30:43 +0000 (23:30 +0100)]
ALSA: hda - Apply click noise workaround for Thinkpads generically

It seems that a workaround for Thinkpad T440s crackling noise can be
applied generically to all Thinkpad models: namely, disabling the
default alc269 shutup callback.  This patch moves it to the existing
alc_fixup_tpt440_dock() while also replacing the rest code with
another existing alc_fixup_disable_aamix().  It resulted in a good
code reduction.

Bugzilla: https://bugzilla.suse.com/show_bug.cgi?id=958439
Reported-and-tested-by: Benjamin Poirier <bpoirier@suse.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
8 years agoALSA: hda - Fix headphone mic input on a few Dell ALC293 machines
David Henningsson [Tue, 15 Dec 2015 13:44:03 +0000 (14:44 +0100)]
ALSA: hda - Fix headphone mic input on a few Dell ALC293 machines

These laptops support both headphone, headset and mic modes
for the 3.5mm jack.

Cc: stable@vger.kernel.org
BugLink: https://bugs.launchpad.net/bugs/1526330
Signed-off-by: David Henningsson <david.henningsson@canonical.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
8 years agomac80211: handle width changes from opmode notification IE in beacon
Eyal Shapira [Tue, 8 Dec 2015 14:04:36 +0000 (16:04 +0200)]
mac80211: handle width changes from opmode notification IE in beacon

An AP can send an operating channel width change in a beacon
opmode notification IE as long as there's a change in the nss as
well (See 802.11ac-2013 section 10.41).
So don't limit updating to nss only from an opmode notification IE.

Signed-off-by: Eyal Shapira <eyalx.shapira@intel.com>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
8 years agomac80211: suppress unchanged "limiting TX power" messages
Johannes Berg [Tue, 8 Dec 2015 14:04:37 +0000 (16:04 +0200)]
mac80211: suppress unchanged "limiting TX power" messages

When the AP is advertising limited TX power, the message can be
printed over and over again. Suppress it when the power level
isn't changing.

This fixes https://bugzilla.kernel.org/show_bug.cgi?id=106011

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
8 years agomac80211: reprogram in interface order
Johannes Berg [Tue, 8 Dec 2015 14:04:39 +0000 (16:04 +0200)]
mac80211: reprogram in interface order

During reprogramming, mac80211 currently first adds all the channel
contexts, then binds them to the vifs and then goes to reconfigure
all the interfaces. Drivers might, perhaps implicitly, rely on the
operation order for certain things that typically happen within a
single function elsewhere in mac80211. To avoid problems with that,
reorder the code in mac80211's restart/reprogramming to work fully
within the interface loop so that the order of operations is like
in normal operation.

For iwlwifi, this fixes a firmware crash when reprogramming with an
AP/GO interface active.

Reported-by: David Spinadel <david.spinadel@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
8 years agomac80211: run scan completed work on reconfig failure
Johannes Berg [Tue, 8 Dec 2015 14:04:38 +0000 (16:04 +0200)]
mac80211: run scan completed work on reconfig failure

When reconfiguration during resume fails while a scan is pending
for completion work, that work will never run, and the scan will
be stuck forever. Factor out the code to recover this and call it
also in ieee80211_handle_reconfig_failure().

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
8 years agonl80211: Fix potential memory leak in nl80211_connect
Ola Olsson [Fri, 11 Dec 2015 20:04:52 +0000 (21:04 +0100)]
nl80211: Fix potential memory leak in nl80211_connect

Free cached keys if the last early return path is taken.

Signed-off-by: Ola Olsson <ola.olsson@sonymobile.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
8 years agonl80211: Fix potential memory leak in nl80211_set_wowlan
Ola Olsson [Sat, 12 Dec 2015 22:17:17 +0000 (23:17 +0100)]
nl80211: Fix potential memory leak in nl80211_set_wowlan

Compared to cfg80211_rdev_free_wowlan in core.h,
the error goto label lacks the freeing of nd_config.
Fix that.

Signed-off-by: Ola Olsson <ola.olsson@sonymobile.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
8 years agonl80211: fix a few memory leaks in reg.c
Ola Olsson [Sun, 13 Dec 2015 18:12:03 +0000 (19:12 +0100)]
nl80211: fix a few memory leaks in reg.c

The first leak occurs when entering the default case
in the switch for the initiator in set_regdom.
The second leaks a platform_device struct if the
platform registration in regulatory_init succeeds but
the sub sequent regulatory hint fails due to no memory.

Signed-off-by: Ola Olsson <ola.olsson@sonymobile.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
8 years agoARM: 8475/1: SWP emulation: Restore original *data when failed
Shengjiu Wang [Tue, 8 Dec 2015 12:37:19 +0000 (13:37 +0100)]
ARM: 8475/1: SWP emulation: Restore original *data when failed

__user_swpX_asm maybe failed in first STREX operation, emulate_swpX
will try again, but the *data has been changed in first time. which
causes the result is wrong.
This patch is to fix this issue. When STREX succeed, change the *data.
if it fail, *data is not changed.

Signed-off-by: Shengjiu Wang <shengjiu.wang@freescale.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
8 years agoARM: 8471/1: need to save/restore arm register(r11) when it is corrupted
Anson Huang [Mon, 7 Dec 2015 09:09:19 +0000 (10:09 +0100)]
ARM: 8471/1: need to save/restore arm register(r11) when it is corrupted

In cpu_v7_do_suspend routine, r11 is used while it is NOT
saved/restored, different compiler may have different usage
of ARM general registers, so it may cause issues during
calling cpu_v7_do_suspend.

We meet kernel fault occurs when using GCC 4.8.3, r11 contains
valid value before calling into cpu_v7_do_suspend, but when returned
from this routine, r11 is corrupted and lead to kernel fault.
Doing save/restore for those corrupted registers is a must in
assemble code.

Signed-off-by: Anson Huang <Anson.Huang@freescale.com>
Reviewed-by: Nicolas Pitre <nico@linaro.org>
Cc: <stable@vger.kernel.org> # v3.3+
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
8 years agoARM: fix uaccess_with_memcpy() with SW_DOMAIN_PAN
Russell King [Sat, 5 Dec 2015 13:42:07 +0000 (13:42 +0000)]
ARM: fix uaccess_with_memcpy() with SW_DOMAIN_PAN

The uaccess_with_memcpy() code is currently incompatible with the SW
PAN code: it takes locks within the region that we've changed the DACR,
potentially sleeping as a result.  As we do not save and restore the
DACR across co-operative sleep events, can lead to an incorrect DACR
value later in this code path.

Reported-by: Peter Rosin <peda@axentia.se>
Tested-by: Peter Rosin <peda@axentia.se>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
8 years agoskbuff: Fix offset error in skb_reorder_vlan_header
Vlad Yasevich [Mon, 14 Dec 2015 22:44:10 +0000 (17:44 -0500)]
skbuff: Fix offset error in skb_reorder_vlan_header

skb_reorder_vlan_header is called after the vlan header has
been pulled.  As a result the offset of the begining of
the mac header has been incrased by 4 bytes (VLAN_HLEN).
When moving the mac addresses, include this incrase in
the offset calcualation so that the mac addresses are
copied correctly.

Fixes: a6e18ff1117 (vlan: Fix untag operations of stacked vlans with REORDER_HEADER off)
CC: Nicolas Dichtel <nicolas.dichtel@6wind.com>
CC: Patrick McHardy <kaber@trash.net>
Signed-off-by: Vladislav Yasevich <vyasevich@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agopptp: verify sockaddr_len in pptp_bind() and pptp_connect()
WANG Cong [Mon, 14 Dec 2015 21:48:36 +0000 (13:48 -0800)]
pptp: verify sockaddr_len in pptp_bind() and pptp_connect()

Reported-by: Dmitry Vyukov <dvyukov@gmail.com>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoravb: Add disable 10base
Kazuya Mizuguchi [Sun, 13 Dec 2015 15:15:58 +0000 (00:15 +0900)]
ravb: Add disable 10base

Ethernet AVB does not support 10 Mbps transfer speed.

Signed-off-by: Kazuya Mizuguchi <kazuya.mizuguchi.ks@renesas.com>
Signed-off-by: Yoshihiro Kaneko <ykaneko0929@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agosh_eth: fix descriptor access endianness
Sergei Shtylyov [Sun, 13 Dec 2015 20:05:07 +0000 (23:05 +0300)]
sh_eth: fix descriptor access endianness

The driver never  calls cpu_to_edmac() when writing the descriptor address
and edmac_to_cpu() when reading it, although it should -- fix this.

Note that the frame/buffer length descriptor field accesses also need fixing
but since they are both 16-bit we can't  use {cpu|edmac}_to_{edmac|cpu}()...

Signed-off-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agosh_eth: fix TX buffer byte-swapping
Sergei Shtylyov [Sun, 13 Dec 2015 18:27:04 +0000 (21:27 +0300)]
sh_eth: fix TX buffer byte-swapping

For the little-endian SH771x kernels the driver has to byte-swap the RX/TX
buffers,  however yet unset physcial address from the TX descriptor is used
to call sh_eth_soft_swap(). Use 'skb->data' instead...

Fixes: 31fcb99d9958 ("net: sh_eth: remove __flush_purge_region")
Signed-off-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agonet: fix IP early demux races
Eric Dumazet [Mon, 14 Dec 2015 22:08:53 +0000 (14:08 -0800)]
net: fix IP early demux races

David Wilder reported crashes caused by dst reuse.

<quote David>
  I am seeing a crash on a distro V4.2.3 kernel caused by a double
  release of a dst_entry.  In ipv4_dst_destroy() the call to
  list_empty() finds a poisoned next pointer, indicating the dst_entry
  has already been removed from the list and freed. The crash occurs
  18 to 24 hours into a run of a network stress exerciser.
</quote>

Thanks to his detailed report and analysis, we were able to understand
the core issue.

IP early demux can associate a dst to skb, after a lookup in TCP/UDP
sockets.

When socket cache is not properly set, we want to store into
sk->sk_dst_cache the dst for future IP early demux lookups,
by acquiring a stable refcount on the dst.

Problem is this acquisition is simply using an atomic_inc(),
which works well, unless the dst was queued for destruction from
dst_release() noticing dst refcount went to zero, if DST_NOCACHE
was set on dst.

We need to make sure current refcount is not zero before incrementing
it, or risk double free as David reported.

This patch, being a stable candidate, adds two new helpers, and use
them only from IP early demux problematic paths.

It might be possible to merge in net-next skb_dst_force() and
skb_dst_force_safe(), but I prefer having the smallest patch for stable
kernels : Maybe some skb_dst_force() callers do not expect skb->dst
can suddenly be cleared.

Can probably be backported back to linux-3.6 kernels

Reported-by: David J. Wilder <dwilder@us.ibm.com>
Tested-by: David J. Wilder <dwilder@us.ibm.com>
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agodrm: Don't overwrite UNVERFIED mode status to OK
Ville Syrjälä [Thu, 3 Dec 2015 21:14:09 +0000 (23:14 +0200)]
drm: Don't overwrite UNVERFIED mode status to OK

The way the mode probing works is this:
1. All modes currently on the mode list are marked as UNVERIFIED
2. New modes are on the probed_modes list (they start with
   status OK)
3. Modes are moved from the probed_modes list to the actual
   mode list. If a mode already on the mode list is deemed
   to match one of the probed modes, the duplicate is dropped
   and the mode status updated to OK. After this the
   probed_modes list will be empty.
4. All modes on the mode list are verified to not violate any
   constraints. Any that do are marked as such.
5. Any mode left with a non-OK status is pruned from the list,
   with an appropriate debug message.

What all this means is that any mode on the original list that
didn't have a duplicate on the probed_modes list, should be left
with status UNVERFIED (or previously could have been left with
some other status, but never OK).

I broke that in
commit 05acaec334fc ("drm: Reorganize probed mode validation")
by always assigning something to the mode->status during the validation
step. So any mode from the old list that still passed the validation
would be left on the list with status OK in the end.

Fix this by not doing the basic mode validation unless the mode
already has status OK (meaning it came from the probed_modes list,
or at least a duplicate of it was on that list). This way we will
correctly prune away any mode from the old mode list that didn't
appear on the probed_modes list.

Cc: stable@vger.kernel.org
Cc: Adam Jackson <ajax@redhat.com>
Fixes: 05acaec334fc ("drm: Reorganize probed mode validation")
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1449177255-9515-2-git-send-email-ville.syrjala@linux.intel.com
Testcase: igt/kms_force_connector_basic/prune-stale-modes
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=93332
[danvet: Also applying to drm-misc to avoid too much conflict hell -
there's a big pile of patches from Ville on top of this one.]
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Dave Airlie <airlied@redhat.com>
8 years agoMerge tag 'drm-intel-fixes-2015-12-11' of git://anongit.freedesktop.org/drm-intel...
Dave Airlie [Tue, 15 Dec 2015 00:25:21 +0000 (10:25 +1000)]
Merge tag 'drm-intel-fixes-2015-12-11' of git://anongit.freedesktop.org/drm-intel into drm-fixes

Here are some i915 fixes for v4.4, sorry for being late this week.

* tag 'drm-intel-fixes-2015-12-11' of git://anongit.freedesktop.org/drm-intel:
  drm/i915: Do a better job at disabling primary plane in the noatomic case.
  drm/i915/skl: Double RC6 WRL always on
  drm/i915/skl: Disable coarse power gating up until F0
  drm/i915: Remove incorrect warning in context cleanup

8 years agoMerge tag 'omapdrm-4.4-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tomba...
Dave Airlie [Tue, 15 Dec 2015 00:24:52 +0000 (10:24 +1000)]
Merge tag 'omapdrm-4.4-fixes' of git://git./linux/kernel/git/tomba/linux into drm-fixes

omapdrm fix for 4.4

* tag 'omapdrm-4.4-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tomba/linux:
  drm/omap: fix fbdev pix format to support all platforms

8 years agoMerge branches 'powercap', 'pm-cpufreq' and 'pm-domains'
Rafael J. Wysocki [Mon, 14 Dec 2015 21:58:57 +0000 (22:58 +0100)]
Merge branches 'powercap', 'pm-cpufreq' and 'pm-domains'

* powercap:
  powercap / RAPL: fix BIOS lock check

* pm-cpufreq:
  cpufreq: intel_pstate: Minor cleanup for FRAC_BITS
  cpufreq: tegra: add regulator dependency for T124

* pm-domains:
  PM / Domains: Allow runtime PM callbacks to be re-used during system PM

8 years agosh_eth: uninline sh_eth_{write|read}()
Sergei Shtylyov [Sat, 12 Dec 2015 22:44:50 +0000 (01:44 +0300)]
sh_eth: uninline sh_eth_{write|read}()

Commit 3365711df024 ("sh_eth: WARN on access to a register not implemented in
in  a particular chip") added WARN_ON() to sh_eth_{read|write}(), thus making
it  unacceptable for these functions to be *inline* anymore. Remove *inline*
and move the functions from the header to the driver itself. Below   is our
code economy with ARM gcc 4.7.3:

$ size drivers/net/ethernet/renesas/sh_eth.o{~,}
   text    data     bss     dec     hex filename
  32489    1140       0   33629    835d drivers/net/ethernet/renesas/sh_eth.o~
  25413    1140       0   26553    67b9 drivers/net/ethernet/renesas/sh_eth.o

Suggested-by: Ben Hutchings <ben.hutchings@codethink.co.uk>
Signed-off-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agostmmac: dwmac-sunxi: Call exit cleanup function in probe error path
Chen-Yu Tsai [Fri, 11 Dec 2015 10:03:49 +0000 (18:03 +0800)]
stmmac: dwmac-sunxi: Call exit cleanup function in probe error path

dwmac-sunxi has 2 callbacks that were called from stmmac_platform as
part of the probe and remove sequences.

Ater the conversion of dwmac-sunxi into a standalone platform driver,
the .init function is called before calling into the stmmac driver
core, but .exit is not called to clean up if stmmac returns an error.

This patch fixes the probe error path. This properly cleans up and
releases resources when the driver core fails to probe.

Cc: Joachim Eastwood <manabian@gmail.com>
Fixes: 9a9e9a1edee8 ("stmmac: dwmac-sunxi: turn setup callback into a
      probe function")
Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agonet: add validation for the socket syscall protocol argument
Hannes Frederic Sowa [Mon, 14 Dec 2015 21:03:39 +0000 (22:03 +0100)]
net: add validation for the socket syscall protocol argument

郭永刚 reported that one could simply crash the kernel as root by
using a simple program:

int socket_fd;
struct sockaddr_in addr;
addr.sin_port = 0;
addr.sin_addr.s_addr = INADDR_ANY;
addr.sin_family = 10;

socket_fd = socket(10,3,0x40000000);
connect(socket_fd , &addr,16);

AF_INET, AF_INET6 sockets actually only support 8-bit protocol
identifiers. inet_sock's skc_protocol field thus is sized accordingly,
thus larger protocol identifiers simply cut off the higher bits and
store a zero in the protocol fields.

This could lead to e.g. NULL function pointer because as a result of
the cut off inet_num is zero and we call down to inet_autobind, which
is NULL for raw sockets.

kernel: Call Trace:
kernel:  [<ffffffff816db90e>] ? inet_autobind+0x2e/0x70
kernel:  [<ffffffff816db9a4>] inet_dgram_connect+0x54/0x80
kernel:  [<ffffffff81645069>] SYSC_connect+0xd9/0x110
kernel:  [<ffffffff810ac51b>] ? ptrace_notify+0x5b/0x80
kernel:  [<ffffffff810236d8>] ? syscall_trace_enter_phase2+0x108/0x200
kernel:  [<ffffffff81645e0e>] SyS_connect+0xe/0x10
kernel:  [<ffffffff81779515>] tracesys_phase2+0x84/0x89

I found no particular commit which introduced this problem.

CVE: CVE-2015-8543
Cc: Cong Wang <cwang@twopensource.com>
Reported-by: 郭永刚 <guoyonggang@360.cn>
Signed-off-by: Hannes Frederic Sowa <hannes@stressinduktion.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agonet: phy: mdio-mux: Check return value of mdiobus_alloc()
Tobias Klauser [Mon, 14 Dec 2015 12:51:51 +0000 (13:51 +0100)]
net: phy: mdio-mux: Check return value of mdiobus_alloc()

mdiobus_alloc() might return NULL, but its return value is not
checked in mdio_mux_init(). This could potentially lead to a NULL
pointer dereference. Fix it by checking the return value

Fixes: 0ca2997d1452 ("netdev/of/phy: Add MDIO bus multiplexer support.")
Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoopenvswitch: fix trivial comment typo
Paolo Abeni [Mon, 14 Dec 2015 13:29:58 +0000 (14:29 +0100)]
openvswitch: fix trivial comment typo

The commit 33db4125ec74 ("openvswitch: Rename LABEL->LABELS") left
over an old OVS_CT_ATTR_LABEL instance, fix it.

Fixes: 33db4125ec74 ("openvswitch: Rename LABEL->LABELS")
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Acked-by: Joe Stringer <joe@ovn.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years ago[IA64] Enable mlock2 syscall for ia64
Tony Luck [Mon, 14 Dec 2015 18:30:02 +0000 (10:30 -0800)]
[IA64] Enable mlock2 syscall for ia64

New system call added in
  commit a8ca5d0ecbdde5cc3d7accacbd69968b0c98764e
  mm: mlock: add new mlock system call

Signed-off-by: Tony Luck <tony.luck@intel.com>
8 years agoMerge git://git.kernel.org/pub/scm/linux/kernel/git/pablo/nf
David S. Miller [Mon, 14 Dec 2015 16:09:01 +0000 (11:09 -0500)]
Merge git://git./pub/scm/linux/kernel/git/pablo/nf

Pablo Neira Ayuso says:

====================
netfilter fixes for net

The following patchset contains Netfilter fixes for you net tree,
specifically for nf_tables and nfnetlink_queue, they are:

1) Avoid a compilation warning in nfnetlink_queue that was introduced
   in the previous merge window with the simplification of the conntrack
   integration, from Arnd Bergmann.

2) nfnetlink_queue is leaking the pernet subsystem registration from
   a failure path, patch from Nikolay Borisov.

3) Pass down netns pointer to batch callback in nfnetlink, this is the
   largest patch and it is not a bugfix but it is a dependency to
   resolve a splat in the correct way.

4) Fix a splat due to incorrect socket memory accounting with nfnetlink
   skbuff clones.

5) Add missing conntrack dependencies to NFT_DUP_IPV4 and NFT_DUP_IPV6.

6) Traverse the nftables commit list in reverse order from the commit
   path, otherwise we crash when the user applies an incremental update
   via 'nft -f' that deletes an object that was just introduced in this
   batch, from Xin Long.

Regarding the compilation warning fix, many people have sent us (and
keep sending us) patches to address this, that's why I'm including this
batch even if this is not critical.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoKVM: VMX: Fix host initiated access to guest MSR_TSC_AUX
Haozhong Zhang [Mon, 14 Dec 2015 15:13:38 +0000 (23:13 +0800)]
KVM: VMX: Fix host initiated access to guest MSR_TSC_AUX

The current handling of accesses to guest MSR_TSC_AUX returns error if
vcpu does not support rdtscp, though those accesses are initiated by
host. This can result in the reboot failure of some versions of
QEMU. This patch fixes this issue by passing those host initiated
accesses for further handling instead.

Signed-off-by: Haozhong Zhang <haozhong.zhang@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
8 years agoiommu/vt-d: Do access checks before calling handle_mm_fault()
Joerg Roedel [Tue, 17 Nov 2015 15:11:39 +0000 (16:11 +0100)]
iommu/vt-d: Do access checks before calling handle_mm_fault()

Not doing so is a bug and might trigger a BUG_ON in
handle_mm_fault(). So add the proper permission checks
before calling into mm code.

Reviewed-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Acked-By: David Woodhouse <David.Woodhouse@intel.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
8 years agoiommu/amd: Do proper access checking before calling handle_mm_fault()
Joerg Roedel [Tue, 17 Nov 2015 15:11:36 +0000 (16:11 +0100)]
iommu/amd: Do proper access checking before calling handle_mm_fault()

The handle_mm_fault function expects the caller to do the
access checks. Not doing so and calling the function with
wrong permissions is a bug (catched by a BUG_ON).
So fix this bug by adding proper access checking to the io
page-fault code in the AMD IOMMUv2 driver.

Reviewed-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Acked-By: David Woodhouse <David.Woodhouse@intel.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
8 years agoMAINTAINERS: pinctrl: Add maintainers for pinctrl-single
Tony Lindgren [Thu, 10 Dec 2015 22:27:32 +0000 (14:27 -0800)]
MAINTAINERS: pinctrl: Add maintainers for pinctrl-single

Otherwise we keep missing patches related to this driver.

Cc: Haojian Zhuang <haojian.zhuang@linaro.org>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>