MIPS: kvm: Fix ioctl error handling.
authorMichael S. Tsirkin <mst@redhat.com>
Sun, 28 Feb 2016 15:35:59 +0000 (17:35 +0200)
committerRalf Baechle <ralf@linux-mips.org>
Mon, 29 Feb 2016 14:52:20 +0000 (15:52 +0100)
commit887349f69f37e71e2a8bfbd743831625a0b2ff51
treeac0d63782c01d60270a07279514394759062640e
parent56fa81fc9a5445938f3aa2e63d15ab63dc938ad6
MIPS: kvm: Fix ioctl error handling.

Calling return copy_to_user(...) or return copy_from_user in an ioctl
will not do the right thing if there's a pagefault:
copy_to_user/copy_from_user return the number of bytes not copied in
this case.

Fix up kvm on mips to do
return copy_to_user(...)) ?  -EFAULT : 0;
and
return copy_from_user(...)) ?  -EFAULT : 0;

everywhere.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: James Hogan <james.hogan@imgtec.com>
Cc: linux-kernel@vger.kernel.org
Cc: linux-mips@linux-mips.org
Cc: stable@vger.kernel.org
Cc: kvm@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/12709/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
arch/mips/kvm/mips.c