aoe: manipulate aoedev network stats under lock
authorEd Cashin <ecashin@coraid.com>
Tue, 18 Dec 2012 00:03:47 +0000 (16:03 -0800)
committerLinus Torvalds <torvalds@linux-foundation.org>
Tue, 18 Dec 2012 01:15:24 +0000 (17:15 -0800)
commit0d555ecfa468f6dc29697829844f2f79909e376f
tree53e9ad45f578f0eed1a64309e825afc8d576ae29
parent2292a7e109d28ffd70ad060b241f9bd2a687dfa0
aoe: manipulate aoedev network stats under lock

With this bugfix in place the calculation of the criterion for "lateness"
is performed under lock.  Without the lock, there is a chance that one of
the non-atomic operations performed on the round trip time statistics
could be incomplete, such that an incorrect lateness criterion would be
calculated.

Without this change, the effect of the bug would be rare unecessary but
benign retransmissions.

Signed-off-by: Ed Cashin <ecashin@coraid.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
drivers/block/aoe/aoecmd.c