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13 June 2022, 11:31:42 UTC
Revision db196935d9562abec4510f48d887bc1f1e054fcf authored by Hiral Shah on 14 July 2015, 14:08:57 UTC, committed by James Bottomley on 18 August 2015, 15:11:23 UTC 
fnic: Use the local variable instead of I/O flag to acquire io_req_lock in fnic_queuecommand() to avoid deadloack
 
We added changes in fnic driver patch 1.6.0.16 to acquire
io_req_lock in fnic_queuecommand() before issuing I/O so that io completion
is serialized. But when releasing the lock we check for the I/O flag and
this could be modified if IO abort occurs before I/O completion. In this case
we wont release the lock and causes deadlock in some scenerios. Using the
local variable to check the IO lock status will resolve the problem.

Fixes: 41df7b02db82cf6c14f094757bac3830d10a827f
Signed-off-by: Hiral Shah <hishah@cisco.com>
Signed-off-by: Sesidhar Baddela <sebaddel@cisco.com>
Signed-off-by: Anil Chintalapati <achintal@cisco.com>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Cc: stable@vger.kernel.org
Signed-off-by: James Bottomley <JBottomley@Odin.com>
1 parent 4f258a4
History
Tip revision: db196935d9562abec4510f48d887bc1f1e054fcf authored by Hiral Shah on 14 July 2015, 14:08:57 UTC
fnic: Use the local variable instead of I/O flag to acquire io_req_lock in fnic_queuecommand() to avoid deadloack
Tip revision: db19693
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