[SCSI] bfa: fix possible IO double completion

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While processing the ioim in callback functions, the ioim is still in io_q.
During this time, if the itnim goes offline, the ioim is requeued from
itnim->io_q into itnim->delay_comp_q although the request is already completed.
This results in requeing the ioim into the callback queue if the ioim is not
freed by the time the ioim is requeued. This results in double completion of
the ioim. To fix this, whenever a response is received from firmware for an
ioim, deque it from io_q and enque to fcpim->comp_q. This will eliminate any
possibility of itnim picking any ioim for which the response is already
received.

Signed-off-by: Jing Huang <huangj@brocade.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>

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Jing Huang 2010-07-08 19:58:45 -07:00 • committed by James Bottomley

parent db954c04cb

commit 56d218fc93

1 changed files with 34 additions and 0 deletions

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drivers/scsi/bfa/bfa_ioim.c

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