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In the case when a SCSI_CMD times out, bnx2fc will initiate the sending of the
ABTS. However, if the SCSI layer's SCSI command timer also times out, it'll
instantiate a task abort of the same xid.
The race condition this patch tries to fix is as follows:
SCSI_CMD timeout (20s)
thread 1 thread 2
send ABTS
rx ABTS cmpl
task abort_eh
explicit LOGO since ABTS was engaged
CLEANUP cmpl
SCSI_CMD cmpl (ABTS cmpl)
instantiate RRQ
wait 10s
attempt to send RRQ (because of LOGO, it wouldn't continue)
Note that there is no call to scsi_done for this SCSI_CMD cmpletion
in this path.
The patch changes the path of execution to call scsi_done immediately
instead of instantiating the RRQ.
Signed-off-by: Eddie Wai <eddie.wai@broadcom.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
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|---|---|---|
| .. | ||
| 57xx_hsi_bnx2fc.h | ||
| bnx2fc_constants.h | ||
| bnx2fc_debug.c | ||
| bnx2fc_debug.h | ||
| bnx2fc_els.c | ||
| bnx2fc_fcoe.c | ||
| bnx2fc_hwi.c | ||
| bnx2fc_io.c | ||
| bnx2fc_tgt.c | ||
| bnx2fc.h | ||
| Kconfig | ||
| Makefile | ||