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qla2xxx: Do not crash system for sp ref count zero

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Aovid crashing the system in the scenario where firmware
just completes the command and it can not find the command
during abort mailbox processing. This scenario can lead to
sp reference counter being zero. Instead of crashing the
system, use WARN_ON to print warning in log file.

Signed-off-by: Hiral Patel <hiral.patel@qlogic.com>
Signed-off-by: Himanshu Madhani <himanshu.madhani@qlogic.com>
Signed-off-by: James Bottomley <JBottomley@Odin.com>
This commit is contained in:
Hiral Patel 2015-08-04 13:37:56 -04:00 committed by James Bottomley
parent d6b9b42b49
commit 8fbdac8c70
1 changed files with 1 additions and 1 deletions
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2
drivers/scsi/qla2xxx/qla_os.c
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@ -656,7 +656,7 @@ qla2x00_sp_compl(void *data, void *ptr, int res)
"SP reference-count to ZERO -- sp=%p cmd=%p.\n",
sp, GET_CMD_SP(sp));
if (ql2xextended_error_logging & ql_dbg_io)
BUG();
WARN_ON(atomic_read(&sp->ref_count) == 0);
return;
}
if (!atomic_dec_and_test(&sp->ref_count))