Correct lock handling to eliminate reset escalation on I/O abort
Signed-off-by: James Smart <james.smart@xxxxxxxxxx>
---
lpfc_scsi.c | 12 +++++++++---
1 file changed, 9 insertions(+), 3 deletions(-)
diff -upNr a/drivers/scsi/lpfc/lpfc_scsi.c b/drivers/scsi/lpfc/lpfc_scsi.c
--- a/drivers/scsi/lpfc/lpfc_scsi.c 2012-08-11 12:24:52.431924247 -0400
+++ b/drivers/scsi/lpfc/lpfc_scsi.c 2012-08-11 12:24:52.657924240 -0400
@@ -3829,12 +3829,15 @@ lpfc_scsi_cmd_iocb_cmpl(struct lpfc_hba
cmd->scsi_done(cmd);
if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
+ spin_lock_irq(&phba->hbalock);
+ lpfc_cmd->pCmd = NULL;
+ spin_unlock_irq(&phba->hbalock);
+
/*
* If there is a thread waiting for command completion
* wake up the thread.
*/
spin_lock_irqsave(shost->host_lock, flags);
- lpfc_cmd->pCmd = NULL;
if (lpfc_cmd->waitq)
wake_up(lpfc_cmd->waitq);
spin_unlock_irqrestore(shost->host_lock, flags);
@@ -3868,12 +3871,15 @@ lpfc_scsi_cmd_iocb_cmpl(struct lpfc_hba
}
}
+ spin_lock_irq(&phba->hbalock);
+ lpfc_cmd->pCmd = NULL;
+ spin_unlock_irq(&phba->hbalock);
+
/*
* If there is a thread waiting for command completion
* wake up the thread.
*/
spin_lock_irqsave(shost->host_lock, flags);
- lpfc_cmd->pCmd = NULL;
if (lpfc_cmd->waitq)
wake_up(lpfc_cmd->waitq);
spin_unlock_irqrestore(shost->host_lock, flags);
@@ -4409,7 +4415,7 @@ lpfc_abort_handler(struct scsi_cmnd *cmn
}
lpfc_cmd = (struct lpfc_scsi_buf *)cmnd->host_scribble;
- if (!lpfc_cmd) {
+ if (!lpfc_cmd || !lpfc_cmd->pCmd) {
spin_unlock_irq(&phba->hbalock);
lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
"2873 SCSI Layer I/O Abort Request IO CMPL Status "
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