scsi: lpfc: Fix missing wakeups on abort threads

jsmart-gh · martinkpetersen · commit 4eb015358866 · 2019-04-03T23:35:09.000-04:00
Abort thread wakeups, on some wqe types, are not happening. The thread wakeup logic is dependent upon the LPFC_DRIVER_ABORTED flag. However, on these wqes, the completion handler running prior to the io completion routine ends up clearing the flag. Rework the wakeup logic to look at a non-null waitq element which must be set if the abort thread is waiting. This is reverting the change in the indicated patch. Fixes: c201726 ("scsi: lpfc: Rework locking on SCSI io completion") Signed-off-by: Dick Kennedy <dick.kennedy@broadcom.com> Signed-off-by: James Smart <jsmart2021@gmail.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
diff --git a/drivers/scsi/lpfc/lpfc_scsi.c b/drivers/scsi/lpfc/lpfc_scsi.c
@@ -3878,10 +3878,9 @@ lpfc_scsi_cmd_iocb_cmpl(struct lpfc_hba *phba, struct lpfc_iocbq *pIocbIn,
 	 * wake up the thread.
 	 */
 	spin_lock(&lpfc_cmd->buf_lock);
-	if (unlikely(lpfc_cmd->cur_iocbq.iocb_flag & LPFC_DRIVER_ABORTED)) {
-		lpfc_cmd->cur_iocbq.iocb_flag &= ~LPFC_DRIVER_ABORTED;
-		if (lpfc_cmd->waitq)
-			wake_up(lpfc_cmd->waitq);
+	lpfc_cmd->cur_iocbq.iocb_flag &= ~LPFC_DRIVER_ABORTED;
+	if (lpfc_cmd->waitq) {
+		wake_up(lpfc_cmd->waitq);
 		lpfc_cmd->waitq = NULL;
 	}
 	spin_unlock(&lpfc_cmd->buf_lock);
