scsi: lpfc: Fix missing wakeups on abort threads

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: c2017260eea2d ("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
index c98f264..a497b2c 100644 (file)
--- 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);