Commit 79bdf12f authored by Hannes Reinecke's avatar Hannes Reinecke Committed by Greg Kroah-Hartman

scsi_dh_rdac: always retry MODE SELECT on command lock violation

commit d2d06d4f upstream.

If MODE SELECT returns with sense '05/91/36' (command lock violation)
it should always be retried without counting the number of retries.
During an HBA upgrade or similar circumstances one might see a flood
of MODE SELECT command from various HBAs, which will easily trigger
the sense code and exceed the retry count.
Signed-off-by: default avatarHannes Reinecke <hare@suse.de>
Reviewed-by: default avatarJohannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: default avatarMartin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 14f6db54
......@@ -569,7 +569,7 @@ static int mode_select_handle_sense(struct scsi_device *sdev,
/*
* Command Lock contention
*/
err = SCSI_DH_RETRY;
err = SCSI_DH_IMM_RETRY;
break;
default:
break;
......@@ -619,6 +619,8 @@ static void send_mode_select(struct work_struct *work)
err = mode_select_handle_sense(sdev, h->sense);
if (err == SCSI_DH_RETRY && retry_cnt--)
goto retry;
if (err == SCSI_DH_IMM_RETRY)
goto retry;
}
if (err == SCSI_DH_OK) {
h->state = RDAC_STATE_ACTIVE;
......
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