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Preserve the device queue status before retrying a sense request in

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chdone(). Previously, the retry could clear the CAM_DEV_QFRZN bit in the
CCB status, leaving the queue frozen.

Submitted by:	Jeff Miller <Jeff.Miller@isilon.com>
Reviewed by:	ken
MFC after:	2 weeks
Sponsored by:	EMC / Isilon Storage Division
This commit is contained in:
markj 2015-09-15 05:09:17 +00:00
parent a0800810ee
commit 67708eb40c
1 changed files with 6 additions and 3 deletions
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9
sys/cam/scsi/scsi_ch.c
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@ -655,11 +655,13 @@ chdone(struct cam_periph *periph, union ccb *done_ccb)
*/
return;
} else if (error != 0) {
int retry_scheduled;
struct scsi_mode_sense_6 *sms;
int frozen, retry_scheduled;
sms = (struct scsi_mode_sense_6 *)
done_ccb->csio.cdb_io.cdb_bytes;
frozen = (done_ccb->ccb_h.status &
CAM_DEV_QFRZN) != 0;
/*
* Check to see if block descriptors were
@ -670,7 +672,8 @@ chdone(struct cam_periph *periph, union ccb *done_ccb)
* block descriptors were disabled, enable
* them and re-send the command.
*/
if (sms->byte2 & SMS_DBD) {
if ((sms->byte2 & SMS_DBD) != 0 &&
(periph->flags & CAM_PERIPH_INVALID) == 0) {
sms->byte2 &= ~SMS_DBD;
xpt_action(done_ccb);
softc->quirks |= CH_Q_NO_DBD;
@ -679,7 +682,7 @@ chdone(struct cam_periph *periph, union ccb *done_ccb)
retry_scheduled = 0;
/* Don't wedge this device's queue */
if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0)
if (frozen)
cam_release_devq(done_ccb->ccb_h.path,
/*relsim_flags*/0,
/*reduction*/0,