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Diffstat (limited to 'drivers/scsi')
-rw-r--r--drivers/scsi/device_handler/scsi_dh_alua.c45
1 files changed, 17 insertions, 28 deletions
diff --git a/drivers/scsi/device_handler/scsi_dh_alua.c b/drivers/scsi/device_handler/scsi_dh_alua.c
index 7a34ffb41382..39654b1703b3 100644
--- a/drivers/scsi/device_handler/scsi_dh_alua.c
+++ b/drivers/scsi/device_handler/scsi_dh_alua.c
@@ -85,7 +85,6 @@ struct alua_dh_data {
#define ALUA_POLICY_SWITCH_ALL 1
static char print_alua_state(int);
-static int alua_check_sense(struct scsi_device *, struct scsi_sense_hdr *);
static int realloc_buffer(struct alua_dh_data *h, unsigned len)
{
@@ -189,8 +188,13 @@ static void stpg_endio(struct request *req, int error)
if (scsi_normalize_sense(h->sense, SCSI_SENSE_BUFFERSIZE,
&sense_hdr)) {
- err = alua_check_sense(h->sdev, &sense_hdr);
- if (err == ADD_TO_MLQUEUE) {
+ if (sense_hdr.sense_key == NOT_READY &&
+ sense_hdr.asc == 0x04 && sense_hdr.ascq == 0x0a) {
+ /* ALUA state transition already in progress */
+ err = SCSI_DH_OK;
+ goto done;
+ }
+ if (sense_hdr.sense_key == UNIT_ATTENTION) {
err = SCSI_DH_RETRY;
goto done;
}
@@ -399,28 +403,6 @@ static int alua_check_sense(struct scsi_device *sdev,
* LUN Not Accessible - ALUA state transition
*/
return ADD_TO_MLQUEUE;
- if (sense_hdr->asc == 0x04 && sense_hdr->ascq == 0x0b)
- /*
- * LUN Not Accessible -- Target port in standby state
- */
- return SUCCESS;
- if (sense_hdr->asc == 0x04 && sense_hdr->ascq == 0x0c)
- /*
- * LUN Not Accessible -- Target port in unavailable state
- */
- return SUCCESS;
- if (sense_hdr->asc == 0x04 && sense_hdr->ascq == 0x12)
- /*
- * LUN Not Ready -- Offline
- */
- return SUCCESS;
- if (sdev->allow_restart &&
- sense_hdr->asc == 0x04 && sense_hdr->ascq == 0x02)
- /*
- * if the device is not started, we need to wake
- * the error handler to start the motor
- */
- return FAILED;
break;
case UNIT_ATTENTION:
if (sense_hdr->asc == 0x29 && sense_hdr->ascq == 0x00)
@@ -517,9 +499,16 @@ static int alua_rtpg(struct scsi_device *sdev, struct alua_dh_data *h, int wait_
h->flags |= ALUA_RTPG_EXT_HDR_UNSUPP;
goto retry;
}
-
- err = alua_check_sense(sdev, &sense_hdr);
- if (err == ADD_TO_MLQUEUE && time_before(jiffies, expiry)) {
+ /*
+ * Retry on ALUA state transition or if any
+ * UNIT ATTENTION occurred.
+ */
+ if (sense_hdr.sense_key == NOT_READY &&
+ sense_hdr.asc == 0x04 && sense_hdr.ascq == 0x0a)
+ err = SCSI_DH_RETRY;
+ else if (sense_hdr.sense_key == UNIT_ATTENTION)
+ err = SCSI_DH_RETRY;
+ if (err == SCSI_DH_RETRY && time_before(jiffies, expiry)) {
sdev_printk(KERN_ERR, sdev, "%s: rtpg retry\n",
ALUA_DH_NAME);
scsi_print_sense_hdr(sdev, ALUA_DH_NAME, &sense_hdr);