diff options
Diffstat (limited to 'drivers/scsi/device_handler/scsi_dh_alua.c')
| -rw-r--r-- | drivers/scsi/device_handler/scsi_dh_alua.c | 26 |
1 files changed, 23 insertions, 3 deletions
diff --git a/drivers/scsi/device_handler/scsi_dh_alua.c b/drivers/scsi/device_handler/scsi_dh_alua.c index ac6fddf99e9..5a344885696 100644 --- a/drivers/scsi/device_handler/scsi_dh_alua.c +++ b/drivers/scsi/device_handler/scsi_dh_alua.c @@ -178,7 +178,8 @@ done: * submit_rtpg - Issue a REPORT TARGET GROUP STATES command * @sdev: sdev the command should be sent to */ -static unsigned submit_rtpg(struct scsi_device *sdev, struct alua_dh_data *h) +static unsigned submit_rtpg(struct scsi_device *sdev, struct alua_dh_data *h, + bool rtpg_ext_hdr_req) { struct request *rq; int err = SCSI_DH_RES_TEMP_UNAVAIL; @@ -189,7 +190,10 @@ static unsigned submit_rtpg(struct scsi_device *sdev, struct alua_dh_data *h) /* Prepare the command. */ rq->cmd[0] = MAINTENANCE_IN; - rq->cmd[1] = MI_REPORT_TARGET_PGS | MI_EXT_HDR_PARAM_FMT; + if (rtpg_ext_hdr_req) + rq->cmd[1] = MI_REPORT_TARGET_PGS | MI_EXT_HDR_PARAM_FMT; + else + rq->cmd[1] = MI_REPORT_TARGET_PGS; rq->cmd[6] = (h->bufflen >> 24) & 0xff; rq->cmd[7] = (h->bufflen >> 16) & 0xff; rq->cmd[8] = (h->bufflen >> 8) & 0xff; @@ -522,6 +526,7 @@ static int alua_rtpg(struct scsi_device *sdev, struct alua_dh_data *h) int len, k, off, valid_states = 0; unsigned char *ucp; unsigned err; + bool rtpg_ext_hdr_req = 1; unsigned long expiry, interval = 1000; unsigned int tpg_desc_tbl_off; unsigned char orig_transition_tmo; @@ -532,7 +537,7 @@ static int alua_rtpg(struct scsi_device *sdev, struct alua_dh_data *h) expiry = round_jiffies_up(jiffies + h->transition_tmo * HZ); retry: - err = submit_rtpg(sdev, h); + err = submit_rtpg(sdev, h, rtpg_ext_hdr_req); if (err == SCSI_DH_IO && h->senselen > 0) { err = scsi_normalize_sense(h->sense, SCSI_SENSE_BUFFERSIZE, @@ -540,6 +545,21 @@ static int alua_rtpg(struct scsi_device *sdev, struct alua_dh_data *h) if (!err) return SCSI_DH_IO; + /* + * submit_rtpg() has failed on existing arrays + * when requesting extended header info, and + * the array doesn't support extended headers, + * even though it shouldn't according to T10. + * The retry without rtpg_ext_hdr_req set + * handles this. + */ + if (rtpg_ext_hdr_req == 1 && + sense_hdr.sense_key == ILLEGAL_REQUEST && + sense_hdr.asc == 0x24 && sense_hdr.ascq == 0) { + rtpg_ext_hdr_req = 0; + goto retry; + } + err = alua_check_sense(sdev, &sense_hdr); if (err == ADD_TO_MLQUEUE && time_before(jiffies, expiry)) goto retry; |