From: Hannes Reinecke <hare@suse.de>
Date: Thu, 5 Jun 2014 08:24:10 +0200
Subject: scsi: Handle power-on reset unit attention
References: FATE#315120, bnc#852358
Patch-Mainline: submitted to linux-scsi
As per SAM there is a status precedence, with any sense code 29/XX
taking second place just after an ACA ACTIVE status.
Additionally, each target might prefer to not queue any unit
attention conditions, but just report one.
Due to the above this will be that one with the highest precedence.
This results in the sense code 29/XX effectively overwriting any
other unit attention.
Hence we should report the power-on reset to userland so that
it can take appropriate action.
Signed-off-by: Hannes Reinecke <hare@suse.de>
---
drivers/scsi/scsi_error.c | 6 ++++++
drivers/scsi/scsi_lib.c | 4 ++++
include/scsi/scsi_device.h | 3 ++-
3 files changed, 12 insertions(+), 1 deletion(-)
diff --git a/drivers/scsi/scsi_error.c b/drivers/scsi/scsi_error.c
index ef90518..29068d4 100644
--- a/drivers/scsi/scsi_error.c
+++ b/drivers/scsi/scsi_error.c
@@ -418,6 +418,12 @@ static void scsi_report_sense(struct scsi_device *sdev,
"threshold.\n");
}
+ if (sshdr->asc == 0x29) {
+ evt_type = SDEV_EVT_POWER_ON_RESET_OCCURRED;
+ sdev_printk(KERN_WARNING, sdev,
+ "Power-on or device reset occurred\n");
+ }
+
if (sshdr->asc == 0x2a && sshdr->ascq == 0x01) {
evt_type = SDEV_EVT_MODE_PARAMETER_CHANGE_REPORTED;
sdev_printk(KERN_WARNING, sdev,
diff --git a/drivers/scsi/scsi_lib.c b/drivers/scsi/scsi_lib.c
index d46193a..0ce2f98 100644
--- a/drivers/scsi/scsi_lib.c
+++ b/drivers/scsi/scsi_lib.c
@@ -2717,6 +2717,9 @@ static void scsi_evt_emit(struct scsi_device *sdev, struct scsi_event *evt)
case SDEV_EVT_ALUA_STATE_CHANGE_REPORTED:
envp[idx++] = "SDEV_UA=ASYMMETRIC_ACCESS_STATE_CHANGED";
break;
+ case SDEV_EVT_POWER_ON_RESET_OCCURRED:
+ envp[idx++] = "SDEV_UA=POWER_ON_RESET_OCCURRED";
+ break;
default:
/* do nothing */
break;
@@ -2821,6 +2824,7 @@ struct scsi_event *sdev_evt_alloc(enum scsi_device_event evt_type,
case SDEV_EVT_MODE_PARAMETER_CHANGE_REPORTED:
case SDEV_EVT_LUN_CHANGE_REPORTED:
case SDEV_EVT_ALUA_STATE_CHANGE_REPORTED:
+ case SDEV_EVT_POWER_ON_RESET_OCCURRED:
default:
/* do nothing */
break;
diff --git a/include/scsi/scsi_device.h b/include/scsi/scsi_device.h
index a5fc682..dbfd594 100644
--- a/include/scsi/scsi_device.h
+++ b/include/scsi/scsi_device.h
@@ -58,9 +58,10 @@ enum scsi_device_event {
SDEV_EVT_MODE_PARAMETER_CHANGE_REPORTED, /* 2A 01 UA reported */
SDEV_EVT_LUN_CHANGE_REPORTED, /* 3F 0E UA reported */
SDEV_EVT_ALUA_STATE_CHANGE_REPORTED, /* 2A 06 UA reported */
+ SDEV_EVT_POWER_ON_RESET_OCCURRED, /* 29 00 UA reported */
SDEV_EVT_FIRST = SDEV_EVT_MEDIA_CHANGE,
- SDEV_EVT_LAST = SDEV_EVT_ALUA_STATE_CHANGE_REPORTED,
+ SDEV_EVT_LAST = SDEV_EVT_POWER_ON_RESET_OCCURRED,
SDEV_EVT_MAXBITS = SDEV_EVT_LAST + 1
};
--
1.8.5.6