[PATCH 1/2][RESEND] scsi_dh_alua: ALUA check sense should retry device internal reset unit attention

[PATCH 1/2][RESEND] scsi_dh_alua: ALUA check sense should retry device internal reset unit attention

[Stewart, Sean]

When the scsi_dh_alua handler issues an RTPG during initialization, if it gets 0x06/0x29/0x04 as the sense,
it will fail to attach the handler.  NetApp E-Series returns 0x29/0x00 for power on, and 0x29/0x04 for
conditions that cause the controller to reboot again.  These conditions should be treated identically within
the handler.

Signed-off-by: Sean Stewart <Sean.Stewart@netapp.com>
---
 drivers/scsi/device_handler/scsi_dh_alua.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/scsi/device_handler/scsi_dh_alua.c b/drivers/scsi/device_handler/scsi_dh_alua.c
index 68adb89..78205cc 100644
--- a/drivers/scsi/device_handler/scsi_dh_alua.c
+++ b/drivers/scsi/device_handler/scsi_dh_alua.c
@@ -481,6 +481,11 @@ static int alua_check_sense(struct scsi_device *sdev,
 			 * Power On, Reset, or Bus Device Reset, just retry.
 			 */
 			return ADD_TO_MLQUEUE;
+		if (sense_hdr->asc == 0x29 && sense_hdr->ascq == 0x04)
+			/*
+			 * Device internal reset
+			 */
+			return ADD_TO_MLQUEUE;
 		if (sense_hdr->asc == 0x2a && sense_hdr->ascq == 0x01)
 			/*
 			 * Mode Parameters Changed
-- 
1.8.3.1

Re: [PATCH 1/2][RESEND] scsi_dh_alua: ALUA check sense should retry device internal reset unit attention

[Hannes Reinecke]

On 10/15/2013 05:52 PM, Stewart, Sean wrote:
> When the scsi_dh_alua handler issues an RTPG during initialization, if it gets 0x06/0x29/0x04 as the sense,
> it will fail to attach the handler.  NetApp E-Series returns 0x29/0x00 for power on, and 0x29/0x04 for
> conditions that cause the controller to reboot again.  These conditions should be treated identically within
> the handler.
> 
> Signed-off-by: Sean Stewart <Sean.Stewart@netapp.com>
Acked-by: Hannes Reinecke <hare@suse.de>

Cheers,

Hannes
-- 
Dr. Hannes Reinecke		      zSeries & Storage
hare@suse.de			      +49 911 74053 688
SUSE LINUX Products GmbH, Maxfeldstr. 5, 90409 Nürnberg
GF: J. Hawn, J. Guild, F. Imendörffer, HRB 16746 (AG Nürnberg)
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