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[SCSI] scsi_dh_alua: ALUA check sense should retry device internal reset unit attention 

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>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
This commit is contained in:
Stewart, Sean 2013-10-15 15:52:39 +00:00 committed by James Bottomley
parent 0f3c7b99f3
commit c20ee7b56e
1 changed files with 5 additions and 0 deletions
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5
drivers/scsi/device_handler/scsi_dh_alua.c
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@ -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