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authorMoger, Babu <Babu.Moger@netapp.com>2011-12-21 18:01:37 -0500
committerJames Bottomley <JBottomley@Parallels.com>2012-01-10 17:01:24 -0600
commit410f02d813212eef1dedfcfd43460dd11a0ff707 (patch)
tree214943cd6ebd3f89084913f7dc705c2d1253fcc1 /drivers/scsi/device_handler
parent5b7db7af522d9f281ff8bf540d2b5cbea2206b27 (diff)
[SCSI] scsi_dh_alua: Retry the check-condition in case Mode Parameters Changed
This patch adds a check-condition in scsi_dh_alua handler for a retry. Sometimes, I have seen attach failing due to this check-condition with following error messages on NetApp E series storage. Dec 7 15:31:01 nilgiris kernel: [102979.696673] scsi 3:0:2:9: alua: port group 00 rel port 01 Dec 7 15:31:01 nilgiris kernel: [102979.697082] scsi 3:0:2:9: alua: rtpg failed with 8000002 Dec 7 15:31:01 nilgiris kernel: [102979.697086] scsi 3:0:2:9: alua: rtpg sense code 06/2a/01 Dec 7 15:31:01 nilgiris kernel: [102979.697088] scsi 3:0:2:9: alua: not attached Signed-off-by: Babu Moger <babu.moger@netapp.com> Signed-off-by: James Bottomley <JBottomley@Parallels.com>
Diffstat (limited to 'drivers/scsi/device_handler')
-rw-r--r--drivers/scsi/device_handler/scsi_dh_alua.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/scsi/device_handler/scsi_dh_alua.c b/drivers/scsi/device_handler/scsi_dh_alua.c
index 4ef021291a4..04c5cea47a2 100644
--- a/drivers/scsi/device_handler/scsi_dh_alua.c
+++ b/drivers/scsi/device_handler/scsi_dh_alua.c
@@ -466,6 +466,11 @@ 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 == 0x2a && sense_hdr->ascq == 0x01)
+ /*
+ * Mode Parameters Changed
+ */
+ return ADD_TO_MLQUEUE;
if (sense_hdr->asc == 0x2a && sense_hdr->ascq == 0x06)
/*
* ALUA state changed