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[SCSI] scsi_dh_alua: Attach to UNAVAILABLE/OFFLINE AAS devices 

The SCSI ALUA handler currently fails to attach to devices
reporting an UNAVAILABLE/OFFLINE AAS. But given that an
UNAVAILABLE/OFFLINE AAS can transition to other states
like ACTIVE/OPTIMIZED, ACTIVE/NON-OPTIMIZED, etc. as per
SPC4, this ALUA handler behavior should be rectified so
as to attach to devices which also report an
UNAVAILABLE/OFFLINE AAS.

Signed-off-by: Martin George <marting@netapp.com>
Reviewed-by: Mike Christie <michaelc@cs.wisc.edu>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
This commit is contained in:
Martin George 2011-04-26 18:27:05 +05:30 committed by James Bottomley
parent cbc78ae73b
commit c0d289b3e5
1 changed files with 1 additions and 1 deletions
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2
drivers/scsi/device_handler/scsi_dh_alua.c
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@ -782,7 +782,7 @@ static int alua_bus_attach(struct scsi_device *sdev)
h->sdev = sdev;
err = alua_initialize(sdev, h);
if (err != SCSI_DH_OK)
if ((err != SCSI_DH_OK) && (err != SCSI_DH_DEV_OFFLINED))
goto failed;
if (!try_module_get(THIS_MODULE))