[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: NMartin George <marting@netapp.com> Reviewed-by: NMike Christie <michaelc@cs.wisc.edu> Signed-off-by: NJames Bottomley <James.Bottomley@suse.de>
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