[SCSI] qla4xxx: unblock iscsi session after setting ddb state online.
Once the device goes *missing*, driver blocks the session ie iscsi_block_session() to stall the I/O. So after device comes back *online*, driver needs to unblock the session ie iscsi_unblock_session(), else I/Os will fail even if ddb_state is ONLINE. Signed-off-by: NVikas Chaudhary <vikas.chaudhary@qlogic.com> Signed-off-by: NRavi Anand <ravi.anand@qlogic.com> Reviewed-by: NMike Christie <michaelc@cs.wisc.edu> Signed-off-by: NJames Bottomley <James.Bottomley@suse.de>
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