scsi_dh_alua: Send TEST UNIT READY to poll for transitioning

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Sending a 'REPORT TARGET PORT GROUP' command is a costly operation,
as the array has to gather information about all ports.
So instead of using RTPG to poll for a status update when a port
is in transitioning we should be sending a TEST UNIT READY, and
wait for the sense code to report success.

Reviewed-by: Bart Van Assche <bart.vanassche@sandisk.com>
Reviewed-by: Ewan Milne <emilne@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

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Hannes Reinecke 2016-02-19 09:17:15 +01:00 • committed by Martin K. Petersen

parent c57168a1e1

commit 9d2c303952

1 changed files with 38 additions and 0 deletions

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drivers/scsi/device_handler/scsi_dh_alua.c

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