tree 52e0042dac2c8651641987da49163908c3305e74
parent 921ce7f5786052749a22a75780f5ce1a456bcdc6
author Song Liu <songliubraving@fb.com> 1419979578 -0800
committer Christoph Hellwig <hch@lst.de> 1420814659 +0100

ses: Add power_status to SES device slot

Add power_status to SES device slot, so we can power on/off the
HDDs behind the enclosure.

Check firmware status in ses_set_* before sending control pages to
firmware.

Signed-off-by: Song Liu <songliubraving@fb.com>
Acked-by: Dan Williams <dan.j.williams@intel.com>
Reviewed-by: Jens Axboe <axboe@fb.com>
Cc: Hannes Reinecke <hare@suse.de>
Signed-off-by: Christoph Hellwig <hch@lst.de>