tree 8ebc862034aec40f4ecc59d65ea31ef3787cf27f
parent da1e284919b0b99c5bf0618b6c98cbaf2c17e62e
author Matias Bjorling <m@bjorling.me> 1457013999 +0100
committer Jens Axboe <axboe@fb.com> 1458349838 -0700

nvme: lightnvm: return ppa completion status

PPAs sent to device is separately acknowledge in a 64bit status
variable. The status is stored in DW0 and DW1 of the completion queue
entry. Store this status inside the nvm_rq for further processing.

This can later be used to implement retry techniques for failed writes
and reads.

Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Matias Bjørling <m@bjorling.me>
Signed-off-by: Jens Axboe <axboe@fb.com>