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block: loop: don't handle REQ_FUA explicitly 

block core handles REQ_FUA by its flush state machine, so
won't do it in loop explicitly.

Signed-off-by: Ming Lei <ming.lei@canonical.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
This commit is contained in:
Ming Lei 2014-12-31 13:23:00 +00:00 committed by Jens Axboe
parent cf655d9534
commit af65aa8ea7
1 changed files with 3 additions and 11 deletions
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14
drivers/block/loop.c
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@ -459,23 +459,15 @@ static int do_req_filebacked(struct loop_device *lo, struct request *rq)
pos = ((loff_t) blk_rq_pos(rq) << 9) + lo->lo_offset;
if (rq->cmd_flags & REQ_WRITE) {
if (rq->cmd_flags & REQ_FLUSH)
ret = lo_req_flush(lo, rq);
if (rq->cmd_flags & REQ_DISCARD) {
else if (rq->cmd_flags & REQ_DISCARD)
ret = lo_discard(lo, rq, pos);
goto out;
}
ret = lo_send(lo, rq, pos);
if ((rq->cmd_flags & REQ_FUA) && !ret)
ret = lo_req_flush(lo, rq);
else
ret = lo_send(lo, rq, pos);
} else
ret = lo_receive(lo, rq, lo->lo_blocksize, pos);
out:
return ret;
}