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loop: don't try to use AIO for discards 

Fix a fat-fingered conversion to the req_op accessors, and also
use a switch statement to make it more obvious what is being checked.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reported-by: Dave Chinner <david@fromorbit.com>
Fixes: c2df40 ("drivers: use req op accessor");
Reviewed-by: Ming Lei <ming.lei@canonical.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
This commit is contained in:
Christoph Hellwig 2016-08-04 16:10:00 +02:00 committed by Jens Axboe
parent c0f3fd2b38
commit f0225cacfe
1 changed files with 8 additions and 4 deletions
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12
drivers/block/loop.c
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@ -1659,11 +1659,15 @@ static int loop_queue_rq(struct blk_mq_hw_ctx *hctx,
if (lo->lo_state != Lo_bound)
return -EIO;
if (lo->use_dio && (req_op(cmd->rq) != REQ_OP_FLUSH ||
req_op(cmd->rq) == REQ_OP_DISCARD))
cmd->use_aio = true;
else
switch (req_op(cmd->rq)) {
case REQ_OP_FLUSH:
case REQ_OP_DISCARD:
cmd->use_aio = false;
break;
default:
cmd->use_aio = lo->use_dio;
break;
}
queue_kthread_work(&lo->worker, &cmd->work);