Commit ff36ab34 authored by Mike Snitzer's avatar Mike Snitzer

dm: remove request-based logic from make_request_fn wrapper

The old dm_request() method used for q->make_request_fn had a branch for
request-based DM support but it isn't needed given that
dm_init_request_based_queue() sets it to the standard blk_queue_bio()
anyway.

Cleanup dm_init_md_queue() to be DM device-type agnostic and have
dm_setup_md_queue() properly finish queue setup based on DM device-type
(bio-based vs request-based).

A followup block patch can be made to remove the export for
blk_queue_bio() now that DM no longer calls it directly.
Signed-off-by: default avatarMike Snitzer <snitzer@redhat.com>
parent d56b9b28
......@@ -1693,7 +1693,7 @@ static int dm_merge_bvec(struct request_queue *q,
* The request function that just remaps the bio built up by
* dm_merge_bvec.
*/
static void _dm_request(struct request_queue *q, struct bio *bio)
static void dm_make_request(struct request_queue *q, struct bio *bio)
{
int rw = bio_data_dir(bio);
struct mapped_device *md = q->queuedata;
......@@ -1725,16 +1725,6 @@ int dm_request_based(struct mapped_device *md)
return blk_queue_stackable(md->queue);
}
static void dm_request(struct request_queue *q, struct bio *bio)
{
struct mapped_device *md = q->queuedata;
if (dm_request_based(md))
blk_queue_bio(q, bio);
else
_dm_request(q, bio);
}
static void dm_dispatch_clone_request(struct request *clone, struct request *rq)
{
int r;
......@@ -2100,9 +2090,8 @@ static void dm_init_md_queue(struct mapped_device *md)
md->queue->queuedata = md;
md->queue->backing_dev_info.congested_fn = dm_any_congested;
md->queue->backing_dev_info.congested_data = md;
blk_queue_make_request(md->queue, dm_request);
blk_queue_bounce_limit(md->queue, BLK_BOUNCE_ANY);
blk_queue_merge_bvec(md->queue, dm_merge_bvec);
}
/*
......@@ -2335,7 +2324,7 @@ int dm_queue_merge_is_compulsory(struct request_queue *q)
if (!q->merge_bvec_fn)
return 0;
if (q->make_request_fn == dm_request) {
if (q->make_request_fn == dm_make_request) {
dev_md = q->queuedata;
if (test_bit(DMF_MERGE_IS_OPTIONAL, &dev_md->flags))
return 0;
......@@ -2545,9 +2534,15 @@ static int dm_init_request_based_queue(struct mapped_device *md)
*/
int dm_setup_md_queue(struct mapped_device *md)
{
if (dm_md_type_request_based(md) && !dm_init_request_based_queue(md)) {
DMWARN("Cannot initialize queue for request-based mapped device");
return -EINVAL;
if (dm_md_type_request_based(md)) {
if (!dm_init_request_based_queue(md)) {
DMWARN("Cannot initialize queue for request-based mapped device");
return -EINVAL;
}
} else {
/* bio-based specific initialization */
blk_queue_make_request(md->queue, dm_make_request);
blk_queue_merge_bvec(md->queue, dm_merge_bvec);
}
return 0;
......
Markdown is supported
0%
or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment