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blk-map: call blk_queue_bounce from blk_rq_append_bio

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This makes moves the knowledge about bouncing out of the callers into the
block core (just like we do for the normal I/O path), and allows to unexport
blk_queue_bounce.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Christoph Hellwig 2017-06-27 12:13:21 -06:00 committed by Jens Axboe
parent e442cbf910
commit caa4b02476
3 changed files with 4 additions and 10 deletions
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7
block/blk-map.c
View file

@ -16,6 +16,8 @@
*/
int blk_rq_append_bio(struct request *rq, struct bio *bio)
{
blk_queue_bounce(rq->q, &bio);
if (!rq->bio) {
blk_rq_bio_prep(rq->q, rq, bio);
} else {
@ -72,15 +74,13 @@ static int __blk_rq_map_user_iov(struct request *rq,
map_data->offset += bio->bi_iter.bi_size;
orig_bio = bio;
blk_queue_bounce(q, &bio);
/*
* We link the bounce buffer in and could have to traverse it
* later so we have to get a ref to prevent it from being freed
*/
bio_get(bio);
ret = blk_rq_append_bio(rq, bio);
bio_get(bio);
if (ret) {
bio_endio(bio);
__blk_rq_unmap_user(orig_bio);
@ -249,7 +249,6 @@ int blk_rq_map_kern(struct request_queue *q, struct request *rq, void *kbuf,
return ret;
}
blk_queue_bounce(q, &rq->bio);
return 0;
}
EXPORT_SYMBOL(blk_rq_map_kern);

2
block/bounce.c
View file

@ -284,5 +284,3 @@ void blk_queue_bounce(struct request_queue *q, struct bio **bio_orig)
*/
__blk_queue_bounce(q, bio_orig, pool);
}
EXPORT_SYMBOL(blk_queue_bounce);

5
drivers/scsi/osd/osd_initiator.c
View file

@ -1576,10 +1576,7 @@ static struct request *_make_request(struct request_queue *q, bool has_write,
return req;
for_each_bio(bio) {
struct bio *bounce_bio = bio;
blk_queue_bounce(req->q, &bounce_bio);
ret = blk_rq_append_bio(req, bounce_bio);
ret = blk_rq_append_bio(req, bio);
if (ret)
return ERR_PTR(ret);
}