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block: require blk_rq_prep_clone() be given an initialized clone request

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Prepare to allow blk_rq_prep_clone() to accept clone requests that were
allocated from blk-mq request queues.  As such the blk_rq_prep_clone()
caller must first initialize the clone request.

Signed-off-by: Keith Busch <keith.busch@intel.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
This commit is contained in:
Keith Busch 2014-10-17 17:46:35 -06:00 committed by Jens Axboe
parent 24391c0dc5
commit febf71588c
2 changed files with 1 additions and 2 deletions
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2
block/blk-core.c
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@ -2945,8 +2945,6 @@ int blk_rq_prep_clone(struct request *rq, struct request *rq_src,
if (!bs)
bs = fs_bio_set;
blk_rq_init(NULL, rq);
__rq_for_each_bio(bio_src, rq_src) {
bio = bio_clone_fast(bio_src, gfp_mask, bs);
if (!bio)

1
drivers/md/dm.c
View File

@ -1719,6 +1719,7 @@ static int setup_clone(struct request *clone, struct request *rq,
{
int r;
blk_rq_init(NULL, rq);
r = blk_rq_prep_clone(clone, rq, tio->md->bs, GFP_ATOMIC,
dm_rq_bio_constructor, tio);
if (r)