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dm: fix clone_bio() to trigger blk_recount_segments()

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DM's clone_bio() now benefits from using bio_trim() by fixing the fact
that clone_bio() wasn't clearing BIO_SEG_VALID like bio_trim() does;
which triggers blk_recount_segments() via bio_phys_segments().

Reviewed-by: Ming Lei <ming.lei@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
This commit is contained in:
Mike Snitzer 2019-01-16 18:53:26 -05:00
parent d445bd9cec
commit 57c36519e4
1 changed files with 2 additions and 6 deletions
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8
drivers/md/dm.c
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@ -1320,7 +1320,7 @@ static int clone_bio(struct dm_target_io *tio, struct bio *bio,
__bio_clone_fast(clone, bio);
if (unlikely(bio_integrity(bio) != NULL)) {
if (bio_integrity(bio)) {
int r;
if (unlikely(!dm_target_has_integrity(tio->ti->type) &&
@ -1336,11 +1336,7 @@ static int clone_bio(struct dm_target_io *tio, struct bio *bio,
return r;
}
bio_advance(clone, to_bytes(sector - clone->bi_iter.bi_sector));
clone->bi_iter.bi_size = to_bytes(len);
if (unlikely(bio_integrity(bio) != NULL))
bio_integrity_trim(clone);
bio_trim(clone, sector - clone->bi_iter.bi_sector, len);
return 0;
}