dm: fix clone_bio() to trigger blk_recount_segments()
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>
diff --git a/drivers/md/dm.c b/drivers/md/dm.c
index d67c95e..fcb97b0 100644
--- a/drivers/md/dm.c
+++ b/drivers/md/dm.c
@@ -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;
}