[PATCH 4.19 26/44] dm: call blk_queue_split() to impose device limits on bios

Greg Kroah-Hartman
2018-12-18T16:41:22Z

From: Mike Snitzer <snitzer@redhat.com>

commit 89f5fa47476eda56402e29fff3c5097f5c2a1e19 upstream.

Otherwise the incoming bios, of various types, won't be shaped based on
the DM device's advertised limits.

Depends-on: af67c31fba ("blk: remove bio_set arg from blk_queue_split()")
Fixes: 744889b7cb ("block: don't deal with discard limit in blkdev_issue_discard()")
Cc: stable@vger.kernel.org
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
drivers/md/dm.c | 2 ++
1 file changed, 2 insertions(+)

--- a/drivers/md/dm.c
+++ b/drivers/md/dm.c
@@ -1592,6 +1592,8 @@ static blk_qc_t __split_and_process_bio(
return ret;
}

+ blk_queue_split(md->queue, &bio);
+
init_clone_info(&ci, md, map, bio);

if (bio->bi_opf & REQ_PREFLUSH) {