[PATCH] dm-integrity: fix wrong fallthrough in integrity_bio_wait

If dm_integrity_map_inline returned DM_MAPIO_KILL, the code would set
status BLK_STS_IOERR and then incorrectly fall through and submit the
bio. Luckily, dm_integrity_map_inline can't return DM_MAPIO_KILL at this
point, so the bug is just theoretical.

Signed-off-by: Mikulas Patocka <[email protected]>
Assisted-by: Claude:claude-opus-4.6

---
 drivers/md/dm-integrity.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

Index: linux-2.6/drivers/md/dm-integrity.c
===================================================================
--- linux-2.6.orig/drivers/md/dm-integrity.c	2026-07-13 21:00:46.000000000 +0200
+++ linux-2.6/drivers/md/dm-integrity.c	2026-07-13 21:00:46.000000000 +0200
@@ -2782,7 +2782,8 @@ static void integrity_bio_wait(struct wo
 		switch (r) {
 			case DM_MAPIO_KILL:
 				bio->bi_status = BLK_STS_IOERR;
-				fallthrough;
+				bio_endio(bio);
+				return;
 			case DM_MAPIO_REMAPPED:
 				submit_bio_noacct(bio);
 				fallthrough;