dm: test return value for DM_MAPIO_SUBMITTED

In properly written code we should not assume that DM_MAPIO_SUBMITTED is zero. We should test the return value for DM_MAPIO_SUBMITTED rather than testing it for zero. Signed-off-by: Mikulas Patocka <[email protected]> Signed-off-by: Mike Snitzer <[email protected]>
ambv · Aug 12, 2015 · ab37844 · ab37844
1 parent 4fb9aa5
commit ab37844
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/drivers/md/dm.c b/drivers/md/dm.c
@@ -1466,7 +1466,7 @@ static void __map_bio(struct dm_target_io *tio)
 		md = tio->io->md;
 		dec_pending(tio->io, r);
 		free_tio(md, tio);
-	} else if (r) {
+	} else if (r != DM_MAPIO_SUBMITTED) {
 		DMWARN("unimplemented target map return value: %d", r);
 		BUG();
 	}