dm verity: avoid deadlock

[karo-tx-linux.git] / drivers / md / dm-bufio.c

diff --git a/drivers/md/dm-bufio.c b/drivers/md/dm-bufio.c
index 3c955e10a618c2487422efa8063d1f9924a483cc..c6083132c4b8ccaf21c7addb61cf8596165bf915 100644 (file)
--- a/drivers/md/dm-bufio.c
+++ b/drivers/md/dm-bufio.c
@@ -1025,6 +1025,8 @@ void dm_bufio_prefetch(struct dm_bufio_client *c,
 {
        struct blk_plug plug;
 
+       BUG_ON(dm_bufio_in_request());
+
        blk_start_plug(&plug);
        dm_bufio_lock(c);