CHROMIUM: md: dm-verity: Fix to avoid a deadlock in dm-bufio

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

diff --git a/drivers/md/dm-bufio.c b/drivers/md/dm-bufio.c
index cc06a1e..c0fc827 100644 (file)
--- a/drivers/md/dm-bufio.c
+++ b/drivers/md/dm-bufio.c
@@ -1029,6 +1029,8 @@ 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);