virtio_blk: verify if queue is broken after virtqueue_get_buf()

In case virtqueue_get_buf() returned with a NULL pointer verify if the virtqueue is broken in order to leave while loop. Signed-off-by: Heinz Graalfs <graalfs@linux.vnet.ibm.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
git-mirror · Oct 29, 2013 · 7f03b17 · 7f03b17
1 parent b3b32c9
commit 7f03b17
Showing 1 changed file with 2 additions and 0 deletions.
diff --git a/drivers/block/virtio_blk.c b/drivers/block/virtio_blk.c
@@ -292,6 +292,8 @@ static void virtblk_done(struct virtqueue *vq)
 				req_done = true;
 			}
 		}
+		if (unlikely(virtqueue_is_broken(vq)))
+			break;
 	} while (!virtqueue_enable_cb(vq));
 	/* In case queue is stopped waiting for more buffers. */
 	if (req_done)