X-Git-Url: https://git.kernelconcepts.de/?a=blobdiff_plain;f=drivers%2Fvirtio%2Fvirtio_ring.c;h=4d08f45a9c29aeba18fe4c174bce0a644a090d57;hb=b55b39020289f225bf2455349ce1a67372a0baa9;hp=1e443629f76d725f7223e4d9234b0cf47e942b0e;hpb=11da37b26301be772c289c5406aec347ad140bd6;p=karo-tx-linux.git

diff --git a/drivers/virtio/virtio_ring.c b/drivers/virtio/virtio_ring.c
index 1e443629f76d..4d08f45a9c29 100644
--- a/drivers/virtio/virtio_ring.c
+++ b/drivers/virtio/virtio_ring.c
@@ -865,4 +865,19 @@ bool virtqueue_is_broken(struct virtqueue *_vq)
 }
 EXPORT_SYMBOL_GPL(virtqueue_is_broken);
 
+/*
+ * This should prevent the device from being used, allowing drivers to
+ * recover.  You may need to grab appropriate locks to flush.
+ */
+void virtio_break_device(struct virtio_device *dev)
+{
+	struct virtqueue *_vq;
+
+	list_for_each_entry(_vq, &dev->vqs, list) {
+		struct vring_virtqueue *vq = to_vvq(_vq);
+		vq->broken = true;
+	}
+}
+EXPORT_SYMBOL_GPL(virtio_break_device);
+
 MODULE_LICENSE("GPL");