Commit 5ef82752 authored May 02, 2008 by Rusty Russell

virtio: ignore corrupted virtqueues rather than spinning.



A corrupt virtqueue (caused by the other end screwing up) can have
strange results such as a driver spinning: just bail when we try to
get a buffer from a known-broken queue.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

parent 886c35fb

drivers/virtio/virtio_ring.c

+5 −0

Original line number	Diff line number	Diff line
		@@ -184,6 +184,11 @@ static void vring_get_buf(struct virtqueue _vq, unsigned int *len)

		START_USE(vq);

		if (unlikely(vq->broken)) {
		END_USE(vq);
		return NULL;
		}

		if (!more_used(vq)) {
		pr_debug("No more buffers in queue\n");
		END_USE(vq);