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2020 Aug 20
0
[PATCH AUTOSEL 4.4 08/10] virtio_ring: Avoid loop when vq is broken in virtqueue_poll
...mst at redhat.com> Acked-by: Jason Wang <jasowang at redhat.com> Signed-off-by: Sasha Levin <sashal at kernel.org> --- drivers/virtio/virtio_ring.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/virtio/virtio_ring.c b/drivers/virtio/virtio_ring.c index a01a41a412693..6b3565feddb21 100644 --- a/drivers/virtio/virtio_ring.c +++ b/drivers/virtio/virtio_ring.c @@ -603,6 +603,9 @@ bool virtqueue_poll(struct virtqueue *_vq, unsigned last_used_idx) { struct vring_virtqueue *vq = to_vvq(_vq); + if (unlikely(vq->broken)) + return false; + virtio_mb(vq->weak_barriers);...