virtio_net: don't crash if virtqueue is broken.



A bad implementation of virtio might cause us to mark the virtqueue
broken: we'll dev_err() in that case, and the device is useless, but
let's not BUG_ON().

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

parent 1f74ef0f

drivers/net/virtio_net.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -938,7 +938,7 @@ static bool virtnet_send_command(struct virtnet_info *vi, u8 class, u8 cmd,
		sgs[out_num] = &stat;

		BUG_ON(out_num + 1 > ARRAY_SIZE(sgs));
		BUG_ON(virtqueue_add_sgs(vi->cvq, sgs, out_num, 1, vi, GFP_ATOMIC) < 0);
		virtqueue_add_sgs(vi->cvq, sgs, out_num, 1, vi, GFP_ATOMIC);

		if (unlikely(!virtqueue_kick(vi->cvq)))
		return status == VIRTIO_NET_OK;