If a virtqueue_get_buf() call returns a NULL pointer a possibly endless while loop should be avoided by checking for a broken virtqueue.
Signed-off-by: Heinz Graalfs <[email protected]> --- drivers/net/virtio_net.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c index 6584e3a..f092b9d 100644 --- a/drivers/net/virtio_net.c +++ b/drivers/net/virtio_net.c @@ -802,7 +802,8 @@ static bool virtnet_send_command(struct virtnet_info *vi, u8 class, u8 cmd, /* Spin for a response, the kick causes an ioport write, trapping * into the hypervisor, so the request should be handled immediately. */ - while (!virtqueue_get_buf(vi->cvq, &tmp)) + while (!virtqueue_get_buf(vi->cvq, &tmp) && + !virtqueue_is_broken(vi->cvq)) cpu_relax(); return status == VIRTIO_NET_OK; -- 1.8.3.1 _______________________________________________ Virtualization mailing list [email protected] https://lists.linuxfoundation.org/mailman/listinfo/virtualization
