virtio: net: make it clear that virtqueue_add_buf() no longer returns > 0

We simplified virtqueue_add_buf(), make it clear in the callers.

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

1 files changed, 1 insertions, 1 deletions

diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c
index 7c7f5a94ca4f..62898910708a 100644
--- a/drivers/net/virtio_net.c
+++ b/drivers/net/virtio_net.c
@@ -635,7 +635,7 @@ static netdev_tx_t start_xmit(struct sk_buff *skb, struct net_device *dev)
         err = xmit_skb(vi, skb);
 
         /* This should not happen! */
-        if (unlikely(err < 0)) {
+        if (unlikely(err)) {
                 dev->stats.tx_fifo_errors++;
                 if (net_ratelimit())
                         dev_warn(&dev->dev,