virtio net uses the number of sg entries to check for TX ring capacity freed. But this gives incorrect results when indirect buffers are used. Use the new capacity API instead. Signed-off-by: Michael S. Tsirkin <mst@xxxxxxxxxx> --- drivers/net/virtio_net.c | 9 ++++----- 1 files changed, 4 insertions(+), 5 deletions(-) diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c index f685324..f33c92b 100644 --- a/drivers/net/virtio_net.c +++ b/drivers/net/virtio_net.c @@ -509,19 +509,17 @@ again: return received; } -static unsigned int free_old_xmit_skbs(struct virtnet_info *vi) +static void free_old_xmit_skbs(struct virtnet_info *vi) { struct sk_buff *skb; - unsigned int len, tot_sgs = 0; + unsigned int len; while ((skb = virtqueue_get_buf(vi->svq, &len)) != NULL) { pr_debug("Sent skb %p\n", skb); vi->dev->stats.tx_bytes += skb->len; vi->dev->stats.tx_packets++; - tot_sgs += skb_vnet_hdr(skb)->num_sg; dev_kfree_skb_any(skb); } - return tot_sgs; } static int xmit_skb(struct virtnet_info *vi, struct sk_buff *skb) @@ -611,7 +609,8 @@ static netdev_tx_t start_xmit(struct sk_buff *skb, struct net_device *dev) netif_stop_queue(dev); if (unlikely(!virtqueue_enable_cb_delayed(vi->svq))) { /* More just got used, free them then recheck. */ - capacity += free_old_xmit_skbs(vi); + free_old_xmit_skbs(vi); + capacity = virtqueue_get_capacity(vi->svq); if (capacity >= 2+MAX_SKB_FRAGS) { netif_start_queue(dev); virtqueue_disable_cb(vi->svq); -- 1.7.5.53.gc233e -- To unsubscribe from this list: send the line "unsubscribe linux-s390" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html