virtio-net: returns whether napi is complete

rx netdim needs to count the traffic during a complete napi process,
and start updating and comparing samples to make decisions after
the napi ends. Let virtqueue_napi_complete() return true if napi is done,
otherwise vice versa.

Signed-off-by: Heng Qi <hengqi@linux.alibaba.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c
index d16f592c2061fad0414ed893672f91b7813c6423..0ad2894e6a5e6ba83f3aa705d4f32e4480fe8cc3 100644 (file)
--- a/drivers/net/virtio_net.c
+++ b/drivers/net/virtio_net.c
@@ -431,7 +431,7 @@ static void virtqueue_napi_schedule(struct napi_struct *napi,
        }
 }
 
-static void virtqueue_napi_complete(struct napi_struct *napi,
+static bool virtqueue_napi_complete(struct napi_struct *napi,
                                    struct virtqueue *vq, int processed)
 {
        int opaque;
@@ -440,9 +440,13 @@ static void virtqueue_napi_complete(struct napi_struct *napi,
        if (napi_complete_done(napi, processed)) {
                if (unlikely(virtqueue_poll(vq, opaque)))
                        virtqueue_napi_schedule(napi, vq);
+               else
+                       return true;
        } else {
                virtqueue_disable_cb(vq);
        }
+
+       return false;
 }
 
 static void skb_xmit_done(struct virtqueue *vq)