[PATCH v2] virtio_net: simplify tx queue wake condition check

[liming . wu]

From: Liming Wu <liming...@jaguarmicro.com>

Consolidate the two nested if conditions for checking tx queue wake
conditions into a single combined condition. This improves code
readability without changing functionality. And move netif_tx_wake_queue
into if condition to reduce unnecessary checks for queue stops.

Signed-off-by: Liming Wu <liming...@jaguarmicro.com>
Tested-by: Lei Yang <leiy...@redhat.com>
Acked-by: Jason Wang <jasow...@redhat.com>
---
 drivers/net/virtio_net.c | 22 ++++++++++------------
 1 file changed, 10 insertions(+), 12 deletions(-)

diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c
index 5d674eb9a0f2..07a378220643 100644
--- a/drivers/net/virtio_net.c
+++ b/drivers/net/virtio_net.c
@@ -3021,12 +3021,11 @@ static void virtnet_poll_cleantx(struct receive_queue 
*rq, int budget)
                        free_old_xmit(sq, txq, !!budget);
                } while (unlikely(!virtqueue_enable_cb_delayed(sq->vq)));
 
-               if (sq->vq->num_free >= MAX_SKB_FRAGS + 2) {
-                       if (netif_tx_queue_stopped(txq)) {
-                               u64_stats_update_begin(&sq->stats.syncp);
-                               u64_stats_inc(&sq->stats.wake);
-                               u64_stats_update_end(&sq->stats.syncp);
-                       }
+               if (sq->vq->num_free >= MAX_SKB_FRAGS + 2 &&
+                   netif_tx_queue_stopped(txq)) {
+                       u64_stats_update_begin(&sq->stats.syncp);
+                       u64_stats_inc(&sq->stats.wake);
+                       u64_stats_update_end(&sq->stats.syncp);
                        netif_tx_wake_queue(txq);
                }
 
@@ -3218,12 +3217,11 @@ static int virtnet_poll_tx(struct napi_struct *napi, 
int budget)
        else
                free_old_xmit(sq, txq, !!budget);
 
-       if (sq->vq->num_free >= MAX_SKB_FRAGS + 2) {
-               if (netif_tx_queue_stopped(txq)) {
-                       u64_stats_update_begin(&sq->stats.syncp);
-                       u64_stats_inc(&sq->stats.wake);
-                       u64_stats_update_end(&sq->stats.syncp);
-               }
+       if (sq->vq->num_free >= MAX_SKB_FRAGS + 2 &&
+           netif_tx_queue_stopped(txq)) {
+               u64_stats_update_begin(&sq->stats.syncp);
+               u64_stats_inc(&sq->stats.wake);
+               u64_stats_update_end(&sq->stats.syncp);
                netif_tx_wake_queue(txq);
        }
 
-- 
2.34.1