openwrt/target/linux/generic/backport-5.10/610-v5.13-42-net-ethernet-mtk_eth_soc-remove-unnecessary-TX-queue.patch

From 16ef670789b252b221700adc413497ed2f941d8a Mon Sep 17 00:00:00 2001
From: Felix Fietkau <nbd@nbd.name>
Date: Thu, 22 Apr 2021 22:20:59 -0700
Subject: [PATCH] net: ethernet: mtk_eth_soc: remove unnecessary TX queue stops

When running short on descriptors, only stop the queue for the netdev that
tx was attempted for. By the time something tries to send on the other
netdev, the ring might have some more room already.

Signed-off-by: Felix Fietkau <nbd@nbd.name>
Signed-off-by: Ilya Lipnitskiy <ilya.lipnitskiy@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 drivers/net/ethernet/mediatek/mtk_eth_soc.c | 15 ++-------------
 1 file changed, 2 insertions(+), 13 deletions(-)

--- a/drivers/net/ethernet/mediatek/mtk_eth_soc.c
+++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.c
@@ -1164,17 +1164,6 @@ static void mtk_wake_queue(struct mtk_et
 	}
 }
 
-static void mtk_stop_queue(struct mtk_eth *eth)
-{
-	int i;
-
-	for (i = 0; i < MTK_MAC_COUNT; i++) {
-		if (!eth->netdev[i])
-			continue;
-		netif_stop_queue(eth->netdev[i]);
-	}
-}
-
 static netdev_tx_t mtk_start_xmit(struct sk_buff *skb, struct net_device *dev)
 {
 	struct mtk_mac *mac = netdev_priv(dev);
@@ -1195,7 +1184,7 @@ static netdev_tx_t mtk_start_xmit(struct
 
 	tx_num = mtk_cal_txd_req(skb);
 	if (unlikely(atomic_read(&ring->free_count) <= tx_num)) {
-		mtk_stop_queue(eth);
+		netif_stop_queue(dev);
 		netif_err(eth, tx_queued, dev,
 			  "Tx Ring full when queue awake!\n");
 		spin_unlock(&eth->page_lock);
@@ -1221,7 +1210,7 @@ static netdev_tx_t mtk_start_xmit(struct
 		goto drop;
 
 	if (unlikely(atomic_read(&ring->free_count) <= ring->thresh))
-		mtk_stop_queue(eth);
+		netif_stop_queue(dev);
 
 	spin_unlock(&eth->page_lock);