target/linux/generic/pending-5.15/702-net-ethernet-mtk_eth_soc-enable-threaded-NAPI.patch


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From: Felix Fietkau <nbd@nbd.name>
Date: Mon, 21 Mar 2022 20:39:59 +0100
Subject: [PATCH] net: ethernet: mtk_eth_soc: enable threaded NAPI

This can improve performance under load by ensuring that NAPI processing is
not pinned on CPU 0.

Signed-off-by: Felix Fietkau <nbd@nbd.name>
---

--- a/drivers/net/ethernet/mediatek/mtk_eth_soc.c
+++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.c
@@ -2823,8 +2823,8 @@ static irqreturn_t mtk_handle_irq_rx(int
 
 	eth->rx_events++;
 	if (likely(napi_schedule_prep(&eth->rx_napi))) {
-		__napi_schedule(&eth->rx_napi);
 		mtk_rx_irq_disable(eth, eth->soc->txrx.rx_irq_done_mask);
+		__napi_schedule(&eth->rx_napi);
 	}
 
 	return IRQ_HANDLED;
@@ -2836,8 +2836,8 @@ static irqreturn_t mtk_handle_irq_tx(int
 
 	eth->tx_events++;
 	if (likely(napi_schedule_prep(&eth->tx_napi))) {
-		__napi_schedule(&eth->tx_napi);
 		mtk_tx_irq_disable(eth, MTK_TX_DONE_INT);
+		__napi_schedule(&eth->tx_napi);
 	}
 
 	return IRQ_HANDLED;
@@ -4350,6 +4350,8 @@ static int mtk_probe(struct platform_dev
 	 * for NAPI to work
 	 */
 	init_dummy_netdev(&eth->dummy_dev);
+	eth->dummy_dev.threaded = 1;
+	strcpy(eth->dummy_dev.name, "mtk_eth");
 	netif_napi_add(&eth->dummy_dev, &eth->tx_napi, mtk_napi_tx,
 		       NAPI_POLL_WEIGHT);
 	netif_napi_add(&eth->dummy_dev, &eth->rx_napi, mtk_napi_rx,