net: ethernet: mtk_eth_soc: reduce unnecessary interrupts

Avoid rearming interrupt if napi_complete returns false
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

@@ -1519,7 +1519,7 @@ static int mtk_napi_tx(struct napi_struct *napi, int budget)
 	if (status & MTK_TX_DONE_INT)
 		return budget;
 
-	napi_complete(napi);
+	if (napi_complete(napi))
 		mtk_tx_irq_enable(eth, MTK_TX_DONE_INT);
 
 	return tx_done;
@@ -1553,7 +1553,8 @@ static int mtk_napi_rx(struct napi_struct *napi, int budget)
 		remain_budget -= rx_done;
 		goto poll_again;
 	}
-	napi_complete(napi);
+
+	if (napi_complete(napi))
 		mtk_rx_irq_enable(eth, MTK_RX_DONE_INT);
 
 	return rx_done + budget - remain_budget;