From d4ed7463d02aef4b2270ec2a680813cd8b17def7 Mon Sep 17 00:00:00 2001
From: Heiner Kallweit <hkallweit1@gmail.com>
Date: Fri, 23 Aug 2019 20:07:26 +0200
Subject: [PATCH] r8169: fix DMA issue on MIPS platform
Git-commit: d4ed7463d02aef4b2270ec2a680813cd8b17def7
Patch-mainline: v5.4-rc1
References: git-fixes
As reported by Aaro this patch causes network problems on
MIPS Loongson platform. Therefore revert it.
Fixes: f072218cca5b ("r8169: remove not needed call to dma_sync_single_for_device")
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Reported-by: Aaro Koskinen <aaro.koskinen@iki.fi>
Signed-off-by: David S. Miller <davem@davemloft.net>
Acked-by: Takashi Iwai <tiwai@suse.de>
---
drivers/net/ethernet/realtek/r8169_main.c | 4 ++++
1 file changed, 4 insertions(+)
--- a/drivers/net/ethernet/realtek/r8169_main.c
+++ b/drivers/net/ethernet/realtek/r8169_main.c
@@ -5990,6 +5990,10 @@ process_pkt:
goto release_descriptor;
}
+ dma_sync_single_for_device(tp_to_dev(tp),
+ le64_to_cpu(desc->addr),
+ pkt_size, DMA_FROM_DEVICE);
+
rtl8169_rx_csum(skb, status);
skb_put(skb, pkt_size);
skb->protocol = eth_type_trans(skb, dev);