netdev - [PATCH net] Revert "r8169: remove not needed call to dma_sync_single_for

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Message-ID: <573e5947-3a12-f69d-d1b3-1b0d1c49f367@gmail.com>
Date:   Fri, 23 Aug 2019 19:57:49 +0200
From:   Heiner Kallweit <hkallweit1@...il.com>
To:     Realtek linux nic maintainers <nic_swsd@...ltek.com>,
        David Miller <davem@...emloft.net>
Cc:     "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        Aaro Koskinen <aaro.koskinen@....fi>
Subject: [PATCH net] Revert "r8169: remove not needed call to
 dma_sync_single_for_device"

This reverts commit f072218cca5b076dd99f3dfa3aaafedfd0023a51.

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@...il.com>
Reported-by: Aaro Koskinen <aaro.koskinen@....fi>
---
This fix doesn't apply cleanly on net-next, I'll provide a separate one for net-next.
---
 drivers/net/ethernet/realtek/r8169_main.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/net/ethernet/realtek/r8169_main.c b/drivers/net/ethernet/realtek/r8169_main.c
index e1dd6ea60..bae0074ab 100644
--- a/drivers/net/ethernet/realtek/r8169_main.c
+++ b/drivers/net/ethernet/realtek/r8169_main.c
@@ -5921,6 +5921,7 @@ static struct sk_buff *rtl8169_try_rx_copy(void *data,
 	skb = napi_alloc_skb(&tp->napi, pkt_size);
 	if (skb)
 		skb_copy_to_linear_data(skb, data, pkt_size);
+	dma_sync_single_for_device(d, addr, pkt_size, DMA_FROM_DEVICE);
 
 	return skb;
 }
-- 
2.23.0