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r8169: remove not needed call to dma_sync_single_for_device 

DMA_API_HOWTO.txt includes an example explaining when
dma_sync_single_for_device() is not needed, and that example matches
our use case. The buffer isn't changed by the CPU and direction is
DMA_FROM_DEVICE, so we can remove the call to
dma_sync_single_for_device().

Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
alistair/sunxi64-5.4-dsi
Heiner Kallweit 2019-06-27 23:19:09 +02:00 committed by David S. Miller
parent 3c18cbe337
commit f072218cca
1 changed files with 0 additions and 1 deletions
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drivers/net/ethernet/realtek/r8169_main.c
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@ -5785,7 +5785,6 @@ 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;
}