Commit f072218c authored Jun 27, 2019 by Heiner Kallweit Committed by David S. Miller Jun 29, 2019

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>

parent 3c18cbe3

drivers/net/ethernet/realtek/r8169_main.c

+0 −1

Original line number	Diff line number	Diff line
		@@ -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;
		}

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