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Commit 2c9a266a authored by Manish Chopra's avatar Manish Chopra Committed by David S. Miller
Browse files

qlge: Fix receive packets drop. 



When running small packets [length < 256 bytes] traffic, packets were
being dropped due to invalid data in those packets which were
delivered by the driver upto the stack. Using pci_dma_sync_single_for_cpu
ensures copying latest and updated data into skb from the receive buffer.

Signed-off-by: default avatarSony Chacko <sony.chacko@qlogic.com>
Signed-off-by: default avatarManish Chopra <manish.chopra@qlogic.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent cc2fa619

drivers/net/ethernet/qlogic/qlge/qlge_main.c

+11 −0
Original line number Diff line number Diff line
@@ -1648,7 +1648,18 @@ static void ql_process_mac_rx_skb(struct ql_adapter *qdev, 
		return;

	}

	skb_reserve(new_skb, NET_IP_ALIGN);



	pci_dma_sync_single_for_cpu(qdev->pdev,

				    dma_unmap_addr(sbq_desc, mapaddr),

				    dma_unmap_len(sbq_desc, maplen),

				    PCI_DMA_FROMDEVICE);



	memcpy(skb_put(new_skb, length), skb->data, length);



	pci_dma_sync_single_for_device(qdev->pdev,

				       dma_unmap_addr(sbq_desc, mapaddr),

				       dma_unmap_len(sbq_desc, maplen),

				       PCI_DMA_FROMDEVICE);

	skb = new_skb;



	/* Frame error, so drop the packet. */