From: Manish Chopra Date: Tue, 15 Mar 2016 11:13:45 +0000 (-0400) Subject: qlge: Fix receive packets drop. X-Git-Tag: v3.10.102~75 X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=fb7d23cba8d89ed9f7cb629efab26c08a7384cb0;p=thirdparty%2Fkernel%2Fstable.git qlge: Fix receive packets drop. commit 2c9a266afefe137bff06bbe0fc48b4d3b3cb348c upstream. 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: Sony Chacko Signed-off-by: Manish Chopra Signed-off-by: David S. Miller Signed-off-by: Willy Tarreau --- diff --git a/drivers/net/ethernet/qlogic/qlge/qlge_main.c b/drivers/net/ethernet/qlogic/qlge/qlge_main.c index f87cc216045b5..a978cc2eafe07 100644 --- a/drivers/net/ethernet/qlogic/qlge/qlge_main.c +++ b/drivers/net/ethernet/qlogic/qlge/qlge_main.c @@ -1620,7 +1620,18 @@ 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. */