| From foo@baz Sat Apr 16 22:36:37 PDT 2016 |
| From: Manish Chopra <manish.chopra@qlogic.com> |
| Date: Tue, 15 Mar 2016 07:13:45 -0400 |
| Subject: qlge: Fix receive packets drop. |
| Status: RO |
| Content-Length: 1438 |
| Lines: 40 |
| |
| From: Manish Chopra <manish.chopra@qlogic.com> |
| |
| [ Upstream commit 2c9a266afefe137bff06bbe0fc48b4d3b3cb348c ] |
| |
| 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 <sony.chacko@qlogic.com> |
| Signed-off-by: Manish Chopra <manish.chopra@qlogic.com> |
| Signed-off-by: David S. Miller <davem@davemloft.net> |
| Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
| --- |
| drivers/net/ethernet/qlogic/qlge/qlge_main.c | 11 +++++++++++ |
| 1 file changed, 11 insertions(+) |
| |
| --- a/drivers/net/ethernet/qlogic/qlge/qlge_main.c |
| +++ b/drivers/net/ethernet/qlogic/qlge/qlge_main.c |
| @@ -1648,7 +1648,18 @@ static void ql_process_mac_rx_skb(struct |
| 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. */ |
