From e9f63f30863fd778a5329e93c7e2208b9bcb5b79 Mon Sep 17 00:00:00 2001 From: Francois Romieu Date: Wed, 28 Feb 2007 23:16:57 +0100 Subject: [PATCH] r8169: align the IP header when there is no DMA constraint Align the IP header when the chipset can DMA at any location (plain 0x8169). Otherwise (0x8136/0x8168) obey the constraint imposed by the hardware. This patch complements the previous alignment rework done for copybreak. Original idea from Philip Craig Signed-off-by: Francois Romieu Cc: Philip Craig Cc: Mike Isely Cc: Edward Hsu --- drivers/net/r8169.c | 9 ++++++--- 1 file changed, 6 insertions(+), 3 deletions(-) diff --git a/drivers/net/r8169.c b/drivers/net/r8169.c index d8862cd84f3d..1942bf7843aa 100644 --- a/drivers/net/r8169.c +++ b/drivers/net/r8169.c @@ -1415,7 +1415,7 @@ static const struct rtl_cfg_info { [RTL_CFG_0] = { .hw_start = rtl_hw_start_8169, .region = 1, - .align = 2, + .align = 0, .intr_event = SYSErr | LinkChg | RxOverflow | RxFIFOOver | TxErr | TxOK | RxOK | RxErr, .napi_event = RxFIFOOver | TxErr | TxOK | RxOK | RxOverflow @@ -2076,12 +2076,15 @@ static struct sk_buff *rtl8169_alloc_rx_skb(struct pci_dev *pdev, { struct sk_buff *skb; dma_addr_t mapping; + unsigned int pad; - skb = netdev_alloc_skb(dev, rx_buf_sz + align); + pad = align ? align : NET_IP_ALIGN; + + skb = netdev_alloc_skb(dev, rx_buf_sz + pad); if (!skb) goto err_out; - skb_reserve(skb, (align - 1) & (unsigned long)skb->data); + skb_reserve(skb, align ? ((pad - 1) & (unsigned long)skb->data) : pad); mapping = pci_map_single(pdev, skb->data, rx_buf_sz, PCI_DMA_FROMDEVICE); -- 2.20.1