r8169: more alignment for the 0x8168

Two thirds of packets are lost because of misalignment. Users of
Asus laptop did apparently not notice it.

Reported on Gigabyte GA-945GM-S2.

Fix for http://bugzilla.kernel.org/show_bug.cgi?id=7517

Signed-off-by: Francois Romieu <romieu@fr.zoreil.com>

diff --git a/drivers/net/r8169.c b/drivers/net/r8169.c
index 0b57050..2379d83 100644 (file)
--- a/drivers/net/r8169.c
+++ b/drivers/net/r8169.c
@@ -2018,7 +2018,7 @@ static int rtl8169_alloc_rx_skb(struct pci_dev *pdev, struct sk_buff **sk_buff,
        if (!skb)
                goto err_out;
 
-       skb_reserve(skb, align);
+       skb_reserve(skb, (align - 1) & (u32)skb->data);
        *sk_buff = skb;
 
        mapping = pci_map_single(pdev, skb->data, rx_buf_sz,
@@ -2486,7 +2486,7 @@ static inline int rtl8169_try_rx_copy(struct sk_buff **sk_buff, int pkt_size,
 
                skb = dev_alloc_skb(pkt_size + align);
                if (skb) {
-                       skb_reserve(skb, align);
+                       skb_reserve(skb, (align - 1) & (u32)skb->data);
                        eth_copy_and_sum(skb, sk_buff[0]->data, pkt_size, 0);
                        *sk_buff = skb;
                        rtl8169_mark_to_asic(desc, rx_buf_sz);