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modify cdc_ether for usb dma data align: support rtl8152B usb ethernet

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This commit is contained in:
hwg
2013-06-08 19:32:04 +08:00
parent 4b0a2158ae
commit bbef1aa720
1 changed files with 18 additions and 0 deletions
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18
drivers/net/usb/cdc_ether.c
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@@ -460,6 +460,23 @@ static int cdc_manage_power(struct usbnet *dev, int on)
return 0;
}
static struct sk_buff *android_tx_fixup(struct usbnet *dev,
struct sk_buff *skb,
gfp_t flags)
{
struct sk_buff *tx_skb;
if ((unsigned long)skb->data % 4) {
tx_skb = alloc_skb(skb->len + NET_IP_ALIGN, flags);
if (tx_skb)
memcpy(skb_put(tx_skb, skb->len), skb->data, skb->len);
dev_kfree_skb_any(skb);
} else
tx_skb = skb;
return tx_skb;
}
static const struct driver_info cdc_info = {
.description = "CDC Ethernet Device",
.flags = FLAG_ETHER | FLAG_POINTTOPOINT,
@@ -468,6 +485,7 @@ static const struct driver_info cdc_info = {
.unbind = usbnet_cdc_unbind,
.status = usbnet_cdc_status,
.manage_power = cdc_manage_power,
.tx_fixup = android_tx_fixup,
};
static const struct driver_info wwan_info = {