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solve usb buffer align problem to support usb tether(rndis)

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This commit is contained in:
hwg
2013-06-18 20:09:52 +08:00
parent 323295064c
commit 5263c43067
1 changed files with 19 additions and 1 deletions
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20
drivers/usb/gadget/u_ether.c
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@@ -31,6 +31,7 @@
#include "u_ether.h"
static gfp_t g_gfp_flags;
/*
* This component encapsulates the Ethernet link glue needed to provide
@@ -253,7 +254,7 @@ rx_submit(struct eth_dev *dev, struct usb_request *req, gfp_t gfp_flags)
* but on at least one, checksumming fails otherwise. Note:
* RNDIS headers involve variable numbers of LE32 values.
*/
skb_reserve(skb, NET_IP_ALIGN);
//skb_reserve(skb, NET_IP_ALIGN);
req->buf = skb->data;
req->length = size;
@@ -577,6 +578,21 @@ static netdev_tx_t eth_start_xmit(struct sk_buff *skb,
length = skb->len;
}
// for tx fixup
{
struct sk_buff *tx_skb;
if ((unsigned long)skb->data % 4) {
tx_skb = alloc_skb(skb->len + NET_IP_ALIGN, g_gfp_flags);
if (tx_skb)
memcpy(skb_put(tx_skb, skb->len), skb->data, skb->len);
dev_kfree_skb_any(skb);
skb = tx_skb;
}
length = skb->len;
}
// for tx fixup
req->buf = skb->data;
req->context = skb;
req->complete = tx_complete;
@@ -632,6 +648,8 @@ drop:
static void eth_start(struct eth_dev *dev, gfp_t gfp_flags)
{
DBG(dev, "%s\n", __func__);
g_gfp_flags = gfp_flags;
/* fill the rx queue */
rx_fill(dev, gfp_flags);