static void do_rx(unsigned long mac_ptr)
{
struct zd_mac *mac = (struct zd_mac *)mac_ptr;
struct sk_buff *skb;
while ((skb = skb_dequeue(&mac->rx_queue)) != NULL)
zd_mac_rx(mac, skb);
}
static void handle_rx_packet(struct zd_usb *usb, const u8 *buffer,
unsigned int length)
{
int i;
const struct rx_length_info *length_info;
if (length < sizeof(struct rx_length_info)) {
/* It's not a complete packet anyhow. */
printk("%s: invalid, small RX packet : %d\n",
__func__, length);
return;
}
length_info = (struct rx_length_info *)
(buffer + length - sizeof(struct rx_length_info));
/* It might be that three frames are merged into a single URB
* transaction. We have to check for the length info tag.
*
* While testing we discovered that length_info might be unaligned,
* because if USB transactions are merged, the last packet will not
* be padded. Unaligned access might also happen if the length_info
* structure is not present.
*/
if (get_unaligned_le16(&length_info->tag) == RX_LENGTH_INFO_TAG)
{
unsigned int l, k, n;
for (i = 0, l = 0;; i++) {
k = get_unaligned_le16(&length_info->length[i]);
if (k == 0)
return;
n = l+k;
if (n > length)
return;
zd_mac_rx(zd_usb_to_hw(usb), buffer+l, k);
if (i >= 2)
return;
l = (n+3) & ~3;
}
} else {
zd_mac_rx(zd_usb_to_hw(usb), buffer, length);
}
}
