ASIX: Use only 11 bits of header for data size

The AX88772B uses only 11 bits of the header for the actual size. The other bits are used for something else. This causes dmesg full of messages: asix_rx_fixup() Bad Header Length This patch trims the check to only 11 bits. I believe on older chips, the remaining 5 top bits are unused. Signed-off-by: Marek Vasut <[email protected]> Signed-off-by: David S. Miller <[email protected]>
mna · Jul 28, 2011 · bca0beb · bca0beb
1 parent bc466e6
commit bca0beb
Showing 1 changed file with 2 additions and 2 deletions.
diff --git a/drivers/net/usb/asix.c b/drivers/net/usb/asix.c
@@ -314,11 +314,11 @@ static int asix_rx_fixup(struct usbnet *dev, struct sk_buff *skb)
 	skb_pull(skb, 4);
 
 	while (skb->len > 0) {
-		if ((header & 0xffff) != ((~header >> 16) & 0xffff))
+		if ((header & 0x07ff) != ((~header >> 16) & 0x07ff))
 			netdev_err(dev->net, "asix_rx_fixup() Bad Header Length\n");
 
 		/* get the packet length */
-		size = (u16) (header & 0x0000ffff);
+		size = (u16) (header & 0x000007ff);
 
 		if ((skb->len) - ((size + 1) & 0xfffe) == 0) {
 			u8 alignment = (unsigned long)skb->data & 0x3;