cx82310_eth: allow empty URBs

Empty received URBs are currently counted as errors but the device sends them
sometimes as part of regular traffic - so remove this check.

Signed-off-by: Ondrej Zary <linux@rainbow-software.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 3 insertions, 9 deletions

diff --git a/drivers/net/usb/cx82310_eth.c b/drivers/net/usb/cx82310_eth.c
index 4d451789ea7c..8969f124c18c 100644
--- a/drivers/net/usb/cx82310_eth.c
+++ b/drivers/net/usb/cx82310_eth.c
@@ -150,11 +150,11 @@ static int cx82310_bind(struct usbnet *dev, struct usb_interface *intf)
 
         /*
          * this must not include ethernet header as the device can send partial
-         * packets with no header (URB is at least 2 bytes long, so 2 is OK)
+         * packets with no header (and sometimes even empty URBs)
          */
-        dev->net->hard_header_len = 2;
+        dev->net->hard_header_len = 0;
         /* we can send at most 1514 bytes of data (+ 2-byte header) per URB */
-        dev->hard_mtu = CX82310_MTU + dev->net->hard_header_len;
+        dev->hard_mtu = CX82310_MTU + 2;
         /* we can receive URBs up to 4KB from the device */
         dev->rx_urb_size = 4096;
 
@@ -228,12 +228,6 @@ static int cx82310_rx_fixup(struct usbnet *dev, struct sk_buff *skb)
                         return 1;
         }
 
-        if (skb->len < 2) {
-                dev_err(&dev->udev->dev, "RX frame too short: %d B\n",
-                        skb->len);
-                return 0;
-        }
-
         /* a skb can contain multiple packets */
         while (skb->len > 1) {
                 /* first two bytes are packet length */