asix: Fix small memory leak in ax88772_unbind()
When Ethernet frames span mulitple URBs, the netdev buffer memory
pointed to by the asix_rx_fixup_info structure remains allocated
during the time gap between the 2 executions of asix_rx_fixup_internal().
This means that if ax88772_unbind() is called within this time
gap to free the memory of the parent private data structure then
a memory leak of the part filled netdev buffer memory will occur.
Therefore, create a new function asix_rx_fixup_common_free() to
free the memory of the netdev buffer and add a call to
asix_rx_fixup_common_free() from inside ax88772_unbind().
Consequently when an unbind occurs part way through receiving
an Ethernet frame, the netdev buffer memory that is holding part
of the received Ethernet frame will now be freed.
Signed-off-by: Dean Jenkins <Dean_Jenkins@mentor.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/usb/asix_devices.c b/drivers/net/usb/asix_devices.c
index a3aa0a2..b2ff88e 100644
--- a/drivers/net/usb/asix_devices.c
+++ b/drivers/net/usb/asix_devices.c
@@ -764,6 +764,7 @@ static int ax88772_bind(struct usbnet *dev, struct usb_interface *intf)
static void ax88772_unbind(struct usbnet *dev, struct usb_interface *intf)
{
+ asix_rx_fixup_common_free(dev->driver_priv);
kfree(dev->driver_priv);
}