Commit bfe9b9d2df66 ("cdc_ether: Improve ZTE MF823/831/910 handling")
introduces a workaround for certain ZTE modems reporting invalid MAC
addresses over CDC-ECM.
The same issue was present on their RNDIS interface,which was fixed in
commit a5a18bdf7453 ("rndis_host: Set valid random MAC on buggy devices").
However, internal modem of ZTE MF286R router, on its RNDIS interface, also
exhibits a second issue fixed already in CDC-ECM,of the device not respecting
configured random MAC address. In order to share the fixup for this with
rndis_host driver, export the workaround function, which will be re-used in
the following commit in rndis_host.
Cc: Kristian Evensen <kristian.evensen@xxxxxxxxx>
Cc: Bjørn Mork <bjorn@xxxxxxx>
Cc: Oliver Neukum <oliver@xxxxxxxxxx>
Signed-off-by: Lech Perczak <lech.perczak@xxxxxxxxx>
---
drivers/net/usb/cdc_ether.c | 3 ++-
include/linux/usb/usbnet.h | 1 +
2 files changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/net/usb/cdc_ether.c b/drivers/net/usb/cdc_ether.c
index 9b4dfa3001d6..2de09ad5bac0 100644
--- a/drivers/net/usb/cdc_ether.c
+++ b/drivers/net/usb/cdc_ether.c
@@ -479,7 +479,7 @@ static int usbnet_cdc_zte_bind(struct usbnet *dev, struct usb_interface *intf)
* device MAC address has been updated). Always set MAC address to that of the
* device.
*/
-static int usbnet_cdc_zte_rx_fixup(struct usbnet *dev, struct sk_buff *skb)
+int usbnet_cdc_zte_rx_fixup(struct usbnet *dev, struct sk_buff *skb)
{
if (skb->len < ETH_HLEN || !(skb->data[0] & 0x02))
return 1;
@@ -489,6 +489,7 @@ static int usbnet_cdc_zte_rx_fixup(struct usbnet *dev, struct sk_buff *skb)
return 1;
}
+EXPORT_SYMBOL_GPL(usbnet_cdc_zte_rx_fixup);
/* Ensure correct link state
*
diff --git a/include/linux/usb/usbnet.h b/include/linux/usb/usbnet.h
index 8336e86ce606..1b4d72d5e891 100644
--- a/include/linux/usb/usbnet.h
+++ b/include/linux/usb/usbnet.h
@@ -214,6 +214,7 @@ extern int usbnet_ether_cdc_bind(struct usbnet *dev, struct usb_interface *intf)
extern int usbnet_cdc_bind(struct usbnet *, struct usb_interface *);
extern void usbnet_cdc_unbind(struct usbnet *, struct usb_interface *);
extern void usbnet_cdc_status(struct usbnet *, struct urb *);
+extern int usbnet_cdc_zte_rx_fixup(struct usbnet *dev, struct sk_buff *skb);
/* CDC and RNDIS support the same host-chosen packet filters for IN transfers */
#define DEFAULT_FILTER (USB_CDC_PACKET_TYPE_BROADCAST \
--
2.30.2
