On Thursday 10 January 2013 21:59:28 Wei Shuai wrote:
Hi,
I am afraid this is done in an unclean manner.
> diff --git a/drivers/net/usb/cdc_ncm.c b/drivers/net/usb/cdc_ncm.c
> index 71b6e92..9903f79 100644
> --- a/drivers/net/usb/cdc_ncm.c
> +++ b/drivers/net/usb/cdc_ncm.c
> @@ -545,6 +545,7 @@ EXPORT_SYMBOL_GPL(cdc_ncm_unbind);
> static int cdc_ncm_bind(struct usbnet *dev, struct usb_interface *intf)
> {
> int ret;
> + struct usb_device *udev = interface_to_usbdev(intf);
>
> /* The MBIM spec defines a NCM compatible default altsetting,
> * which we may have matched:
> @@ -572,6 +573,10 @@ static int cdc_ncm_bind(struct usbnet *dev, struct
> usb_interface *intf)
> cdc_ncm_comm_intf_is_mbim(intf->cur_altsetting))
> return -ENODEV;
> #endif
> + /* this buggy device cannot do ARP */
> + if( (le16_to_cpu(udev->descriptor.idVendor) == 0xAAAA) ) {
> + dev->net->flags |= IFF_NOARP;
So either you do a check here ...
> + }
>
> /* NCM data altsetting is always 1 */
> ret = cdc_ncm_bind_common(dev, intf, 1);
> @@ -1186,6 +1191,16 @@ static const struct usb_device_id cdc_devs[] = {
> .driver_info = (unsigned long) &wwan_info,
> },
>
> + /* buggy device cannot send ARP */
> + { .match_flags = USB_DEVICE_ID_MATCH_INT_INFO
> + | USB_DEVICE_ID_MATCH_VENDOR,
> + .idVendor = 0xAAAA,
> + .bInterfaceClass = USB_CLASS_COMM,
> + .bInterfaceSubClass = USB_CDC_SUBCLASS_NCM,
> + .bInterfaceProtocol = USB_CDC_PROTO_NONE,
> + .driver_info = (unsigned long) &wwan_info,
... or you define a matching id here and give it a flag in driver_info
But not both.
Regards
Oliver
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