netdev - Re: [PATCH] cdc-ether: divorce initialisation with a filter reset and a generic method

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Date:   Thu, 18 May 2017 12:09:11 +0200
From:   Bjørn Mork <bjorn@...k.no>
To:     Oliver Neukum <oneukum@...e.com>
Cc:     davem@...emloft.net, netdev@...r.kernel.org
Subject: Re: [PATCH] cdc-ether: divorce initialisation with a filter reset and a generic method

Oliver Neukum <oneukum@...e.com> writes:

> @@ -417,7 +434,7 @@ int usbnet_cdc_bind(struct usbnet *dev, struct usb_interface *intf)
>  	BUILD_BUG_ON((sizeof(((struct usbnet *)0)->data)
>  			< sizeof(struct cdc_state)));
>  
> -	status = usbnet_generic_cdc_bind(dev, intf);
> +	status = usbnet_ether_cdc_bind(dev, intf);
>  	if (status < 0)
>  		return status;
>  
> @@ -472,7 +489,6 @@ static void usbnet_cdc_zte_status(struct usbnet *dev, struct urb *urb)
>  
>  	if (urb->actual_length < sizeof(*event))
>  		return;
> -
>  	event = urb->transfer_buffer;
>  
>  	if (event->bNotificationType != USB_CDC_NOTIFY_NETWORK_CONNECTION) {
> @@ -493,7 +509,7 @@ static void usbnet_cdc_zte_status(struct usbnet *dev, struct urb *urb)
>  static const struct driver_info	cdc_info = {
>  	.description =	"CDC Ethernet Device",
>  	.flags =	FLAG_ETHER | FLAG_POINTTOPOINT,
> -	.bind =		usbnet_cdc_bind,
> +	.bind =		usbnet_ether_cdc_bind,
>  	.unbind =	usbnet_cdc_unbind,
>  	.status =	usbnet_cdc_status,
>  	.set_rx_mode =	usbnet_cdc_update_filter,


I didn't quite get this.  You change the call in usbnet_cdc_bind() from
usbnet_generic_cdc_bind() to usbnet_ether_cdc_bind(), which I believe is
fine.  But then you update the .bind hook to point to usbnet_ether_cdc_bind.
Why?  The only effect I can see is that usbnet_get_ethernet_addr() is
skipped. That can't be correct?


Bjørn