netdev - Re: [PATCH 1/2] r8152: Pass driver_info to REALTEK_USB

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Message-Id: <C307CD73-9CDE-4B70-9928-E8B0303CCDB5@canonical.com>
Date:   Mon, 28 Oct 2019 17:52:16 +0800
From:   Kai-Heng Feng <kai.heng.feng@...onical.com>
To:     Hayes Wang <hayeswang@...ltek.com>
Cc:     "davem@...emloft.net" <davem@...emloft.net>,
        "oliver@...kum.org" <oliver@...kum.org>,
        "linux-usb@...r.kernel.org" <linux-usb@...r.kernel.org>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 1/2] r8152: Pass driver_info to REALTEK_USB_DEVICE() macro



> On Oct 28, 2019, at 17:41, Hayes Wang <hayeswang@...ltek.com> wrote:
> 
> Kai-Heng Feng [mailto:kai.heng.feng@...onical.com]
>> Sent: Friday, October 25, 2019 6:59 PM
> [...]
>> -#define REALTEK_USB_DEVICE(vend, prod)	\
>> +#define REALTEK_USB_DEVICE(vend, prod, info)	\
>> 	.match_flags = USB_DEVICE_ID_MATCH_DEVICE | \
>> 		       USB_DEVICE_ID_MATCH_INT_CLASS, \
>> 	.idVendor = (vend), \
>> 	.idProduct = (prod), \
>> -	.bInterfaceClass = USB_CLASS_VENDOR_SPEC \
>> +	.bInterfaceClass = USB_CLASS_VENDOR_SPEC, \
>> +	.driver_info = (info) \
>> }, \
>> { \
>> 	.match_flags = USB_DEVICE_ID_MATCH_INT_INFO | \
>> @@ -6739,25 +6740,26 @@ static void rtl8152_disconnect(struct
>> usb_interface *intf)
>> 	.idProduct = (prod), \
>> 	.bInterfaceClass = USB_CLASS_COMM, \
>> 	.bInterfaceSubClass = USB_CDC_SUBCLASS_ETHERNET, \
>> -	.bInterfaceProtocol = USB_CDC_PROTO_NONE
>> +	.bInterfaceProtocol = USB_CDC_PROTO_NONE, \
>> +	.driver_info = (info) \
> 
> This part is for ECM mode. Add driver_info here is useless,
> because it is never be used. The driver always changes
> the ECM mode to vendor mode.

Thanks for the explanation.
Since we are going to compare IDs directly in probe(), I'll just drop this patch.

Kai-Heng

> 
> Best Regards,
> Hayes
> 
>