netdev - RE: [PATCH 2/2] r8152: Add macpassthru support for ThinkPad Thunderbolt 3 Dock Gen 2

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Date:   Mon, 28 Oct 2019 03:58:28 +0000
From:   Hayes Wang <hayeswang@...ltek.com>
To:     Kai-Heng Feng <kai.heng.feng@...onical.com>,
        "davem@...emloft.net" <davem@...emloft.net>,
        "oliver@...kum.org" <oliver@...kum.org>
CC:     "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>,
        nic_swsd <nic_swsd@...ltek.com>
Subject: RE: [PATCH 2/2] r8152: Add macpassthru support for ThinkPad Thunderbolt 3 Dock Gen 2

Kai-Heng Feng [mailto:kai.heng.feng@...onical.com]
> Sent: Friday, October 25, 2019 6:59 PM
[...]
> @@ -6626,6 +6648,9 @@ static int rtl8152_probe(struct usb_interface *intf,
>  		netdev->hw_features &= ~NETIF_F_RXCSUM;
>  	}
> 
> +	if (id->driver_info & R8152_QUIRK_LENOVO_MACPASSTHRU)

Do you really need this?
It seems the information of idVendor and idProduct is enough. 

> +		set_bit(LENOVO_MACPASSTHRU, &tp->flags);
> +
>  	if (le16_to_cpu(udev->descriptor.bcdDevice) == 0x3011 && udev->serial
> &&
>  	    (!strcmp(udev->serial, "000001000000") ||
>  	     !strcmp(udev->serial, "000002000000"))) {
> @@ -6754,6 +6779,8 @@ static const struct usb_device_id rtl8152_table[] = {
>  	{REALTEK_USB_DEVICE(VENDOR_ID_LENOVO,  0x304f, 0)},
>  	{REALTEK_USB_DEVICE(VENDOR_ID_LENOVO,  0x3062, 0)},
>  	{REALTEK_USB_DEVICE(VENDOR_ID_LENOVO,  0x3069, 0)},
> +	{REALTEK_USB_DEVICE(VENDOR_ID_LENOVO,  0x3082,
> +			R8152_QUIRK_LENOVO_MACPASSTHRU)},

This limits the usage of driver_info. For example, I couldn't
use it to store a pointer address anymore.

>  	{REALTEK_USB_DEVICE(VENDOR_ID_LENOVO,  0x7205, 0)},
>  	{REALTEK_USB_DEVICE(VENDOR_ID_LENOVO,  0x720c, 0)},
>  	{REALTEK_USB_DEVICE(VENDOR_ID_LENOVO,  0x7214, 0)},
> --
> 2.17.1