linux-kernel - RE: [PATCH] r8152: Add MAC passthrough support to new device

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Date:   Tue, 14 Jan 2020 20:33:19 +0000
From:   <Mario.Limonciello@...l.com>
To:     <kai.heng.feng@...onical.com>, <davem@...emloft.net>,
        <hayeswang@...ltek.com>
CC:     <jakub.kicinski@...ronome.com>, <pmalani@...omium.org>,
        <grundler@...omium.org>, <David.Chen7@...l.com>,
        <linux-usb@...r.kernel.org>, <netdev@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>
Subject: RE: [PATCH] r8152: Add MAC passthrough support to new device



> -----Original Message-----
> From: Kai-Heng Feng <kai.heng.feng@...onical.com>
> Sent: Monday, January 13, 2020 10:41 PM
> To: davem@...emloft.net; hayeswang@...ltek.com
> Cc: Kai-Heng Feng; Jakub Kicinski; Prashant Malani; Grant Grundler; Limonciello,
> Mario; Chen7, David; open list:USB NETWORKING DRIVERS; open list:NETWORKING
> DRIVERS; open list
> Subject: [PATCH] r8152: Add MAC passthrough support to new device
> 
> 
> [EXTERNAL EMAIL]
> 
> Device 0xa387 also supports MAC passthrough, therefore add it to the
> whitelst.

Have you confirmed whether this product ID is unique to the products that
support this feature or if it's also re-used in other products?

For Dell's devices there are very specific tests that make sure that this
feature only applies on the products it is supposed to and nothing else
(For example RTL8153-AD checks variant as well as effuse value)
(Example two: RTL8153-BND is a Dell only part).

> 
> BugLink: https://bugs.launchpad.net/bugs/1827961/comments/30
> Signed-off-by: Kai-Heng Feng <kai.heng.feng@...onical.com>
> ---
>  drivers/net/usb/r8152.c | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/net/usb/r8152.c b/drivers/net/usb/r8152.c
> index c5ebf35d2488..42dcf1442cc0 100644
> --- a/drivers/net/usb/r8152.c
> +++ b/drivers/net/usb/r8152.c
> @@ -6657,7 +6657,8 @@ static int rtl8152_probe(struct usb_interface *intf,
>  	}
> 
>  	if (le16_to_cpu(udev->descriptor.idVendor) == VENDOR_ID_LENOVO &&
> -	    le16_to_cpu(udev->descriptor.idProduct) == 0x3082)
> +	    (le16_to_cpu(udev->descriptor.idProduct) == 0x3082 ||
> +	     le16_to_cpu(udev->descriptor.idProduct) == 0xa387))
>  		set_bit(LENOVO_MACPASSTHRU, &tp->flags);
> 
>  	if (le16_to_cpu(udev->descriptor.bcdDevice) == 0x3011 && udev->serial
> &&
> --
> 2.17.1