Re: [PATCH 2/2] RTL8153-BD is used in Dell DA300 type-C dongle. It should be added to the whitelist of devices to activate MAC address pass through.

[Oliver Neukum <oneukum@suse.com>]

On Mo, 2019-02-18 at 11:48 +0800, David Chen wrote:
> From: David Chen <david.chen7@dell.com>
> 
> Per confirming with Realtek all devices containing RTL8153-BD should
> activate MAC pass through and there won't use pass through bit on efuse
> like in RTL8153-AD.
> 
> Signed-off-by: David Chen <david.chen7@dell.com>
> ---
>  drivers/net/usb/r8152.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/net/usb/r8152.c b/drivers/net/usb/r8152.c
> index ada6baf8847a..86c8c64fbb0f 100644
> --- a/drivers/net/usb/r8152.c
> +++ b/drivers/net/usb/r8152.c
> @@ -1179,7 +1179,7 @@ static int vendor_mac_passthru_addr_read(struct r8152 *tp, struct sockaddr *sa)
>  	} else {
>  		/* test for RTL8153-BND and RTL8153-BD */
>  		ocp_data = ocp_read_byte(tp, MCU_TYPE_USB, USB_MISC_1);
> -		if ((ocp_data & BND_MASK) == 0 && (ocp_data & BD_MASK)) {
> +		if ((ocp_data & BND_MASK) == 0 && (ocp_data & BD_MASK) == 0) {

You are inverting the second half of the test. How can this possibly be
right? Had you dropped it, I would understand. But this? Are you sure?

	Regards
		Oliver