[Linux-kernel-mentees] [PATCH v3] net: usb: rtl8150: set random MAC address when set_ethernet_addr() fails

[Joe Perches]

On Sun, 2020-10-04 at 02:49 +0530, Anant Thazhemadam wrote:
> When get_registers() fails, in set_ethernet_addr(),the uninitialized
> value of node_id gets copied as the address. This can be considered as
> set_ethernet_addr() itself failing.
[]
> diff --git a/drivers/net/usb/rtl8150.c b/drivers/net/usb/rtl8150.c
[]
> @@ -909,7 +914,10 @@ static int rtl8150_probe(struct usb_interface *intf,
>  		goto out1;
>  	}
>  	fill_skb_pool(dev);
> -	set_ethernet_addr(dev);
> +	if (!set_ethernet_addr(dev)) {
> +		dev_err(&intf->dev, "assigining a random MAC address\n");
> +		eth_hw_addr_random(dev->netdev);

4 things:

o Typo for assigning
o Reverse the assignment and message to show the new random MAC
o This should use netdev_<level>
o Is this better as error or notification?

	if (!set_ethernet_addr(dev)) {
		eth_hw_addr_random(dev->netdev);
		netdev_notice(dev->netdev, "Assigned a random MAC: %pM\n",
			      dev->netdev->dev_addr);
	}