linux-kernel - Re: [PATCH net-next] cdc_ether: Improve ZTE MF823/831/910 handling

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Message-ID: <CAKfDRXiK82ULw7RnRGdFwzad8NOfnwZN0vqv=08Tf+cNSdyd2g@mail.gmail.com>
Date:	Mon, 18 Jul 2016 17:04:14 +0200
From:	Kristian Evensen <kristian.evensen@...il.com>
To:	Oliver Neukum <oneukum@...e.com>
Cc:	linux-kernel@...r.kernel.org, linux-usb@...r.kernel.org,
	Network Development <netdev@...r.kernel.org>
Subject: Re: [PATCH net-next] cdc_ether: Improve ZTE MF823/831/910 handling

On Mon, Jul 18, 2016 at 4:14 PM, Oliver Neukum <oneukum@...e.com> wrote:
>> Ok, sounds good. So far, I have only seen the random MAC issue with
>> the three previously mentioned devices, but who knows how many else is
>> out there with the same error ... I don't think it should be in the
>> core ethernet code, at least not yet, but I agree it would make sense
>> to move it to for example usbnet_core(). If you agree, I can prepare a
>> patch for it.
>
> I don't see how it would be specific for a subsystem. If the patch
> is correct, it belongs into the networking core.

I had a look at some other drivers, and I think we need to be very
careful about making setting a random MAC too generic. For example, we
might be unlucky and break the possibly_iphdr()-code/assumption in
qmi_wwan.c. And there is probably more code/assumptions like that in
the network stack.

-Kristian