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From:   David Howells <dhowells@redhat.com>
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References: <20181031104912.s3tqjl3u43ou3kwo@gofer.mess.org> <20181030223249.dhwhxdjipzmjxzsy@gofer.mess.org> <153778383104.14867.1567557014782141706.stgit@warthog.procyon.org.uk> <20181030110319.764f33f0@coco.lan> <8474.1540982182@warthog.procyon.org.uk>
To:     Sean Young <sean@mess.org>
Cc:     dhowells@redhat.com,
        Mauro Carvalho Chehab <mchehab+samsung@kernel.org>,
        Michael Krufky <mkrufky@linuxtv.org>,
        Brad Love <brad@nextdimension.cc>, mchehab@kernel.org,
        linux-media@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] dvb: Allow MAC addresses to be mapped to stable device names with udev
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Sean Young <sean@mess.org> wrote:

> > How do I tell?  If it's all zeros it's not there?
> 
> The mac gets populated through read_mac_address member of
> dvb_usb_device_properties.

That doesn't seem to be true for all drivers. The cx23885 driver does things
differently, for instance.

David