linux-kernel - Re: [PATCH net-next v3 06/10] net: dsa: Migrate to device_find

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Date:   Wed, 25 Jan 2017 22:25:00 +0100
From:   Greg KH <gregkh@...uxfoundation.org>
To:     Florian Fainelli <f.fainelli@...il.com>
Cc:     Russell King - ARM Linux <linux@...linux.org.uk>,
        Andrew Lunn <andrew@...n.ch>, netdev@...r.kernel.org,
        Jason Cooper <jason@...edaemon.net>,
        Sebastian Hesselbarth <sebastian.hesselbarth@...il.com>,
        Gregory Clement <gregory.clement@...e-electrons.com>,
        Vivien Didelot <vivien.didelot@...oirfairelinux.com>,
        "David S. Miller" <davem@...emloft.net>,
        "moderated list:ARM SUB-ARCHITECTURES" 
        <linux-arm-kernel@...ts.infradead.org>,
        open list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH net-next v3 06/10] net: dsa: Migrate to
 device_find_class()

On Tue, Jan 24, 2017 at 10:59:15AM -0800, Florian Fainelli wrote:
> On 01/19/2017 10:12 AM, Florian Fainelli wrote:
> > 
> > Back to the actual code that triggered this discussion, the whole
> > purpose is just a safeguard. Given a device reference, we can assume
> > that it is indeed the backing device for a net_device, and we could do a
> > to_net_device() right away (and crash if someone did not write correct
> > platform_data structures), or, by walking the device tree (the device
> > driver model one) we can make sure it does belong in the proper class
> > and this is indeed what we think it is.
> 
> Greg, did Russell's explanation clarify things, or do you still think
> this is completely bogus and we need to re design the whole thing?
> 
> Just asking so I can try to resubmit just the preparatory parts or just
> the whole thing.

Sorry, I haven't gotten back to this, it's lower on my list.  Should try
to get to it tomorrow...