netdev - Re: [PATCH for v3.15] net: mvmdio: Check for a valid interrupt instead of an error

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Date:	Wed, 30 Apr 2014 13:21:01 -0300
From:	Ezequiel Garcia <ezequiel.garcia@...e-electrons.com>
To:	Sebastian Hesselbarth <sebastian.hesselbarth@...il.com>
Cc:	netdev@...r.kernel.org,
	Thomas Petazzoni <thomas.petazzoni@...e-electrons.com>,
	Lior Amsalem <alior@...vell.com>,
	Tawfik Bayouk <tawfik@...vell.com>,
	Gregory Clement <gregory.clement@...e-electrons.com>,
	"David S. Miller" <davem@...emloft.net>,
	linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH for v3.15] net: mvmdio: Check for a valid interrupt
 instead of an error

On Apr 30, Sebastian Hesselbarth wrote:
> >
> >Yes, I agree. Did another patch for that, but haven't send it yet.
> >AFAICS, mvebu platforms will never hit the deferred case as the irqchip
> >is the first driver registered (as per drivers/Makefile).
> >
> >Not that we should count on that :)
> 
> It doesn't hit it _now_ because of the above. I read about proper
> platform_device for early devices here and there over and over
> again, so I guess some day it may become an issue.
> 
> As we know about the potential -EPROBE_DEFER now, I suggest to
> deal with it now, too.
> 
> Can you resend this as v2 with the other patch you mentioned
> squashed in?
> 

Oh! I've just remembered why I didn't send the EPROBE_DEFER patch in the first
place. The mvneta driver connects to the phy at open()-time, in a function
called "mvneta_mdio_probe()". This name confused me to think the mdio was
really probed at open()-time.

I guess it was very late at night when I came to such conclusion :)
-- 
Ezequiel García, Free Electrons
Embedded Linux, Kernel and Android Engineering
http://free-electrons.com
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