linux-kernel - Re: [PATCH v5 1/6] drivers: phy: add generic PHY framework

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Date:	Wed, 3 Apr 2013 18:47:04 +0300
From:	Felipe Balbi <balbi@...com>
To:	Kishon Vijay Abraham I <kishon@...com>
CC:	<balbi@...com>, <gregkh@...uxfoundation.org>, <arnd@...db.de>,
	<akpm@...ux-foundation.org>, <swarren@...dotorg.org>,
	<sylvester.nawrocki@...il.com>, <rob@...dley.net>,
	<netdev@...r.kernel.org>, <davem@...emloft.net>,
	<cesarb@...arb.net>, <linux-usb@...r.kernel.org>,
	<linux-omap@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
	<tony@...mide.com>, <grant.likely@...retlab.ca>,
	<rob.herring@...xeda.com>, <b-cousson@...com>,
	<linux@....linux.org.uk>, <eballetbo@...il.com>,
	<javier@...hile0.org>, <mchehab@...hat.com>,
	<santosh.shilimkar@...com>, <broonie@...nsource.wolfsonmicro.com>,
	<swarren@...dia.com>, <linux-doc@...r.kernel.org>,
	<devicetree-discuss@...ts.ozlabs.org>,
	<linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH v5 1/6] drivers: phy: add generic PHY framework

Hi,

On Wed, Apr 03, 2013 at 08:02:52PM +0530, Kishon Vijay Abraham I wrote:
> >>>>+		ret = -EINVAL;
> >>>>+		goto err0;
> >>>>+	}
> >>>>+
> >>>>+	if (!phy_class)
> >>>>+		phy_core_init();
> >>>
> >>>why don't you setup the class on module_init ? Then this would be a
> >>>terrible error condition here :-)
> >>
> >>This is for the case where the PHY driver gets loaded before the PHY
> >>framework. I could have returned EPROBE_DEFER here instead I thought
> >>will have it this way.
> >
> >looks a bit weird IMO. Is it really possible for PHY to load before ?
> 
> yeah. it actually happened when I tried with beagle and had all the
> modules as built-in. Because twl4030 has subsys_initcall(), it loads
> before PHY framework.

that's a bug in twl4030.

-- 
balbi

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