linux-kernel - Re: [PATCH] pwm-backlight: add regulator and GPIO support

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Message-ID: <20120704202644.GG30009@pengutronix.de>
Date:	Wed, 4 Jul 2012 22:26:44 +0200
From:	Sascha Hauer <s.hauer@...gutronix.de>
To:	Alex Courbot <acourbot@...dia.com>
Cc:	Thierry Reding <thierry.reding@...onic-design.de>,
	"linux-tegra@...r.kernel.org" <linux-tegra@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-fbdev@...r.kernel.org" <linux-fbdev@...r.kernel.org>
Subject: Re: [PATCH] pwm-backlight: add regulator and GPIO support

On Thu, Jul 05, 2012 at 12:14:39AM +0900, Alex Courbot wrote:
> On Wed 04 Jul 2012 10:00:56 PM JST, Sascha Hauer wrote:
> >>That's very bad indeed. I assumed that the kernel would free
> >>devm-allocated resources after probe returned -EPROBE_DEFER,
> >
> >It indeed does free devm allocated resources, but neither the gpio nor
> >the pwm are devm allocated.
> 
> As far as I can tell the gpio is allocated through devm as well:
> 
> > +		ret = devm_gpio_request_one(&pdev->dev, data->enable_gpio,
> > +				GPIOF_OUT_INIT_HIGH, "backlight_enable");

You're right. For the GPIO it's ok the way it is.

Sascha

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