linux-kernel - Re: [PATCH V2 3/5] gpio: of: Return error if gpio hog configuration failed

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Message-ID: <56E93F2A.60303@nvidia.com>
Date:	Wed, 16 Mar 2016 16:40:34 +0530
From:	Laxman Dewangan <ldewangan@...dia.com>
To:	Linus Walleij <linus.walleij@...aro.org>
CC:	Rob Herring <robh+dt@...nel.org>,
	Paweł Moll <pawel.moll@....com>,
	Mark Rutland <mark.rutland@....com>,
	Markus Pargmann <mpa@...gutronix.de>,
	Stephen Warren <swarren@...dotorg.org>,
	Thierry Reding <treding@...dia.com>,
	Benoit Parrot <bparrot@...com>,
	Alexandre Courbot <acourbot@...dia.com>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH V2 3/5] gpio: of: Return error if gpio hog configuration
 failed


On Tuesday 15 March 2016 07:42 PM, Linus Walleij wrote:
> On Fri, Mar 11, 2016 at 2:43 PM, Laxman Dewangan <ldewangan@...dia.com> wrote:
>
>> If GPIO hog configuration failed while adding OF based
>> gpiochip() then return the error instead of ignoring it.
>>
>> This helps of properly handling the gpio driver dependency.
>>
>> When adding the gpio hog nodes for NVIDIA's Tegra210 platforms,
>> the gpio_hogd() fails with EPROBE_DEFER because pinctrl is not
>> ready at this time and gpio_request() for Tegra GPIO driver
>> returns error. The error was not causing the Tegra GPIO driver
>> to fail as the error was getting ignored.
>>
>> Signed-off-by: Laxman Dewangan <ldewangan@...dia.com>
>> Cc: Benoit Parrot <bparrot@...com>
>> Cc: Alexandre Courbot <acourbot@...dia.com>
>> Reviewed-by: Thierry Reding <treding@...dia.com>
> Oops is this something I should apply for fixes and tag
> for stable?
>

I dont think that it is needed for stable as this is newly added feature.