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

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Message-ID: <CACRpkdbLKWDGvhqtwoogNNgQjG86g9HmpceLLVwKW+94dJk63A@mail.gmail.com>
Date:	Wed, 13 Apr 2016 14:43:08 +0200
From:	Linus Walleij <linus.walleij@...aro.org>
To:	Laxman Dewangan <ldewangan@...dia.com>
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 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>

Rebased and applied this patch FWIW.
This is a fair and square bug fix so need to go in
no matter what happens with the hog patches.

Yours,
Linus Walleij