linux-kernel - Re: [patch 1/5] pinctrl: samsung: Remove bogus irq

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Message-ID: <CACRpkdazKNDdcoJxvJ9injibZmOTsdmN-Y0sTS5eyanwz=iFEA@mail.gmail.com>
Date:   Fri, 30 Jun 2017 15:53:18 +0200
From:   Linus Walleij <linus.walleij@...aro.org>
To:     Thomas Gleixner <tglx@...utronix.de>
Cc:     LKML <linux-kernel@...r.kernel.org>,
        Marc Zyngier <marc.zyngier@....com>,
        Brian Norris <briannorris@...omium.org>,
        Heiko Stuebner <heiko@...ech.de>,
        "open list:ARM/Rockchip SoC..." <linux-rockchip@...ts.infradead.org>,
        Julia Cartwright <julia@...com>,
        "linux-gpio@...r.kernel.org" <linux-gpio@...r.kernel.org>,
        John Keeping <john@...anate.com>,
        Doug Anderson <dianders@...omium.org>,
        Tomasz Figa <tomasz.figa@...il.com>,
        Krzysztof Kozlowski <krzk@...nel.org>,
        Sylwester Nawrocki <s.nawrocki@...sung.com>,
        Kukjin Kim <kgene@...nel.org>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        linux-samsung-soc <linux-samsung-soc@...r.kernel.org>
Subject: Re: [patch 1/5] pinctrl: samsung: Remove bogus irq_[un]mask from
 resource management

On Thu, Jun 29, 2017 at 11:33 PM, Thomas Gleixner <tglx@...utronix.de> wrote:

> The irq chip callbacks irq_request/release_resources() have absolutely no
> business with masking and unmasking the irq.
>
> The core code unmasks the interrupt after complete setup and masks it
> before invoking irq_release_resources().
>
> The unmask is actually harmful as it happens before the interrupt is
> completely initialized in __setup_irq().
>
> Remove it.
>
> Fixes: f6a8249f9e55 ("pinctrl: exynos: Lock GPIOs as interrupts when used as EINTs")
> Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
> Cc: Tomasz Figa <tomasz.figa@...il.com>
> Cc: Krzysztof Kozlowski <krzk@...nel.org>
> Cc: Sylwester Nawrocki <s.nawrocki@...sung.com>
> Cc: Linus Walleij <linus.walleij@...aro.org>
> Cc: Kukjin Kim <kgene@...nel.org>
> Cc: linux-arm-kernel@...ts.infradead.org
> Cc: linux-samsung-soc@...r.kernel.org
> Cc: linux-gpio@...r.kernel.org

Patch applied directly since it has no deps and fixes queued stuff for v4.13.
I guess Krysztof will make sure it doesn't break anything.

Yours,
Linus Walleij