Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18;
MIME-Version: 1.0
References: <20200907153135.3307-1-a.fatoum@pengutronix.de>
In-Reply-To: <20200907153135.3307-1-a.fatoum@pengutronix.de>
From:   Bartosz Golaszewski <bgolaszewski@baylibre.com>
Date:   Wed, 9 Sep 2020 11:43:24 +0200
Message-ID: <CAMpxmJWJo=wZmBdAxS2JWVMmg+g2dZG9Do7z+ROy0s37rWTw+w@mail.gmail.com>
Subject: Re: [PATCH v2] gpio: siox: explicitly support only threaded irqs
To:     Ahmad Fatoum <a.fatoum@pengutronix.de>
Cc:     Thorsten Scherer <t.scherer@eckelmann.de>,
        =?UTF-8?Q?Uwe_Kleine=2DK=C3=B6nig?= 
        <u.kleine-koenig@pengutronix.de>,
        Pengutronix Kernel Team <kernel@pengutronix.de>,
        Linus Walleij <linus.walleij@linaro.org>,
        Thomas Gleixner <tglx@linutronix.de>,
        linux-gpio <linux-gpio@vger.kernel.org>,
        LKML <linux-kernel@vger.kernel.org>
Content-Type: text/plain; charset="UTF-8"
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

On Mon, Sep 7, 2020 at 5:32 PM Ahmad Fatoum <a.fatoum@pengutronix.de> wrote:
>
> The gpio-siox driver uses handle_nested_irq() to implement its
> interrupt support. This is only capable of handling threaded irq
> actions. For a hardirq action it triggers a NULL pointer oops.
> (It calls action->thread_fn which is NULL then.)
>
> Prevent registration of a hardirq action by setting
> gpio_irq_chip::threaded to true.
>
> Cc: u.kleine-koenig@pengutronix.de
> Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
> ---

Could you add a Fixes tag? This looks like stable material.

Bart