linux-kernel - Re: [PATCH] pinctrl: stm32: fix optional IRQ support to gpios

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Message-ID: <CACRpkdZQNs6BgchbxFN4rHzk41xUnJKcxKTi78xTduq32y4urQ@mail.gmail.com>
Date:   Tue, 28 Jun 2022 16:13:18 +0200
From:   Linus Walleij <linus.walleij@...aro.org>
To:     Fabien Dessenne <fabien.dessenne@...s.st.com>
Cc:     Maxime Coquelin <mcoquelin.stm32@...il.com>,
        Alexandre Torgue <alexandre.torgue@...s.st.com>,
        linux-gpio@...r.kernel.org,
        linux-stm32@...md-mailman.stormreply.com,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] pinctrl: stm32: fix optional IRQ support to gpios

On Mon, Jun 27, 2022 at 4:24 PM Fabien Dessenne
<fabien.dessenne@...s.st.com> wrote:

> To act as an interrupt controller, a gpio bank relies on the
> "interrupt-parent" of the pin controller.
> When this optional "interrupt-parent" misses, do not create any IRQ domain.
>
> This fixes a "NULL pointer in stm32_gpio_domain_alloc()" kernel crash when
> the interrupt-parent = <exti> property is not declared in the Device Tree.
>
> Fixes: 0eb9f683336d ("pinctrl: Add IRQ support to STM32 gpios")
>
> Signed-off-by: Fabien Dessenne <fabien.dessenne@...s.st.com>

Patch applied for fixes.

Yours,
Linus Walleij