linux-kernel - Re: [PATCH] pinctrl: amd: Add IRQF_ONESHOT to the interrupt request

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Date: Tue, 23 Jan 2024 19:20:01 +0100
From: "Rafael J. Wysocki" <rafael@...nel.org>
To: Mario Limonciello <mario.limonciello@....com>
Cc: Linus Walleij <linus.walleij@...aro.org>, Basavaraj Natikar <Basavaraj.Natikar@....com>, 
	Shyam Sundar S K <Shyam-sundar.S-k@....com>, 
	"Rafael J . Wysocki" <rafael.j.wysocki@...el.com>, 
	"open list:PIN CONTROL SUBSYSTEM" <linux-gpio@...r.kernel.org>, open list <linux-kernel@...r.kernel.org>, 
	"Rafael J . Wysocki" <rafael@...nel.org>, Christian Heusel <christian@...sel.eu>
Subject: Re: [PATCH] pinctrl: amd: Add IRQF_ONESHOT to the interrupt request

On Tue, Jan 23, 2024 at 7:08 PM Mario Limonciello
<mario.limonciello@....com> wrote:
>
> On some systems the interrupt is shared between GPIO controller
> and ACPI SCI. When the interrupt is shared with the ACPI SCI the
> flags need to be identical.
>
> This should fix the GPIO controller failing to work after commit
> 7a36b901a6eb ("ACPI: OSL: Use a threaded interrupt handler for SCI").
> ```
> [    0.417335] genirq: Flags mismatch irq 9. 00000088 (pinctrl_amd) vs. 00002080 (acpi)
> [    0.420073] amd_gpio: probe of AMDI0030:00 failed with error -16
> ```
>
> Cc: Rafael J. Wysocki <rafael@...nel.org>
> Reported-by: Christian Heusel <christian@...sel.eu>
> Closes: https://bugzilla.kernel.org/show_bug.cgi?id=218407
> Fixes: 7a36b901a6eb ("ACPI: OSL: Use a threaded interrupt handler for SCI")
> Link: https://lore.kernel.org/linux-acpi/CAJZ5v0iRqUXeuKmC_+dAJtDBLWQ3x15n4gRH48y7MEaLoXF+UA@mail.gmail.com/T/#mc5506014141b61e472b24e095889535a04458083
> Signed-off-by: Mario Limonciello <mario.limonciello@....com>

Acked-by: Rafael J. Wysocki <rafael@...nel.org>

> ---
>  drivers/pinctrl/pinctrl-amd.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/pinctrl/pinctrl-amd.c b/drivers/pinctrl/pinctrl-amd.c
> index ca4a247c2cd1..6a33b584976c 100644
> --- a/drivers/pinctrl/pinctrl-amd.c
> +++ b/drivers/pinctrl/pinctrl-amd.c
> @@ -1162,7 +1162,7 @@ static int amd_gpio_probe(struct platform_device *pdev)
>         }
>
>         ret = devm_request_irq(&pdev->dev, gpio_dev->irq, amd_gpio_irq_handler,
> -                              IRQF_SHARED, KBUILD_MODNAME, gpio_dev);
> +                              IRQF_SHARED | IRQF_ONESHOT, KBUILD_MODNAME, gpio_dev);

Or if adding IRQF_ONESHOT here is not acceptable, IRQF_PROBE_SHARED
can be used too.

>         if (ret)
>                 goto out2;
>
> --