linux-kernel - Re: Broken GPIO IRQ mappings in 5.18-rc2

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Date:   Thu, 14 Apr 2022 23:57:46 +0200
From:   Linus Walleij <linus.walleij@...aro.org>
To:     "Limonciello, Mario" <mario.limonciello@....com>,
        Marc Zyngier <maz@...nel.org>
Cc:     Shreeya Patel <shreeya.patel@...labora.com>,
        "stable@...r.kernel.org" <stable@...r.kernel.org>,
        Andy Shevchenko <andy.shevchenko@...il.com>,
        Bartosz Golaszewski <brgl@...ev.pl>,
        "open list:GPIO SUBSYSTEM" <linux-gpio@...r.kernel.org>,
        open list <linux-kernel@...r.kernel.org>,
        "Gong, Richard" <Richard.Gong@....com>,
        "Natikar, Basavaraj" <Basavaraj.Natikar@....com>
Subject: Re: Broken GPIO IRQ mappings in 5.18-rc2

On Thu, Apr 14, 2022 at 3:21 AM Limonciello, Mario
<Mario.Limonciello@....com> wrote:

> [Public]
>
> Hi,
>
> I noticed on a variety of machines that power button wasn't working anymore starting with 5.18-rc2.
> In digging deeper, I notice that a new error is introduced as well during bootup:
>
> [    0.688318] amd_gpio AMDI0030:00: Failed to translate GPIO pin 0x0000 to IRQ, err -517
> [    0.688337] amd_gpio AMDI0030:00: Failed to translate GPIO pin 0x002C to IRQ, err -517
> [    0.688348] amd_gpio AMDI0030:00: Failed to translate GPIO pin 0x003D to IRQ, err -517
> [    0.688359] amd_gpio AMDI0030:00: Failed to translate GPIO pin 0x003E to IRQ, err -517
> [    0.688369] amd_gpio AMDI0030:00: Failed to translate GPIO pin 0x003A to IRQ, err -517
> [    0.688379] amd_gpio AMDI0030:00: Failed to translate GPIO pin 0x003B to IRQ, err -517
> [    0.688389] amd_gpio AMDI0030:00: Failed to translate GPIO pin 0x0002 to IRQ, err -517
> [    0.688399] amd_gpio AMDI0030:00: Failed to translate GPIO pin 0x0011 to IRQ, err -517
> [    0.688410] amd_gpio AMDI0030:00: Failed to translate GPIO pin 0x0012 to IRQ, err -517
> [    0.688420] amd_gpio AMDI0030:00: Failed to translate GPIO pin 0x0007 to IRQ, err -517
>
> It looks like IRQs aren't getting assigned to the GPIO pins anymore and instead showing this deferred probing message in 5.18-rc2.
> I bisected and confirmed it's caused by
> commit 5467801f1fcbdc46bc7298a84dbf3ca1ff2a7320 ("gpio: Restrict usage of GPIO chip irq members before initialization")
>
> I don't see that probing ever gets a chance to run again though as it just shows the dev_err and returns AE_OK for the
> function that walks _AEI (acpi_gpiochip_alloc_event).
>
> FYI - I'm CC'ing stable because this commit went to stable too.

Paging Marc Zyngier as IRQ maintainer. He might have suggestions.

Torvalds already pointedly complained about the semantics in this patch,
should it simply be reverted?

Yours,
Linus Walleij