linux-kernel - Re: Linux logs new warning `gpio gpiochip0: gpiochip_add_data_with_key: get

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Message-ID: <CAMRc=McJpGMgaUDM2fHZUD7YMi2PBMcWhDWN8dU0MAr911BvXw@mail.gmail.com>
Date: Fri, 21 Feb 2025 21:53:28 +0100
From: Bartosz Golaszewski <brgl@...ev.pl>
To: Paul Menzel <pmenzel@...gen.mpg.de>
Cc: Bartosz Golaszewski <bartosz.golaszewski@...aro.org>, 
	Linus Walleij <linus.walleij@...aro.org>, linux-gpio@...r.kernel.org, 
	LKML <linux-kernel@...r.kernel.org>, linux-pci@...r.kernel.org, 
	regressions@...ts.linux.dev
Subject: Re: Linux logs new warning `gpio gpiochip0: gpiochip_add_data_with_key:
 get_direction failed: -22`

On Fri, Feb 21, 2025 at 9:40 PM Paul Menzel <pmenzel@...gen.mpg.de> wrote:
>
> Dear Bartosz,
>
>
> On the Intel Kaby Lake Dell XPS 13 9360, Linux 6.14-rc3+ with your
> commit 9d846b1aebbe (gpiolib: check the return value of
> gpio_chip::get_direction()) prints 52 new warnings:
>
>      $ dmesg
>      […]
>      [    0.000000] DMI: Dell Inc. XPS 13 9360/0596KF, BIOS 2.21.0
> 06/02/2022
>      […]
>      [    5.148927] pci 0000:00:1d.0: PCI bridge to [bus 3c]
>      [    5.150955] gpio gpiochip0: gpiochip_add_data_with_key:
> get_direction failed: -22
>      [50 times the same]
>      [    5.151639] gpio gpiochip0: gpiochip_add_data_with_key:
> get_direction failed: -22
>      [    5.151768] ACPI: PCI: Interrupt link LNKA configured for IRQ 11
>      […]
>      $ lspci -nn -k -s 1d.0
>      00:1d.0 PCI bridge [0604]: Intel Corporation Sunrise Point-LP PCI
> Express Root Port #9 [8086:9d18] (rev f1)
>         Subsystem: Dell Device [1028:075b]
>         Kernel driver in use: pcieport
>
> Judging from the commit messages, this is expected. But what should a
> user seeing this do now?
>
> Also, it probably should not be applied to the stable series, as people
> might monitor warnings and new warnings in stable series might be
> unexpected.
>
>
> Kind regards,
>
> Paul
>
>
> [1]:
> https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=9d846b1aebbe488f245f1aa463802ff9c34cc078
>

Hi!

What GPIO driver is it using? It's likely that it's not using the
provider API correctly and this change uncovered it, I'd like to take
a look at it and fix it.

Bart