linux-kernel - Re: [PATCH] pinctrl: meson: amlogic-a4: mark the GPIO controller as sleeping

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <7dc8a830-5863-412c-bcf3-498f47b35615@amlogic.com>
Date: Tue, 6 Jan 2026 17:32:46 +0800
From: Xianwei Zhao <xianwei.zhao@...ogic.com>
To: Neil Armstrong <neil.armstrong@...aro.org>,
 Bartosz Golaszewski <bartosz.golaszewski@....qualcomm.com>,
 Linus Walleij <linusw@...nel.org>, Kevin Hilman <khilman@...libre.com>,
 Jerome Brunet <jbrunet@...libre.com>,
 Martin Blumenstingl <martin.blumenstingl@...glemail.com>,
 Bartosz Golaszewski <brgl@...nel.org>
Cc: linux-gpio@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
 linux-amlogic@...ts.infradead.org, linux-kernel@...r.kernel.org,
 stable@...r.kernel.org
Subject: Re: [PATCH] pinctrl: meson: amlogic-a4: mark the GPIO controller as
 sleeping

Hi Bartosz,
    Could you explain the reproduction method for this problem ?

On 2026/1/6 16:55, Neil Armstrong wrote:
> The GPIO controller is configured as non-sleeping but it uses generic
> pinctrl helpers which use a mutex for synchronization. This will cause
> lockdep splats when used together with shared GPIOs going through the
> GPIO shared proxy driver.
> 
> Fixes: 6e9be3abb78c ("pinctrl: Add driver support for Amlogic SoCs")
> Cc: stable@...r.kernel.org
> Reported-by: Martin Blumenstingl <martin.blumenstingl@...glemail.com>
> Closes: 
> https://lore.kernel.org/all/CAFBinCAc7CO8gfNQakCu3LfkYXuyTd2iRpMRm8EKXSL0mwOnJw@mail.gmail.com/
> Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@....qualcomm.com>
> ---
>    drivers/pinctrl/meson/pinctrl-amlogic-a4.c | 2 +-
>    1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/pinctrl/meson/pinctrl-amlogic-a4.c 
> b/drivers/pinctrl/meson/pinctrl-amlogic-a4.c
> index d9e3a8d5932a..ded7b218e2ec 100644
> --- a/drivers/pinctrl/meson/pinctrl-amlogic-a4.c
> +++ b/drivers/pinctrl/meson/pinctrl-amlogic-a4.c
> @@ -893,7 +893,7 @@ static const struct gpio_chip aml_gpio_template = {
>        .direction_input        = aml_gpio_direction_input,
>        .direction_output       = aml_gpio_direction_output,
>        .get_direction          = aml_gpio_get_direction,
> -     .can_sleep              = false,
> +     .can_sleep              = true,
>    };
> 
>    static void init_bank_register_bit(struct aml_pinctrl *info,