linux-kernel - Re: [PATCH] gpiolib: of: Use correct fwnode for DT-probed chips

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: <3d1f5b5e-b444-cd9f-e0fb-69f834b0d1d6@gmail.com>
Date:   Sat, 12 Nov 2022 13:59:44 +0100
From:   Robert Marko <robimarko@...il.com>
To:     Thierry Reding <thierry.reding@...il.com>,
        Bartosz Golaszewski <brgl@...ev.pl>,
        Linus Walleij <linus.walleij@...aro.org>
Cc:     Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Dmitry Torokhov <dmitry.torokhov@...il.com>,
        linux-gpio@...r.kernel.org, linux-kernel@...r.kernel.org,
        Marek Szyprowski <m.szyprowski@...sung.com>
Subject: Re: [PATCH] gpiolib: of: Use correct fwnode for DT-probed chips


On 11. 11. 2022. 12:37, Thierry Reding wrote:
> From: Thierry Reding <treding@...dia.com>
>
> The OF node store in chip->fwnode is used to explicitly override the FW
> node for a GPIO chip. For chips that use the default FW node (i.e. that
> of their parent device), this will be NULL and cause the chip not to be
> fully registered.
>
> Instead, use the GPIO device's FW node, which is set to either the node
> of the parent device or the explicit override in chip->fwnode.
>
> Fixes: 8afe82550240 ("gpiolib: of: Prepare of_gpiochip_add() / of_gpiochip_remove() for fwnode")
> Tested-by: Marek Szyprowski <m.szyprowski@...sung.com>
> Signed-off-by: Thierry Reding <treding@...dia.com>

Hi, I can confirm this fixes the blamed commit on Qualcomm IPQ8074.

Tested-by: Robert Marko <robimarko@...il.com>

> ---
>   drivers/gpio/gpiolib-of.c | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/gpio/gpiolib-of.c b/drivers/gpio/gpiolib-of.c
> index 4be3c21aa718..55c3712592db 100644
> --- a/drivers/gpio/gpiolib-of.c
> +++ b/drivers/gpio/gpiolib-of.c
> @@ -1067,7 +1067,7 @@ int of_gpiochip_add(struct gpio_chip *chip)
>   	struct device_node *np;
>   	int ret;
>   
> -	np = to_of_node(chip->fwnode);
> +	np = to_of_node(dev_fwnode(&chip->gpiodev->dev));
>   	if (!np)
>   		return 0;
>