APPLIED: [SRU][J:linux-bluefield][PATCH v2 0/1] UBUNTU: SAUCE: gpio-mlxbf3: support valid mask

[Bartlomiej Zolnierkiewicz]

Applied to jammy:linux-bluefield/master-next. Thanks.

--
Best regards,
Bartlomiej

On Tue, Oct 10, 2023 at 7:07 PM Asmaa Mnebhi <asmaa at nvidia.com> wrote:
>
> BugLink: https://bugs.launchpad.net/bugs/2038868
>
> SRU Justification:
>
> [Impact]
>
> After syncing up the gpio-mlxbf3.c driver with the upstreamed version,
> we dropped the use of the valid_mask variable because kernels greater
> or equal to 6.2.0 dont need it.
> This is no longer needed in kernel versions >= 6.2.0 because valid_mask
> is populated by core gpio code.
> 5.15 kernel doesnt support that feature so we still need to explicitly
> define valid_mask like we did before.
> This doesnt impact the functionality of the GPIO driver but it is a
> security breach as it doesnt restrict the access to only gpios defined
> in the acpi table by valid_mask.
>
> [Fix]
>
> * define valid_mask and init_valid_mask
>
> [Test Case]
>
> * Make sure that the user (libgpiod) cannot access any other gpio besides
>   0->4 (gpiochip0) and 22-23 in gpiochip1.
>
> [Regression Potential]
>
> no known regression.
>