ACK/Cmnt: [SRU][F:linux-bluefield][PATCH v1 0/3] UBUNTU: SAUCE: pwr-mlxbf: Several bug fixes for focal

[Bartlomiej Zolnierkiewicz]

The first two patches seem to be workarounds for the issues in the
different parts of the kernel. However since the patches should be
harmless and fixing the real sources of the problems may be difficult
and complicated:

Acked-by: Bartlomiej Zolnierkiewicz <bartlomiej.zolnierkiewicz at canonical.com>

On Mon, Oct 30, 2023 at 9:07 PM Asmaa Mnebhi <asmaa at nvidia.com> wrote:
>
> BugLink: https://bugs.launchpad.net/bugs/2041996
>
> SRU Justification:
>
> [Impact]
>
> There is are several changes that needs to be made to pwr-mlxbf in focal:
> * There is a race condition between gpio-mlxbf2.c driver being loaded and pwr-mlxbf.c being loaded
> * When the module is removed, there is a panic due to NULL pointer access
> * soft reset needs to be replaced by graceful reboot
>
> [Fix]
>
> * Fix race condition between gpio-mlxbf2.c driver being loaded and pwr-mlxbf.c being loaded
> * Fix panic due to access to NULL pointer when driver is removed via rmmod
> * support graceful reboot instead of soft reset
>
> [Test Case]
>
> * all test cases are for BF2:
> * trigger the gpio toggling from the BMC: ipmitool raw 0x32 0xA1 0x02
>   This should trigger a graceful reboot of the DPU.
> * rmmod/modprobe
> * reboot test and make sure the driver is always loaded
>
> [Regression Potential]
>
> * Run the 100 reboot test and make sure that the driver is loaded with no issues. That the gpio graceful reboot works.
>