[PATCH 0/9] pmdomain: Convert to platform remove callback returning void

[Ulf Hansson]

On Fri, 24 Nov 2023 at 09:10, Uwe Kleine-König
<u.kleine-koenig at pengutronix.de> wrote:
>
> Hello,
>
> this patch set converts all drivers below drivers/pmdomain to use struct
> platform_driver::remove_new(). See commit 5c5a7680e67b ("platform:
> Provide a remove callback that returns no value") for an extended
> explanation and the eventual goal.
>
> While working on drivers/pmdomain/imx/gpc.c I noticed three issues, but
> didn't address them:
>
>  - The driver uses builtin_platform_driver twice. The documentation
>    however mandates that "Each driver may only use this macro once".
>    I don't know if the documentation is wrong and using it twice works
>    as intended.
>
>  - imx_gpc_remove() only removes two PDs, but there might be up to four?!
>
>  - In imx_gpc_remove() if
>    pm_genpd_remove(&imx_gpc_domains[GPC_PGC_DOMAIN_PU].base) fails,
>    removing the ARM PD is skipped. So together with the previous item
>    the driver leaks up to three genpd instances.
>
> Maybe someone caring for this driver will pick these up and prepare
> patches? Ideally pm_genpd_remove() should return void caring for still
> existing providers, parents and devices in generic code. I think that
> erroring out in genpd_remove() before the PM domain is removed from the
> various lists might result in use-after-free errors.
>
> Best regards
> Uwe
>
> Uwe Kleine-König (9):
>   pmdomain: imx-pgc: Convert to platform remove callback returning void
>   pmdomain: imx-gpc: Convert to platform remove callback returning void
>   pmdomain: imx-gpcv2: Convert to platform remove callback returning
>     void
>   pmdomain: imx8m-blk-ctrl: Convert to platform remove callback
>     returning void
>   pmdomain: imx8mp-blk-ctrl: Convert to platform remove callback
>     returning void
>   pmdomain: imx93-blk-ctrl: Convert to platform remove callback
>     returning void
>   pmdomain: imx93-pd: Convert to platform remove callback returning void
>   pmdomain: qcom-cpr: Convert to platform remove callback returning void
>   pmdomain: xilinx/zynqmp: Convert to platform remove callback returning
>     void
>
>  drivers/pmdomain/imx/gpc.c                  | 28 +++++++++++----------
>  drivers/pmdomain/imx/gpcv2.c                |  6 ++---
>  drivers/pmdomain/imx/imx8m-blk-ctrl.c       |  6 ++---
>  drivers/pmdomain/imx/imx8mp-blk-ctrl.c      |  6 ++---
>  drivers/pmdomain/imx/imx93-blk-ctrl.c       |  6 ++---
>  drivers/pmdomain/imx/imx93-pd.c             |  6 ++---
>  drivers/pmdomain/qcom/cpr.c                 |  6 ++---
>  drivers/pmdomain/xilinx/zynqmp-pm-domains.c |  6 ++---
>  8 files changed, 29 insertions(+), 41 deletions(-)
>

The series applied for next, thanks!

Kind regards
Uffe