Re: [PATCH v2 2/4] pmdomain: rockchip: fix clock leak on domain probe failure

["Diederik de Haas" <diederik@cknow-tech.com>]

On Sat Sep 19, 2026 at 2:35 AM CEST, Shawn Lin wrote:
> When of_clk_get() failed in the middle of the loop, the references of
> the clocks acquired so far were leaked instead of being released by
> the error path.
>
> Also switch the clks array allocation from devm_kcalloc() to
> devm_kzalloc() so that clk_bulk_put() cannot run over uninitialized
> entries.
>
> Fixes: d909072d0521 ("soc: rockchip: power-domain: use clk_bulk APIs")
> Signed-off-by: Shawn Lin <shawn.lin@rock-chips.com>
> Reviewed-by: Sebastian Reichel <sebastian.reichel@collabora.com>
> ---
>
> Changes in v2:
> - switch to use devm_kzalloc()
> - add Sebastian's tag
>
>  drivers/pmdomain/rockchip/pm-domains.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/pmdomain/rockchip/pm-domains.c b/drivers/pmdomain/rockchip/pm-domains.c
> index 068dd4b3..43fdb7f 100644
> --- a/drivers/pmdomain/rockchip/pm-domains.c
> +++ b/drivers/pmdomain/rockchip/pm-domains.c
> @@ -825,7 +825,7 @@ static int rockchip_pm_add_one_domain(struct rockchip_pmu *pmu,
>  
>  	pd->num_clks = of_clk_get_parent_count(node);
>  	if (pd->num_clks > 0) {
> -		pd->clks = devm_kcalloc(pmu->dev, pd->num_clks,
> +		pd->clks = devm_kzalloc(pmu->dev, pd->num_clks,
>  					sizeof(*pd->clks), GFP_KERNEL);

/media/nvme/dev/debian/salsa/kernel-team/linux/drivers/pmdomain/rockchip/pm-domains.c: In function ‘rockchip_pm_add_one_domain’:
/media/nvme/dev/debian/salsa/kernel-team/linux/drivers/pmdomain/rockchip/pm-domains.c:840:28: error: too many arguments to function ‘devm_kzalloc’; expected 3, have 4
  840 |                 pd->clks = devm_kzalloc(pmu->dev, pd->num_clks,
      |                            ^~~~~~~~~~~~
In file included from /media/nvme/dev/debian/salsa/kernel-team/linux/include/linux/device.h:31,
                 from /media/nvme/dev/debian/salsa/kernel-team/linux/include/linux/platform_device.h:13,
                 from /media/nvme/dev/debian/salsa/kernel-team/linux/drivers/pmdomain/rockchip/pm-domains.c:13:
/media/nvme/dev/debian/salsa/kernel-team/linux/include/linux/device/devres.h:48:21: note: declared here
   48 | static inline void *devm_kzalloc(struct device *dev, size_t size, gfp_t gfp)
      |                     ^~~~~~~~~~~~

Seems legit:
https://elixir.bootlin.com/linux/v7.3-rc3/source/include/linux/device/devres.h#L48

Cheers,
  Diederik

>  		if (!pd->clks)
>  			return -ENOMEM;
> @@ -842,7 +842,7 @@ static int rockchip_pm_add_one_domain(struct rockchip_pmu *pmu,
>  			dev_err(pmu->dev,
>  				"%pOFn: failed to get clk at index %d: %d\n",
>  				node, i, error);
> -			return error;
> +			goto err_put_clocks;
>  		}
>  	}
>