lkml.org 
[lkml]   [2026]   [May]   [5]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
Date
From
SubjectRe: [PATCH] pinctrl: sunxi: fix regulator leak in sunxi_pmx_request() error path
On Mon, 04 May 2026 22:53:26 +0800
Felix Gu <ustc.gu@gmail.com> wrote:

> In the error path of sunxi_pmx_request(), the code calls
> regulator_put(s_reg->regulator) to release the regulator. However,
> s_reg->regulator is only assigned after a successful regulator_enable().
> This causes a memory leak: the regulator obtained via regulator_get()
> is never properly released when regulator_enable() fails.

Yes, that's a correct observation. The fix looks alright, though I
wonder if we should drop the "goto" here altogether, since there is only
one caller, and the code would look better like this:

ret = regulator_enable(reg);
if (ret) {
dev_err(pctl->dev, ...
regulator_put(reg);
return ret;
}
...

> Fixes: dc1445584177 ("pinctrl: sunxi: Fix and simplify pin bank regulator handling")
> Signed-off-by: Felix Gu <ustc.gu@gmail.com>

Regardless, the fix is correct, so:

Reviewed-by: Andre Przywara <andre.przywara@arm.com>

Cheers,
Andre

> ---
> drivers/pinctrl/sunxi/pinctrl-sunxi.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/pinctrl/sunxi/pinctrl-sunxi.c b/drivers/pinctrl/sunxi/pinctrl-sunxi.c
> index d3042e0c9712..25489beeb312 100644
> --- a/drivers/pinctrl/sunxi/pinctrl-sunxi.c
> +++ b/drivers/pinctrl/sunxi/pinctrl-sunxi.c
> @@ -925,7 +925,7 @@ static int sunxi_pmx_request(struct pinctrl_dev *pctldev, unsigned offset)
> return 0;
>
> out:
> - regulator_put(s_reg->regulator);
> + regulator_put(reg);
>
> return ret;
> }
>
> ---
> base-commit: b9303e6bff706758c167af686b5315ad00233bf8
> change-id: 20260504-sunxi-cda91661c181
>
> Best regards,


\
 
 \ /
  Last update: 2026-05-05 01:37    [W:0.052 / U:4.741 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and my Meterkast|Read the blog