Re: [PATCH] platform/x86/amd/pmf: Fix power supply leak in amd_pmf_get_battery_prop()

[Mario Limonciello <superm1@kernel.org>]

On 9/17/26 09:01, Wentao Liang wrote:
> power_supply_get_by_name() takes a reference that is only dropped on
> the error path of power_supply_get_property(). Drop it as soon as the
> property has been read and stop searching, so that a successful lookup
> does not leak the reference.
> 
> Fixes: f4627dfd0e19 ("platform/x86/amd/pmf: Add support to get inputs from other subsystems")
> Cc: stable@vger.kernel.org
> Signed-off-by: Wentao Liang <vulab@iscas.ac.cn>
Reviewed-by: Mario Limonciello (AMD) <superm1@kernel.org>> ---
>   drivers/platform/x86/amd/pmf/spc.c | 7 ++++---
>   1 file changed, 4 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/platform/x86/amd/pmf/spc.c b/drivers/platform/x86/amd/pmf/spc.c
> index f48678a23cc7..cd957d7a4e48 100644
> --- a/drivers/platform/x86/amd/pmf/spc.c
> +++ b/drivers/platform/x86/amd/pmf/spc.c
> @@ -249,10 +249,11 @@ static int amd_pmf_get_battery_prop(enum power_supply_property prop)
>   			continue;
>   
>   		ret = power_supply_get_property(psy, prop, &value);
> -		if (ret) {
> -			power_supply_put(psy);
> +		power_supply_put(psy);
> +		if (ret)
>   			return ret;
> -		}
> +
> +		break;
>   	}
>   
>   	return value.intval;