Re: [PATCH v3 13/79] media: s5p: fix pm_runtime_get_sync() usage count

[Marek Szyprowski]

On 27.04.2021 12:26, Mauro Carvalho Chehab wrote:
> The pm_runtime_get_sync() internally increments the
> dev->power.usage_count without decrementing it, even on errors.
> Replace it by the new pm_runtime_resume_and_get(), introduced by:
> commit dd8088d5a896 ("PM: runtime: Add pm_runtime_resume_and_get to deal with usage counter")
> in order to properly decrement the usage counter and avoid memory
> leaks.
>
> While here, check if the PM runtime error was caught at
> s5p_cec_adap_enable().
>
> Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@xxxxxxxxxx>
Acked-by: Marek Szyprowski <m.szyprowski@xxxxxxxxxxx>
> ---
>   drivers/media/cec/platform/s5p/s5p_cec.c | 5 ++++-
>   1 file changed, 4 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/media/cec/platform/s5p/s5p_cec.c b/drivers/media/cec/platform/s5p/s5p_cec.c
> index 2a3e7ffefe0a..2250c1cbc64e 100644
> --- a/drivers/media/cec/platform/s5p/s5p_cec.c
> +++ b/drivers/media/cec/platform/s5p/s5p_cec.c
> @@ -35,10 +35,13 @@ MODULE_PARM_DESC(debug, "debug level (0-2)");
>   
>   static int s5p_cec_adap_enable(struct cec_adapter *adap, bool enable)
>   {
> +	int ret;
>   	struct s5p_cec_dev *cec = cec_get_drvdata(adap);
>   
>   	if (enable) {
> -		pm_runtime_get_sync(cec->dev);
> +		ret = pm_runtime_resume_and_get(cec->dev);
> +		if (ret < 0)
> +			return ret;
>   
>   		s5p_cec_reset(cec);
>   

Best regards
-- 
Marek Szyprowski, PhD
Samsung R&D Institute Poland