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SubjectRe: [PATCH] media: staging: tegra-vde: fix runtime pm imbalance on error
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20.05.2020 12:51, Dinghao Liu пишет:
> pm_runtime_get_sync() increments the runtime PM usage counter even
> it returns an error code. Thus a pairing decrement is needed on
> the error handling path to keep the counter balanced.
>
> Signed-off-by: Dinghao Liu <dinghao.liu@zju.edu.cn>
> ---
> drivers/staging/media/tegra-vde/vde.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/staging/media/tegra-vde/vde.c b/drivers/staging/media/tegra-vde/vde.c
> index d3e63512a765..dd134a3a15c7 100644
> --- a/drivers/staging/media/tegra-vde/vde.c
> +++ b/drivers/staging/media/tegra-vde/vde.c
> @@ -777,7 +777,7 @@ static int tegra_vde_ioctl_decode_h264(struct tegra_vde *vde,
>
> ret = pm_runtime_get_sync(dev);
> if (ret < 0)
> - goto unlock;
> + goto put_runtime_pm;
>
> /*
> * We rely on the VDE registers reset value, otherwise VDE
>

Hello Dinghao,

Thank you for the patch. I sent out a similar patch a week ago [1].

[1]
https://patchwork.ozlabs.org/project/linux-tegra/patch/20200514210847.9269-2-digetx@gmail.com/

The pm_runtime_put_noidle() should have the same effect as yours
variant, although my variant won't change the last_busy RPM time, which
I think is a bit more appropriate behavior.

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