linux-kernel - Re: [PATCH] media: staging: tegra-vde: add missing pm_runtime_put

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Message-ID: <7061eb81-c00c-9978-5e4b-f9896c0ffd5e@nvidia.com>
Date:   Fri, 5 Jun 2020 07:00:47 +0100
From:   Jon Hunter <jonathanh@...dia.com>
To:     Navid Emamdoost <navid.emamdoost@...il.com>,
        Dmitry Osipenko <digetx@...il.com>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Thierry Reding <thierry.reding@...il.com>,
        <linux-media@...r.kernel.org>, <linux-tegra@...r.kernel.org>,
        <devel@...verdev.osuosl.org>, <linux-kernel@...r.kernel.org>
CC:     <emamd001@....edu>, <wu000273@....edu>, <kjlu@....edu>,
        <smccaman@....edu>
Subject: Re: [PATCH] media: staging: tegra-vde: add missing
 pm_runtime_put_autosuspend


On 02/06/2020 06:48, Navid Emamdoost wrote:
> Call to pm_runtime_get_sync increments counter even in case of
> failure leading to incorrect ref count.
> Call pm_runtime_put_autosuspend if pm_runtime_get_sync fails.
> 
> Signed-off-by: Navid Emamdoost <navid.emamdoost@...il.com>
> ---
>  drivers/staging/media/tegra-vde/vde.c | 4 +++-
>  1 file changed, 3 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/staging/media/tegra-vde/vde.c b/drivers/staging/media/tegra-vde/vde.c
> index d3e63512a765..52cdd4a91e93 100644
> --- a/drivers/staging/media/tegra-vde/vde.c
> +++ b/drivers/staging/media/tegra-vde/vde.c
> @@ -776,8 +776,10 @@ static int tegra_vde_ioctl_decode_h264(struct tegra_vde *vde,
>  		goto release_dpb_frames;
>  
>  	ret = pm_runtime_get_sync(dev);
> -	if (ret < 0)
> +	if (ret < 0) {
> +		pm_runtime_put_autosuspend(dev);
>  		goto unlock;
> +	}
>  
>  	/*
>  	 * We rely on the VDE registers reset value, otherwise VDE

Please use the put in the error path.

Jon

-- 
nvpublic