linux-kernel - Re: [PATCH v2] drm/rockchip: cdn-dp: Fix error handling

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Date:   Mon, 20 Feb 2017 15:34:31 +0800
From:   Mark yao <mark.yao@...k-chips.com>
To:     Christophe JAILLET <christophe.jaillet@...adoo.fr>,
        airlied@...ux.ie, heiko@...ech.de
Cc:     dri-devel@...ts.freedesktop.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-rockchip@...ts.infradead.org, linux-kernel@...r.kernel.org,
        kernel-janitors@...r.kernel.org
Subject: Re: [PATCH v2] drm/rockchip: cdn-dp: Fix error handling

On 2017年02月20日 15:08, Christophe JAILLET wrote:
> It is likely that both 'clk_disable_unprepare()' should be called if
> 'pm_runtime_get_sync()' fails.
>
> Add a new label for that, because 'err_set_rate' is not meaningful in this
> case.
>
> Add a missing call to 'pm_runtime_put()'.
>
> Fixes: 1a0f7ed3abe2 ("drm/rockchip: cdn-dp: add cdn DP support for rk3399")
>
> Signed-off-by: Christophe JAILLET <christophe.jaillet@...adoo.fr>

looks good for me

Reviewed-by: Mark Yao <mark.yao@...k-chips.com>


> ---
> V2: rename label
>      add missing call to 'pm_runtime_put_sync()' in error path
> ---
>   drivers/gpu/drm/rockchip/cdn-dp-core.c | 3 ++-
>   1 file changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/rockchip/cdn-dp-core.c b/drivers/gpu/drm/rockchip/cdn-dp-core.c
> index 9ab67a670885..0fe1ec8b8fb1 100644
> --- a/drivers/gpu/drm/rockchip/cdn-dp-core.c
> +++ b/drivers/gpu/drm/rockchip/cdn-dp-core.c
> @@ -111,7 +111,7 @@ static int cdn_dp_clk_enable(struct cdn_dp_device *dp)
>   	ret = pm_runtime_get_sync(dp->dev);
>   	if (ret < 0) {
>   		DRM_DEV_ERROR(dp->dev, "cannot get pm runtime %d\n", ret);
> -		goto err_pclk;
> +		goto err_pm_runtime_get;
>   	}
>   
>   	reset_control_assert(dp->core_rst);
> @@ -133,6 +133,8 @@ static int cdn_dp_clk_enable(struct cdn_dp_device *dp)
>   	return 0;
>   
>   err_set_rate:
> +	pm_runtime_put(dp->dev);
> +err_pm_runtime_get:
>   	clk_disable_unprepare(dp->core_clk);
>   err_core_clk:
>   	clk_disable_unprepare(dp->pclk);


-- 
Ｍark Yao