linux-kernel - Re: [PATCH] drm/panel: vtdr6130: fix unused ret in visionox_vtdr6130_bl_update

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Message-ID: <Y8lO1cSkh/eZFd23@ravnborg.org>
Date:   Thu, 19 Jan 2023 15:08:21 +0100
From:   Sam Ravnborg <sam@...nborg.org>
To:     Neil Armstrong <neil.armstrong@...aro.org>
Cc:     Thierry Reding <thierry.reding@...il.com>,
        David Airlie <airlied@...il.com>,
        Richard Acayan <mailingradian@...il.com>,
        dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
        Daniel Vetter <daniel@...ll.ch>,
        kernel test robot <lkp@...el.com>
Subject: Re: [PATCH] drm/panel: vtdr6130: fix unused ret in
 visionox_vtdr6130_bl_update_status

On Thu, Jan 19, 2023 at 03:04:12PM +0100, Neil Armstrong wrote:
> Fix the following warning:
> panel-visionox-vtdr6130.c:249:12: warning: 'ret' is used uninitialized [-Wuninitialized]
> 
> Fixes: 9402cde9347e ("drm/panel: vtdr6130: Use 16-bit brightness function")
> Reported-by: Daniel Vetter <daniel@...ll.ch>
> Reported-by: kernel test robot <lkp@...el.com>
> Signed-off-by: Neil Armstrong <neil.armstrong@...aro.org>
Reviewed-by: Sam Ravnborg <sam@...nborg.org>
> ---
>  drivers/gpu/drm/panel/panel-visionox-vtdr6130.c | 7 +------
>  1 file changed, 1 insertion(+), 6 deletions(-)
> 
> diff --git a/drivers/gpu/drm/panel/panel-visionox-vtdr6130.c b/drivers/gpu/drm/panel/panel-visionox-vtdr6130.c
> index 1092075b31a5..bb0dfd86ea67 100644
> --- a/drivers/gpu/drm/panel/panel-visionox-vtdr6130.c
> +++ b/drivers/gpu/drm/panel/panel-visionox-vtdr6130.c
> @@ -243,13 +243,8 @@ static int visionox_vtdr6130_bl_update_status(struct backlight_device *bl)
>  {
>  	struct mipi_dsi_device *dsi = bl_get_data(bl);
>  	u16 brightness = backlight_get_brightness(bl);
> -	int ret;
>  
> -	mipi_dsi_dcs_set_display_brightness_large(dsi, brightness);
> -	if (ret < 0)
> -		return ret;
> -
> -	return 0;
> +	return mipi_dsi_dcs_set_display_brightness_large(dsi, brightness);
>  }
>  
>  static const struct backlight_ops visionox_vtdr6130_bl_ops = {
> 
> ---
> base-commit: 43bde505d66a41c2ad706d603e97b2c8aa2fbe4a
> change-id: 20230119-topic-sm8550-vtdr6130-fixup-fb25f686ba59
> 
> Best regards,
> -- 
> Neil Armstrong <neil.armstrong@...aro.org>