linux-kernel - Re: [PATCH 1/1] DRM-tilcdc: Deletion of an unnecessary check before the function call "drm_fbdev_cma_hotplug

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Date:	Thu, 20 Nov 2014 05:11:38 +0100
From:	Thierry Reding <thierry.reding@...il.com>
To:	SF Markus Elfring <elfring@...rs.sourceforge.net>,
	David Airlie <airlied@...ux.ie>,
	<dri-devel@...ts.freedesktop.org>
CC:	LKML <linux-kernel@...r.kernel.org>,
	<kernel-janitors@...r.kernel.org>,
	Julia Lawall <julia.lawall@...6.fr>
Subject: Re: [PATCH 1/1] DRM-tilcdc: Deletion of an unnecessary check before the function call "drm_fbdev_cma_hotplug_event"

On November 19, 2014 5:28:59 PM SF Markus Elfring 
<elfring@...rs.sourceforge.net> wrote:
> From: Markus Elfring <elfring@...rs.sourceforge.net>
> Date: Wed, 19 Nov 2014 17:05:20 +0100
>
> The drm_fbdev_cma_hotplug_event() function tests whether its argument is NULL
> and then returns immediately. Thus the test around the call is not needed.
>
> This issue was detected by using the Coccinelle software.
>
> Signed-off-by: Markus Elfring <elfring@...rs.sourceforge.net>
> ---
>  drivers/gpu/drm/tilcdc/tilcdc_drv.c | 3 +--
>  1 file changed, 1 insertion(+), 2 deletions(-)
>
> diff --git a/drivers/gpu/drm/tilcdc/tilcdc_drv.c 
> b/drivers/gpu/drm/tilcdc/tilcdc_drv.c
> index 000428e..335b1dc 100644
> --- a/drivers/gpu/drm/tilcdc/tilcdc_drv.c
> +++ b/drivers/gpu/drm/tilcdc/tilcdc_drv.c
> @@ -58,8 +58,7 @@ static struct drm_framebuffer *tilcdc_fb_create(struct 
> drm_device *dev,
>  static void tilcdc_fb_output_poll_changed(struct drm_device *dev)
>  {
>  	struct tilcdc_drm_private *priv = dev->dev_private;
> -	if (priv->fbdev)
> -		drm_fbdev_cma_hotplug_event(priv->fbdev);
> +	drm_fbdev_cma_hotplug_event(priv->fbdev);
>  }
>
>  static const struct drm_mode_config_funcs mode_config_funcs = {

Reviewed-by: Thierry Reding <thierry.reding@...il.com>


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