linux-kernel - Re: [PATCH -next] drm/imx: fix unused but set variable warnings

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Message-ID: <20200911064409.7dyuda6f6uxglmwa@fsr-ub1864-141>
Date:   Fri, 11 Sep 2020 09:44:09 +0300
From:   Laurentiu Palcu <laurentiu.palcu@....nxp.com>
To:     Wang ShaoBo <bobo.shaobowang@...wei.com>
Cc:     cj.chengjian@...wei.com, huawei.libin@...wei.com, agx@...xcpu.org,
        l.stach@...gutronix.de, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH -next] drm/imx: fix unused but set variable warnings

On Fri, Sep 11, 2020 at 09:44:14AM +0800, Wang ShaoBo wrote:
> Fix unused but set variable warning building with `make W=1`:
> 
> drivers/gpu/drm/imx/dcss/dcss-plane.c:270:6: warning:
>  variable ‘pixel_format’ set but not used [-Wunused-but-set-variable]
>   u32 pixel_format;
>       ^~~~~~~~~~~~
> 
> Fixes: 9021c317b770 ("drm/imx: Add initial support for DCSS on iMX8MQ")
> Reported-by: Hulk Robot <hulkci@...wei.com>
> Signed-off-by: Wang ShaoBo <bobo.shaobowang@...wei.com>

pixel_format will be used in the next patches that will follow the
initial one and I probably forgot to remove it when I split the patches.
But, I guess, we could remove it for now to make the bots happy.

Reviewed-by: Laurentiu Palcu <laurentiu.palcu@....nxp.com>

> ---
>  drivers/gpu/drm/imx/dcss/dcss-plane.c | 2 --
>  1 file changed, 2 deletions(-)
> 
> diff --git a/drivers/gpu/drm/imx/dcss/dcss-plane.c b/drivers/gpu/drm/imx/dcss/dcss-plane.c
> index 961d671f171b..e13652e3a115 100644
> --- a/drivers/gpu/drm/imx/dcss/dcss-plane.c
> +++ b/drivers/gpu/drm/imx/dcss/dcss-plane.c
> @@ -267,7 +267,6 @@ static void dcss_plane_atomic_update(struct drm_plane *plane,
>  	struct dcss_plane *dcss_plane = to_dcss_plane(plane);
>  	struct dcss_dev *dcss = plane->dev->dev_private;
>  	struct drm_framebuffer *fb = state->fb;
> -	u32 pixel_format;
>  	struct drm_crtc_state *crtc_state;
>  	bool modifiers_present;
>  	u32 src_w, src_h, dst_w, dst_h;
> @@ -277,7 +276,6 @@ static void dcss_plane_atomic_update(struct drm_plane *plane,
>  	if (!fb || !state->crtc || !state->visible)
>  		return;
>  
> -	pixel_format = state->fb->format->format;
>  	crtc_state = state->crtc->state;
>  	modifiers_present = !!(fb->flags & DRM_MODE_FB_MODIFIERS);
>  
> -- 
> 2.17.1
>