linux-kernel - Re: [PATCH] drm/msm/dp: Remove redundant initialization of variable bpp

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Date:   Fri, 1 Oct 2021 20:43:08 +0300
From:   Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
To:     Colin King <colin.king@...onical.com>,
        Rob Clark <robdclark@...il.com>, Sean Paul <sean@...rly.run>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>, linux-arm-msm@...r.kernel.org,
        dri-devel@...ts.freedesktop.org, freedreno@...ts.freedesktop.org
Cc:     kernel-janitors@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] drm/msm/dp: Remove redundant initialization of variable
 bpp

On 29/09/2021 13:54, Colin King wrote:
> From: Colin Ian King <colin.king@...onical.com>
> 
> The variable bpp is being initialized with a value that is never
> read, it is being updated later on in both paths of an if statement.
> The assignment is redundant and can be removed.
> 
> Addresses-Coverity: ("Unused value")
> Signed-off-by: Colin Ian King <colin.king@...onical.com>

Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>

> ---
>   drivers/gpu/drm/msm/dp/dp_panel.c | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/gpu/drm/msm/dp/dp_panel.c b/drivers/gpu/drm/msm/dp/dp_panel.c
> index 2181b60e1d1d..71db10c0f262 100644
> --- a/drivers/gpu/drm/msm/dp/dp_panel.c
> +++ b/drivers/gpu/drm/msm/dp/dp_panel.c
> @@ -234,7 +234,7 @@ u32 dp_panel_get_mode_bpp(struct dp_panel *dp_panel,
>   		u32 mode_edid_bpp, u32 mode_pclk_khz)
>   {
>   	struct dp_panel_private *panel;
> -	u32 bpp = mode_edid_bpp;
> +	u32 bpp;
>   
>   	if (!dp_panel || !mode_edid_bpp || !mode_pclk_khz) {
>   		DRM_ERROR("invalid input\n");
> 


-- 
With best wishes
Dmitry