linux-kernel - Re: [PATCH] drm/msm: remove unneeded variable ret

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Date:   Wed, 26 May 2021 03:55:00 +0300
From:   Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
To:     Bernard Zhao <bernard@...o.com>, Rob Clark <robdclark@...il.com>,
        Sean Paul <sean@...rly.run>, David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>,
        Kuogee Hsieh <khsieh@...eaurora.org>,
        Stephen Boyd <swboyd@...omium.org>,
        Abhinav Kumar <abhinavk@...eaurora.org>,
        Tanmay Shah <tanmay@...eaurora.org>,
        Chandan Uddaraju <chandanu@...eaurora.org>,
        linux-arm-msm@...r.kernel.org, dri-devel@...ts.freedesktop.org,
        freedreno@...ts.freedesktop.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] drm/msm: remove unneeded variable ret

On 07/04/2021 16:06, Bernard Zhao wrote:
> This patch fix coccicheck warning:
> drivers/gpu/drm/msm/dp/dp_link.c:848:5-8: Unneeded variable: "ret". Return "0" on line 880
> Also remove unneeded function return value check.
> 
> Signed-off-by: Bernard Zhao <bernard@...o.com>

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


> ---
>   drivers/gpu/drm/msm/dp/dp_link.c | 15 +++------------
>   1 file changed, 3 insertions(+), 12 deletions(-)
> 
> diff --git a/drivers/gpu/drm/msm/dp/dp_link.c b/drivers/gpu/drm/msm/dp/dp_link.c
> index be986da78c4a..3395b08155a6 100644
> --- a/drivers/gpu/drm/msm/dp/dp_link.c
> +++ b/drivers/gpu/drm/msm/dp/dp_link.c
> @@ -843,10 +843,8 @@ bool dp_link_send_edid_checksum(struct dp_link *dp_link, u8 checksum)
>   	return ret == 1;
>   }
>   
> -static int dp_link_parse_vx_px(struct dp_link_private *link)
> +static void dp_link_parse_vx_px(struct dp_link_private *link)
>   {
> -	int ret = 0;
> -
>   	DRM_DEBUG_DP("vx: 0=%d, 1=%d, 2=%d, 3=%d\n",
>   		drm_dp_get_adjust_request_voltage(link->link_status, 0),
>   		drm_dp_get_adjust_request_voltage(link->link_status, 1),
> @@ -876,8 +874,6 @@ static int dp_link_parse_vx_px(struct dp_link_private *link)
>   	DRM_DEBUG_DP("Requested: v_level = 0x%x, p_level = 0x%x\n",
>   			link->dp_link.phy_params.v_level,
>   			link->dp_link.phy_params.p_level);
> -
> -	return ret;
>   }
>   
>   /**
> @@ -891,8 +887,6 @@ static int dp_link_parse_vx_px(struct dp_link_private *link)
>   static int dp_link_process_phy_test_pattern_request(
>   		struct dp_link_private *link)
>   {
> -	int ret = 0;
> -
>   	if (!(link->request.test_requested & DP_TEST_LINK_PHY_TEST_PATTERN)) {
>   		DRM_DEBUG_DP("no phy test\n");
>   		return -EINVAL;
> @@ -918,12 +912,9 @@ static int dp_link_process_phy_test_pattern_request(
>   	link->dp_link.link_params.rate =
>   		drm_dp_bw_code_to_link_rate(link->request.test_link_rate);
>   
> -	ret = dp_link_parse_vx_px(link);
> -
> -	if (ret)
> -		DRM_ERROR("parse_vx_px failed. ret=%d\n", ret);
> +	dp_link_parse_vx_px(link);
>   
> -	return ret;
> +	return 0;
>   }
>   
>   static u8 get_link_status(const u8 link_status[DP_LINK_STATUS_SIZE], int r)
> 


-- 
With best wishes
Dmitry