linux-kernel - Re: [PATCH][next] drm/rockchip: lvds: ensure ret is assigned before checking for an error

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Date:   Mon, 3 Aug 2020 08:46:45 +0200
From:   Miquel Raynal <miquel.raynal@...tlin.com>
To:     Colin King <colin.king@...onical.com>
Cc:     Sandy Huang <hjc@...k-chips.com>,
        Heiko Stübner <heiko@...ech.de>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>,
        dri-devel@...ts.freedesktop.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-rockchip@...ts.infradead.org,
        kernel-janitors@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH][next] drm/rockchip: lvds: ensure ret is assigned before
 checking for an error

Hello,

Colin King <colin.king@...onical.com> wrote on Tue, 14 Jul 2020
20:00:03 +0100:

> From: Colin Ian King <colin.king@...onical.com>
> 
> Currently there are two places where the return status in ret is being
> checked for an error however the assignment of ret has been omitted
> making the checks redundant.  Fix this by adding in the missing assignments
> of ret.
> 
> Addresses-Coverity: ("Logically dead code")
> Fixes: cca1705c3d89 ("drm/rockchip: lvds: Add PX30 support")
> Signed-off-by: Colin Ian King <colin.king@...onical.com>
> ---
>  drivers/gpu/drm/rockchip/rockchip_lvds.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/gpu/drm/rockchip/rockchip_lvds.c b/drivers/gpu/drm/rockchip/rockchip_lvds.c
> index 63f967902c2d..b45c618b9793 100644
> --- a/drivers/gpu/drm/rockchip/rockchip_lvds.c
> +++ b/drivers/gpu/drm/rockchip/rockchip_lvds.c
> @@ -499,11 +499,11 @@ static int px30_lvds_probe(struct platform_device *pdev,
>  	if (IS_ERR(lvds->dphy))
>  		return PTR_ERR(lvds->dphy);
>  
> -	phy_init(lvds->dphy);
> +	ret = phy_init(lvds->dphy);
>  	if (ret)
>  		return ret;
>  
> -	phy_set_mode(lvds->dphy, PHY_MODE_LVDS);
> +	ret = phy_set_mode(lvds->dphy, PHY_MODE_LVDS);
>  	if (ret)
>  		return ret;
>  

I thought I (or Heiko) already sent a patch for that but apparently
not...

Reviewed-by: Miquel Raynal <miquel.raynal@...tlin.com>

Thanks,
Miquèl