linux-kernel - Re: [PATCH][next] drm/vmwgfx: remove redundant assignment to sub

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Message-ID: <4fbbedfdb26eee7f21d8d681ce9d56a881f41c92.camel@vmware.com>
Date:   Mon, 1 Jul 2019 21:13:30 +0000
From:   Deepak Singh Rawat <drawat@...are.com>
To:     Colin King <colin.king@...onical.com>,
        Linux-graphics-maintainer <Linux-graphics-maintainer@...are.com>,
        Thomas Hellstrom <thellstrom@...are.com>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>,
        "dri-devel@...ts.freedesktop.org" <dri-devel@...ts.freedesktop.org>
CC:     "kernel-janitors@...r.kernel.org" <kernel-janitors@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH][next] drm/vmwgfx: remove redundant assignment to sub_res

Hi Colin,

Reviewed-by: Deepak Rawat <drawat@...are.com>

Thanks,
Deepak


On Mon, 2019-06-24 at 23:44 +0100, Colin King wrote:
> From: Colin Ian King <colin.king@...onical.com>
> 
> Variable sub_res is initialized to a value that is never read and it
> is re-assigned later in a for-loop.  The initialization is redundant
> and can be removed.
> 
> Addresses-Coverity: ("Unused value")
> Signed-off-by: Colin Ian King <colin.king@...onical.com>
> ---
>  drivers/gpu/drm/vmwgfx/vmwgfx_surface.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_surface.c
> b/drivers/gpu/drm/vmwgfx/vmwgfx_surface.c
> index 862ca44680ca..3257ba689d93 100644
> --- a/drivers/gpu/drm/vmwgfx/vmwgfx_surface.c
> +++ b/drivers/gpu/drm/vmwgfx/vmwgfx_surface.c
> @@ -1914,7 +1914,7 @@ static void
> vmw_surface_tex_dirty_range_add(struct vmw_resource *res,
>  	} else {
>  		/* Dirty range covers multiple sub-resources */
>  		struct svga3dsurface_loc loc_min, loc_max;
> -		u32 sub_res = loc1.sub_resource;
> +		u32 sub_res;
>  
>  		svga3dsurface_max_loc(cache, loc1.sub_resource,
> &loc_max);
>  		vmw_subres_dirty_add(dirty, &loc1, &loc_max);