linux-kernel - Re: [PATCH] drm/amd/display: remove redundant null check of array 'data'

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Message-ID: <034400d8-22ec-f5fe-a958-6c61e487784a@amd.com>
Date:   Fri, 15 Dec 2017 13:18:45 +0100
From:   Christian König <christian.koenig@....com>
To:     Colin King <colin.king@...onical.com>,
        David Airlie <airlied@...ux.ie>,
        Harry Wentland <harry.wentland@....com>,
        amd-gfx@...ts.freedesktop.org, dri-devel@...ts.freedesktop.org
Cc:     kernel-janitors@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] drm/amd/display: remove redundant null check of array
 'data'

Am 15.12.2017 um 11:53 schrieb Colin King:
> From: Colin Ian King <colin.king@...onical.com>
>
> The null check on aconnector->base.edid_blob_ptr->data is redundant
> since data is an array and can never be null.  Remove it.
>
> Detected by CoverityScan, CID#1460369 ("Array compared against 0")
>
> Signed-off-by: Colin Ian King <colin.king@...onical.com>

Acked-by: Christian König <christian.koenig@....com>

> ---
>   drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 3 +--
>   1 file changed, 1 insertion(+), 2 deletions(-)
>
> diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
> index ccbf10e3bbb6..c388778dbba3 100644
> --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
> +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
> @@ -2725,8 +2725,7 @@ static void create_eml_sink(struct amdgpu_dm_connector *aconnector)
>   	};
>   	struct edid *edid;
>   
> -	if (!aconnector->base.edid_blob_ptr ||
> -		!aconnector->base.edid_blob_ptr->data) {
> +	if (!aconnector->base.edid_blob_ptr) {
>   		DRM_ERROR("No EDID firmware found on connector: %s ,forcing to OFF!\n",
>   				aconnector->base.name);
>