WTF: patch "[PATCH] drm/amdgpu: update rev id for hainan" was seriously submitted to be applied to the 4.9-stable tree?

[<gregkh@linuxfoundation.org>]

The patch below was submitted to be applied to the 4.9-stable tree.

I fail to see how this patch meets the stable kernel rules as found at
Documentation/stable_kernel_rules.txt.

I could be totally wrong, and if so, please respond to 
<stable@vger.kernel.org> and let me know why this patch should be
applied.  Otherwise, it is now dropped from my patch queues, never to be
seen again.

thanks,

greg k-h

------------------ original commit in Linus's tree ------------------

>From 05319478dad476841282a0eab66a00da425e0914 Mon Sep 17 00:00:00 2001
From: Flora Cui <Flora.Cui@amd.com>
Date: Thu, 15 Dec 2016 14:58:28 +0800
Subject: [PATCH] drm/amdgpu: update rev id for hainan

Signed-off-by: Flora Cui <Flora.Cui@amd.com>
Reviewed-by: Junwei Zhang <Jerry.Zhang@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org

diff --git a/drivers/gpu/drm/amd/amdgpu/si.c b/drivers/gpu/drm/amd/amdgpu/si.c
index 49e0fee28053..232ee8909d38 100644
--- a/drivers/gpu/drm/amd/amdgpu/si.c
+++ b/drivers/gpu/drm/amd/amdgpu/si.c
@@ -1279,6 +1279,7 @@ static int si_common_early_init(void *handle)
 			AMD_CG_SUPPORT_HDP_LS |
 			AMD_CG_SUPPORT_HDP_MGCG;
 		adev->pg_flags = 0;
+		adev->external_rev_id = 70;
 		break;
 
 	default: