FAILED: patch "[PATCH] drm/amdgpu: only check for ECC on Vega10" failed to apply to 4.15-stable tree

[<gregkh@linuxfoundation.org>]

The patch below does not apply to the 4.15-stable tree.
If someone wants it applied there, or to any other stable or longterm
tree, then please email the backport, including the original git commit
id to <stable@vger.kernel.org>.

thanks,

greg k-h

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

>From 5ba4fa35d3d6a60fa5b669b319e2a95d5e0b6e7a Mon Sep 17 00:00:00 2001
From: Alex Deucher <alexander.deucher@amd.com>
Date: Wed, 17 Jan 2018 09:07:29 -0500
Subject: [PATCH] drm/amdgpu: only check for ECC on Vega10

RV doesn't support it.

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

diff --git a/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c b/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c
index eb8b1bb66389..2719937e09d6 100644
--- a/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c
@@ -634,14 +634,16 @@ static int gmc_v9_0_late_init(void *handle)
 	for(i = 0; i < AMDGPU_MAX_VMHUBS; ++i)
 		BUG_ON(vm_inv_eng[i] > 16);
 
-	r = gmc_v9_0_ecc_available(adev);
-	if (r == 1) {
-		DRM_INFO("ECC is active.\n");
-	} else if (r == 0) {
-		DRM_INFO("ECC is not present.\n");
-	} else {
-		DRM_ERROR("gmc_v9_0_ecc_available() failed. r: %d\n", r);
-		return r;
+	if (adev->asic_type == CHIP_VEGA10) {
+		r = gmc_v9_0_ecc_available(adev);
+		if (r == 1) {
+			DRM_INFO("ECC is active.\n");
+		} else if (r == 0) {
+			DRM_INFO("ECC is not present.\n");
+		} else {
+			DRM_ERROR("gmc_v9_0_ecc_available() failed. r: %d\n", r);
+			return r;
+		}
 	}
 
 	return amdgpu_irq_get(adev, &adev->mc.vm_fault, 0);