From: Christian König <christian.koenig@amd.com>
Date: Tue, 7 Oct 2025 08:10:52 +0000 (+0200)
Subject: drm/amdgpu: hide VRAM sysfs attributes on GPUs without VRAM
X-Git-Tag: v6.12.59~169
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=39a1c8c860e32d775f29917939e87b6a7c08ebb1;p=thirdparty%2Fkernel%2Fstable.git

drm/amdgpu: hide VRAM sysfs attributes on GPUs without VRAM

[ Upstream commit 33cc891b56b93cad1a83263eaf2e417436f70c82 ]

Otherwise accessing them can cause a crash.

Signed-off-by: Christian König <christian.koenig@amd.com>
Tested-by: Mangesh Gadre <Mangesh.Gadre@amd.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Arunpravin Paneer Selvam <Arunpravin.PaneerSelvam@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c
index ea4df412decff..54f2e7b392796 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c
@@ -234,6 +234,9 @@ static umode_t amdgpu_vram_attrs_is_visible(struct kobject *kobj,
 	    !adev->gmc.vram_vendor)
 		return 0;
 
+	if (!ttm_resource_manager_used(&adev->mman.vram_mgr.manager))
+		return 0;
+
 	return attr->mode;
 }