linux-kernel - [PATCH 5.18 121/141] drm/amdgpu: Fix GTT size reporting in amdgpu

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Date:   Mon, 20 Jun 2022 14:50:59 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Martin Roukala <martin.roukala@...uf.org>,
        Mike Lothian <mike@...eburn.co.uk>,
        Christian König <christian.koenig@....com>,
        Michel Dänzer <mdaenzer@...hat.com>,
        Alex Deucher <alexander.deucher@....com>
Subject: [PATCH 5.18 121/141] drm/amdgpu: Fix GTT size reporting in amdgpu_ioctl

From: Michel Dänzer <mdaenzer@...hat.com>

commit c904e3acbab3fd97649cd4ab1ff7f1521ad3a255 upstream.

The commit below changed the TTM manager size unit from pages to
bytes, but failed to adjust the corresponding calculations in
amdgpu_ioctl.

Fixes: dfa714b88eb0 ("drm/amdgpu: remove GTT accounting v2")
Bug: https://gitlab.freedesktop.org/drm/amd/-/issues/1930
Bug: https://gitlab.freedesktop.org/mesa/mesa/-/issues/6642
Tested-by: Martin Roukala <martin.roukala@...uf.org>
Tested-by: Mike Lothian <mike@...eburn.co.uk>
Reviewed-by: Christian König <christian.koenig@....com>
Signed-off-by: Michel Dänzer <mdaenzer@...hat.com>
Signed-off-by: Alex Deucher <alexander.deucher@....com>
Cc: stable@...r.kernel.org # 5.18.x
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c |    2 --
 1 file changed, 2 deletions(-)

--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
@@ -634,7 +634,6 @@ int amdgpu_info_ioctl(struct drm_device
 			    atomic64_read(&adev->visible_pin_size),
 			    vram_gtt.vram_size);
 		vram_gtt.gtt_size = ttm_manager_type(&adev->mman.bdev, TTM_PL_TT)->size;
-		vram_gtt.gtt_size *= PAGE_SIZE;
 		vram_gtt.gtt_size -= atomic64_read(&adev->gart_pin_size);
 		return copy_to_user(out, &vram_gtt,
 				    min((size_t)size, sizeof(vram_gtt))) ? -EFAULT : 0;
@@ -667,7 +666,6 @@ int amdgpu_info_ioctl(struct drm_device
 			mem.cpu_accessible_vram.usable_heap_size * 3 / 4;
 
 		mem.gtt.total_heap_size = gtt_man->size;
-		mem.gtt.total_heap_size *= PAGE_SIZE;
 		mem.gtt.usable_heap_size = mem.gtt.total_heap_size -
 			atomic64_read(&adev->gart_pin_size);
 		mem.gtt.heap_usage = ttm_resource_manager_usage(gtt_man);