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drm/amdgpu: amdgpu_vram_mgr_new(): Clamp lpfn to total vram

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commit 4d2f6b4e4c7ed32e7fa39fcea37344a9eab99094 upstream.

The drm_mm allocator tolerated being passed end > mm->size, but the
drm_buddy allocator does not.

Restore the pre-buddy-allocator behavior of allowing such placements.

Closes: https://gitlab.freedesktop.org/drm/amd/-/issues/3448
Signed-off-by: John Olender <john.olender@gmail.com>
Reviewed-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>
Cc: stable@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
John Olender
2025-04-29 07:24:28 -04:00
committed by Greg Kroah-Hartman
parent 5148c7ea69
commit a8ceffaeb7
1 changed files with 1 additions and 1 deletions
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2
drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c
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@@ -435,7 +435,7 @@ static int amdgpu_vram_mgr_new(struct ttm_resource_manager *man,
int r;
lpfn = (u64)place->lpfn << PAGE_SHIFT;
if (!lpfn)
if (!lpfn || lpfn > man->size)
lpfn = man->size;
fpfn = (u64)place->fpfn << PAGE_SHIFT;