drm/amdgpu: fix overflow on 32bit systems

commit b7d698d7fd7d132c6ebe56d230584f2cae6c94ee upstream.

mem->start is a long, so this can overflow on 32bit systems.

Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Jammy Zhou <Jammy.Zhou@amd.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
index 9a4e3b63f1cb4bf7ca9c73e813a0568f320c6574..b07402fc8ded98d31eb60070a7a17ceda0c21d07 100644 (file)
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
@@ -787,7 +787,7 @@ int amdgpu_vm_bo_update(struct amdgpu_device *adev,
        int r;
 
        if (mem) {
-               addr = mem->start << PAGE_SHIFT;
+               addr = (u64)mem->start << PAGE_SHIFT;
                if (mem->mem_type != TTM_PL_TT)
                        addr += adev->vm_manager.vram_base_offset;
        } else {