drm/amdgpu: fix overflow on 32bit systems

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>
Cc: stable@vger.kernel.org

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
index f68b7cd..b68dcb9 100644 (file)
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
@@ -855,7 +855,7 @@ 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 {