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drm: radeon: fix overflow on 32bit systems 

the type mem->start is unsigned long, so this can overflow on
32bit system, since the type addr is uint64_t.

Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Young Xiao <YangX92@hotmail.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Young Xiao 2018-11-27 11:50:17 +00:00 committed by Alex Deucher
parent ce99814973
commit b3f4bdda99
1 changed files with 1 additions and 1 deletions
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2
drivers/gpu/drm/radeon/radeon_vm.c
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@ -946,7 +946,7 @@ int radeon_vm_bo_update(struct radeon_device *rdev,
bo_va->flags &= ~RADEON_VM_PAGE_WRITEABLE;
if (mem) {
addr = mem->start << PAGE_SHIFT;
addr = (u64)mem->start << PAGE_SHIFT;
if (mem->mem_type != TTM_PL_SYSTEM) {
bo_va->flags |= RADEON_VM_PAGE_VALID;
}