Calculate the correct value for max_entries or we might run after the
page_address array.

v2: Xinhui pointed out we don't need the shift

Signed-off-by: Christian König <christian.koe...@amd.com>
Fixes: 1e691e244487 drm/amdgpu: stop allocating dummy GTT nodes
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c 
b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
index 8bc2253939be..be886bdca5c6 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
@@ -1697,7 +1697,7 @@ static int amdgpu_vm_bo_split_mapping(struct 
amdgpu_device *adev,
                                AMDGPU_GPU_PAGES_IN_CPU_PAGE;
                } else {
                        addr = 0;
-                       max_entries = S64_MAX;
+                       max_entries = mapping->last - mapping->start + 1;
                }
 
                if (pages_addr) {
-- 
2.17.1

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