Make sure the cur->size doesn't exceed cur->remaining. Otherwise the
first call to amdgpu_res_next will trigger the BUG_ON in that function.
Fixes: 3af0a018a728 ("drm/amdgpu: new resource cursor")
CC: Christian König <christian.koe...@amd.com>
Signed-off-by: Felix Kuehling <felix.kuehl...@amd.com>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_res_cursor.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_res_cursor.h
b/drivers/gpu/drm/amd/amdgpu/amdgpu_res_cursor.h
index 1335e098510f..b49a61d07d60 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_res_cursor.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_res_cursor.h
@@ -68,7 +68,7 @@ static inline void amdgpu_res_first(struct ttm_resource *res,
start -= node++->size << PAGE_SHIFT;
cur->start = (node->start << PAGE_SHIFT) + start;
- cur->size = (node->size << PAGE_SHIFT) - start;
+ cur->size = min((node->size << PAGE_SHIFT) - start, size);
cur->remaining = size;
cur->node = node;
}
--
2.30.2
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