[PATCH 2/2] drm/amdkfd: Fix resource cursor initialization

[Felix Kuehling]

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.koenig at amd.com>
Signed-off-by: Felix Kuehling <Felix.Kuehling at 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