[PATCH] drm/amdgpu: Use kvmalloc_array for allocating VRAM manager nodes array

[Michel Dänzer]

From: Michel Dänzer <michel.daenzer at amd.com>

It can be quite big, and there's no need for it to be physically
contiguous. This is less likely to fail under memory pressure (has
actually happened while running piglit).

Cc: stable at vger.kernel.org
Signed-off-by: Michel Dänzer <michel.daenzer at amd.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c
index 9aca653bec07..9c47e860e5e6 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c
@@ -135,7 +135,8 @@ static int amdgpu_vram_mgr_new(struct ttm_mem_type_manager *man,
 		num_nodes = DIV_ROUND_UP(mem->num_pages, pages_per_node);
 	}
 
-	nodes = kcalloc(num_nodes, sizeof(*nodes), GFP_KERNEL);
+	nodes = kvmalloc_array(num_nodes, sizeof(*nodes),
+			       GFP_KERNEL | __GFP_ZERO);
 	if (!nodes)
 		return -ENOMEM;
 
@@ -190,7 +191,7 @@ static int amdgpu_vram_mgr_new(struct ttm_mem_type_manager *man,
 		drm_mm_remove_node(&nodes[i]);
 	spin_unlock(&mgr->lock);
 
-	kfree(nodes);
+	kvfree(nodes);
 	return r == -ENOSPC ? 0 : r;
 }
 
@@ -229,7 +230,7 @@ static void amdgpu_vram_mgr_del(struct ttm_mem_type_manager *man,
 	atomic64_sub(usage, &mgr->usage);
 	atomic64_sub(vis_usage, &mgr->vis_usage);
 
-	kfree(mem->mm_node);
+	kvfree(mem->mm_node);
 	mem->mm_node = NULL;
 }
 
-- 
2.17.1