linux-kernel - [PATCH v3] drm/ttm: check the return value of kzalloc

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Date:   Tue,  2 Jan 2018 21:24:55 +0800
From:   Xiongwei Song <sxwjean@...il.com>
To:     christian.koenig@....com, Hongbo.He@....com, airlied@...ux.ie
Cc:     dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org
Subject: [PATCH v3] drm/ttm: check the return value of kzalloc

In the function ttm_page_alloc_init, kzalloc call is made for variable
_manager, we need to check its return value, it may return NULL.

Signed-off-by: Xiongwei Song <sxwjean@...il.com>
---
v2->v3: delete goto expression
v1->v2: delete kfree _manager
---
 drivers/gpu/drm/ttm/ttm_page_alloc.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/gpu/drm/ttm/ttm_page_alloc.c b/drivers/gpu/drm/ttm/ttm_page_alloc.c
index b5ba6441489f..5d252fb27a82 100644
--- a/drivers/gpu/drm/ttm/ttm_page_alloc.c
+++ b/drivers/gpu/drm/ttm/ttm_page_alloc.c
@@ -1007,6 +1007,8 @@ int ttm_page_alloc_init(struct ttm_mem_global *glob, unsigned max_pages)
 	pr_info("Initializing pool allocator\n");
 
 	_manager = kzalloc(sizeof(*_manager), GFP_KERNEL);
+	if (!_manager)
+		return -ENOMEM;
 
 	ttm_page_pool_init_locked(&_manager->wc_pool, GFP_HIGHUSER, "wc", 0);
 
-- 
2.15.1