From: Markus Elfring <elfring@xxxxxxxxxxxxxxxxxxxxx>
Date: Thu, 22 Sep 2016 14:48:39 +0200
* Multiplications for the size determination of memory allocations
indicated that array data structure should be processed.
Thus use the corresponding function "kmalloc_array".
This issue was detected by using the Coccinelle software.
* Replace the specification of data types by pointer dereferences
to make the corresponding size determination a bit safer according to
the Linux coding style convention.
Signed-off-by: Markus Elfring <elfring@xxxxxxxxxxxxxxxxxxxxx>
---
drivers/gpu/drm/ttm/ttm_page_alloc_dma.c | 10 ++++++----
1 file changed, 6 insertions(+), 4 deletions(-)
diff --git a/drivers/gpu/drm/ttm/ttm_page_alloc_dma.c b/drivers/gpu/drm/ttm/ttm_page_alloc_dma.c
index bef9f6f..194818d 100644
--- a/drivers/gpu/drm/ttm/ttm_page_alloc_dma.c
+++ b/drivers/gpu/drm/ttm/ttm_page_alloc_dma.c
@@ -439,8 +439,9 @@ static unsigned ttm_dma_page_pool_free(struct dma_pool *pool, unsigned nr_free,
if (use_static)
pages_to_free = static_buf;
else
- pages_to_free = kmalloc(npages_to_free * sizeof(struct page *),
- GFP_KERNEL);
+ pages_to_free = kmalloc_array(npages_to_free,
+ sizeof(*pages_to_free),
+ GFP_KERNEL);
if (!pages_to_free) {
pr_err("%s: Failed to allocate memory for pool free operation\n",
@@ -726,8 +727,9 @@ static int ttm_dma_pool_alloc_new_pages(struct dma_pool *pool,
(unsigned)(PAGE_SIZE/sizeof(struct page *)));
/* allocate array for page caching change */
- caching_array = kmalloc(max_cpages*sizeof(struct page *), GFP_KERNEL);
-
+ caching_array = kmalloc_array(max_cpages,
+ sizeof(*caching_array),
+ GFP_KERNEL);
if (!caching_array) {
pr_err("%s: Unable to allocate table for new pages\n",
pool->dev_name);
--
2.10.0
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