diff options
| author | Gustavo A. R. Silva <gustavo@embeddedor.com> | 2019-01-09 08:44:37 -0600 |
|---|---|---|
| committer | Vinod Koul <vkoul@kernel.org> | 2019-01-20 10:51:38 +0530 |
| commit | 48b02a85fe2e6a0927acaa754ba3bef4a20a5e37 (patch) | |
| tree | 3c0461df6c7d61a081a7c346e996faacac91d8a9 /drivers/dma | |
| parent | 3c215fd868dd9fe077af63dbddca585e5116f598 (diff) | |
dmaengine: axi-dmac: Use struct_size() in kzalloc()
One of the more common cases of allocation size calculations is finding the
size of a structure that has a zero-sized array at the end, along with memory
for some number of elements for that array. For example:
struct foo {
int stuff;
void *entry[];
};
instance = kzalloc(sizeof(struct foo) + sizeof(void *) * count, GFP_KERNEL);
Instead of leaving these open-coded and prone to type mistakes, we can now
use the new struct_size() helper:
instance = kzalloc(struct_size(instance, entry, count), GFP_KERNEL);
This code was detected with the help of Coccinelle.
Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Diffstat (limited to 'drivers/dma')
| -rw-r--r-- | drivers/dma/dma-axi-dmac.c | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/drivers/dma/dma-axi-dmac.c b/drivers/dma/dma-axi-dmac.c index 15b2453d2647..ffc0adc2f6ce 100644 --- a/drivers/dma/dma-axi-dmac.c +++ b/drivers/dma/dma-axi-dmac.c @@ -367,8 +367,7 @@ static struct axi_dmac_desc *axi_dmac_alloc_desc(unsigned int num_sgs) struct axi_dmac_desc *desc; unsigned int i; - desc = kzalloc(sizeof(struct axi_dmac_desc) + - sizeof(struct axi_dmac_sg) * num_sgs, GFP_NOWAIT); + desc = kzalloc(struct_size(desc, sg, num_sgs), GFP_NOWAIT); if (!desc) return NULL; |