dmaengine: use kmem_cache_zalloc instead of kmem_cache_alloc/memset

Using kmem_cache_zalloc() instead of kmem_cache_alloc() and memset().

spatch with a semantic match is used to found this problem.
(http://coccinelle.lip6.fr/)

Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>

diff --git a/drivers/dma/ioat/dma_v2.c b/drivers/dma/ioat/dma_v2.c
index 86895760b598ef61ca63ebce58f3c1f2e5093cbf..b9d66785144511ff294cb59096d6de1b766cbece 100644 (file)
--- a/drivers/dma/ioat/dma_v2.c
+++ b/drivers/dma/ioat/dma_v2.c
@@ -434,12 +434,11 @@ static struct ioat_ring_ent *ioat2_alloc_ring_ent(struct dma_chan *chan, gfp_t f
                return NULL;
        memset(hw, 0, sizeof(*hw));
 
-       desc = kmem_cache_alloc(ioat2_cache, flags);
+       desc = kmem_cache_zalloc(ioat2_cache, flags);
        if (!desc) {
                pci_pool_free(dma->dma_pool, hw, phys);
                return NULL;
        }
-       memset(desc, 0, sizeof(*desc));
 
        dma_async_tx_descriptor_init(&desc->txd, chan);
        desc->txd.tx_submit = ioat2_tx_submit_unlock;