ibmveth: consolidate kmalloc of array, memset 0 to kcalloc

This is an API consolidation only. The use of kmalloc + memset to 0
is equivalent to kcalloc in this case as it is allocating an array
of elements.
Signed-off-by: Nicholas Mc Guire <hofrat@osadl.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/ibm/ibmveth.c

@@ -169,7 +169,7 @@ static int ibmveth_alloc_buffer_pool(struct ibmveth_buff_pool *pool)
 	if (!pool->free_map)
 		return -1;
 
-	pool->dma_addr = kmalloc(sizeof(dma_addr_t) * pool->size, GFP_KERNEL);
+	pool->dma_addr = kcalloc(pool->size, sizeof(dma_addr_t), GFP_KERNEL);
 	if (!pool->dma_addr) {
 		kfree(pool->free_map);
 		pool->free_map = NULL;
@@ -187,8 +187,6 @@ static int ibmveth_alloc_buffer_pool(struct ibmveth_buff_pool *pool)
 		return -1;
 	}
 
-	memset(pool->dma_addr, 0, sizeof(dma_addr_t) * pool->size);
-
 	for (i = 0; i < pool->size; ++i)
 		pool->free_map[i] = i;