RDMA: Use vzalloc() to replace vmalloc()+memset(0)

Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>

drivers/infiniband/ulp/ipoib/ipoib_main.c

@@ -916,13 +916,12 @@ int ipoib_dev_init(struct net_device *dev, struct ib_device *ca, int port)
 		goto out;
 	}
 
-	priv->tx_ring = vmalloc(ipoib_sendq_size * sizeof *priv->tx_ring);
+	priv->tx_ring = vzalloc(ipoib_sendq_size * sizeof *priv->tx_ring);
 	if (!priv->tx_ring) {
 		printk(KERN_WARNING "%s: failed to allocate TX ring (%d entries)\n",
 		       ca->name, ipoib_sendq_size);
 		goto out_rx_ring_cleanup;
 	}
-	memset(priv->tx_ring, 0, ipoib_sendq_size * sizeof *priv->tx_ring);
 
 	/* priv->tx_head, tx_tail & tx_outstanding are already 0 */