IB: Use printk_once() for driver versions

Replace open-coded reimplementations with printk_once().
Signed-off-by: Marcin Slusarz <marcin.slusarz@gmail.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>

drivers/infiniband/hw/cxgb3/iwch.c

@@ -105,11 +105,9 @@ static void rnic_init(struct iwch_dev *rnicp)
 static void open_rnic_dev(struct t3cdev *tdev)
 {
 	struct iwch_dev *rnicp;
-	static int vers_printed;
 
 	PDBG("%s t3cdev %p\n", __func__,  tdev);
-	if (!vers_printed++)
-		printk(KERN_INFO MOD "Chelsio T3 RDMA Driver - version %s\n",
+	printk_once(KERN_INFO MOD "Chelsio T3 RDMA Driver - version %s\n",
 		       DRV_VERSION);
 	rnicp = (struct iwch_dev *)ib_alloc_device(sizeof(*rnicp));
 	if (!rnicp) {

drivers/infiniband/hw/mlx4/main.c

@@ -540,15 +540,11 @@ static struct device_attribute *mlx4_class_attributes[] = {
 
 static void *mlx4_ib_add(struct mlx4_dev *dev)
 {
-	static int mlx4_ib_version_printed;
 	struct mlx4_ib_dev *ibdev;
 	int num_ports = 0;
 	int i;
 
-	if (!mlx4_ib_version_printed) {
-		printk(KERN_INFO "%s", mlx4_ib_version);
-		++mlx4_ib_version_printed;
-	}
+	printk_once(KERN_INFO "%s", mlx4_ib_version);
 
 	mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_IB)
 		num_ports++;

drivers/infiniband/hw/mthca/mthca_main.c

@@ -1215,15 +1215,11 @@ int __mthca_restart_one(struct pci_dev *pdev)
 static int __devinit mthca_init_one(struct pci_dev *pdev,
 				    const struct pci_device_id *id)
 {
-	static int mthca_version_printed = 0;
 	int ret;
 
 	mutex_lock(&mthca_device_mutex);
 
-	if (!mthca_version_printed) {
-		printk(KERN_INFO "%s", mthca_version);
-		++mthca_version_printed;
-	}
+	printk_once(KERN_INFO "%s", mthca_version);
 
 	if (id->driver_data >= ARRAY_SIZE(mthca_hca_table)) {
 		printk(KERN_ERR PFX "%s has invalid driver data %lx\n",