mlx4_core: Add link type autosensing

When a port's link is down (except to driver restart) and the port is
configured for auto sensing, we try to sense port link type (Ethernet
or InfiniBand) in order to determine how to initialize the port.  If
the port type needs to be changed, all mlx4 for the device interfaces
are unregistered and then registered again with the new port
types.  Sensing is done with intervals of 3 seconds.

Signed-off-by: Yevgeny Petrilin <yevgenyp@mellanox.co.il>
Signed-off-by: Roland Dreier <rolandd@cisco.com>

drivers/net/mlx4/catas.c

@@ -42,7 +42,6 @@ enum {
 static DEFINE_SPINLOCK(catas_lock);
 
 static LIST_HEAD(catas_list);
-static struct workqueue_struct *catas_wq;
 static struct work_struct catas_work;
 
 static int internal_err_reset = 1;
@@ -77,7 +76,7 @@ static void poll_catas(unsigned long dev_ptr)
 			list_add(&priv->catas_err.list, &catas_list);
 			spin_unlock(&catas_lock);
 
-			queue_work(catas_wq, &catas_work);
+			queue_work(mlx4_wq, &catas_work);
 		}
 	} else
 		mod_timer(&priv->catas_err.timer,
@@ -146,18 +145,7 @@ void mlx4_stop_catas_poll(struct mlx4_dev *dev)
 	spin_unlock_irq(&catas_lock);
 }
 
-int __init mlx4_catas_init(void)
+void  __init mlx4_catas_init(void)
 {
 	INIT_WORK(&catas_work, catas_reset);
-
-	catas_wq = create_singlethread_workqueue("mlx4_err");
-	if (!catas_wq)
-		return -ENOMEM;
-
-	return 0;
-}
-
-void mlx4_catas_cleanup(void)
-{
-	destroy_workqueue(catas_wq);
 }