IB/rxe: Reuse code which sets port state

Same code is executed in both rxe_param_set_add and rxe_notify functions.
Make one function and call it from both places.

Since both callers already have a rxe object use it directly instead of
deriving it from the net device.

Signed-off-by: Yuval Shaia <yuval.shaia@oracle.com>
Reviewed-by: Steve Wise <swise@opengridcomputing.com> 
Reviewed-by: Bart Van Assche <bart.vanassche@wdc.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>

Author: Yuval Shaia

drivers/infiniband/sw/rxe/rxe.h

@@ -110,5 +110,6 @@ struct rxe_dev *get_rxe_by_name(const char *name);
 
 void rxe_port_up(struct rxe_dev *rxe);
 void rxe_port_down(struct rxe_dev *rxe);
+void rxe_set_port_state(struct rxe_dev *rxe);
 
 #endif /* RXE_H */

drivers/infiniband/sw/rxe/rxe_net.c

@@ -625,6 +625,14 @@ void rxe_port_down(struct rxe_dev *rxe)
 	dev_info(&rxe->ib_dev.dev, "set down\n");
 }
 
+void rxe_set_port_state(struct rxe_dev *rxe)
+{
+	if (netif_running(rxe->ndev) && netif_carrier_ok(rxe->ndev))
+		rxe_port_up(rxe);
+	else
+		rxe_port_down(rxe);
+}
+
 static int rxe_notify(struct notifier_block *not_blk,
 		      unsigned long event,
 		      void *arg)
@@ -651,10 +659,7 @@ static int rxe_notify(struct notifier_block *not_blk,
 		rxe_set_mtu(rxe, ndev->mtu);
 		break;
 	case NETDEV_CHANGE:
-		if (netif_running(ndev) && netif_carrier_ok(ndev))
-			rxe_port_up(rxe);
-		else
-			rxe_port_down(rxe);
+		rxe_set_port_state(rxe);
 		break;
 	case NETDEV_REBOOT:
 	case NETDEV_GOING_DOWN:

drivers/infiniband/sw/rxe/rxe_sysfs.c

@@ -53,22 +53,6 @@ static int sanitize_arg(const char *val, char *intf, int intf_len)
 	return len;
 }
 
-static void rxe_set_port_state(struct net_device *ndev)
-{
-	struct rxe_dev *rxe = net_to_rxe(ndev);
-	bool is_up = netif_running(ndev) && netif_carrier_ok(ndev);
-
-	if (!rxe)
-		goto out;
-
-	if (is_up)
-		rxe_port_up(rxe);
-	else
-		rxe_port_down(rxe); /* down for unknown state */
-out:
-	return;
-}
-
 static int rxe_param_set_add(const char *val, const struct kernel_param *kp)
 {
 	int len;
@@ -104,7 +88,7 @@ static int rxe_param_set_add(const char *val, const struct kernel_param *kp)
 		goto err;
 	}
 
-	rxe_set_port_state(ndev);
+	rxe_set_port_state(rxe);
 	dev_info(&rxe->ib_dev.dev, "added %s\n", intf);
 err:
 	if (ndev)