net: ethernet: sun: Convert timers to use timer_setup()

In preparation for unconditionally passing the struct timer_list pointer to
all timer callbacks, switch to using the new timer_setup() and from_timer()
to pass the timer pointer explicitly.

Cc: "David S. Miller" <davem@davemloft.net>
Cc: Philippe Reynes <tremyfr@gmail.com>
Cc: Jarod Wilson <jarod@redhat.com>
Cc: Shannon Nelson <shannon.nelson@oracle.com>
Cc: Rob Herring <robh@kernel.org>
Cc: chris hyser <chris.hyser@oracle.com>
Cc: Tushar Dave <tushar.n.dave@oracle.com>
Cc: Tobias Klauser <tklauser@distanz.ch>
Cc: netdev@vger.kernel.org
Signed-off-by: Kees Cook <keescook@chromium.org>
Acked-by: Shannon Nelson <shannon.nelson@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/ethernet/sun/sungem.c b/drivers/net/ethernet/sun/sungem.c
index b75ab8f..a7afcee 100644
--- a/drivers/net/ethernet/sun/sungem.c
+++ b/drivers/net/ethernet/sun/sungem.c
@@ -1496,9 +1496,9 @@ static int gem_mdio_link_not_up(struct gem *gp)
 	}
 }
 
-static void gem_link_timer(unsigned long data)
+static void gem_link_timer(struct timer_list *t)
 {
-	struct gem *gp = (struct gem *) data;
+	struct gem *gp = from_timer(gp, t, link_timer);
 	struct net_device *dev = gp->dev;
 	int restart_aneg = 0;
 
@@ -2910,7 +2910,7 @@ static int gem_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
 
 	gp->msg_enable = DEFAULT_MSG;
 
-	setup_timer(&gp->link_timer, gem_link_timer, (unsigned long)gp);
+	timer_setup(&gp->link_timer, gem_link_timer, 0);
 
 	INIT_WORK(&gp->reset_task, gem_reset_task);