ethernet/intel: 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. Switches test of .data field to
.function, since .data will be going away.

Cc: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Cc: intel-wired-lan@lists.osuosl.org
Cc: netdev@vger.kernel.org
Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/ethernet/intel/i40e/i40e_main.c b/drivers/net/ethernet/intel/i40e/i40e_main.c
index bb31d53..3998914 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_main.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_main.c
@@ -8800,9 +8800,9 @@ static void i40e_service_task(struct work_struct *work)
  * i40e_service_timer - timer callback
  * @data: pointer to PF struct
  **/
-static void i40e_service_timer(unsigned long data)
+static void i40e_service_timer(struct timer_list *t)
 {
-	struct i40e_pf *pf = (struct i40e_pf *)data;
+	struct i40e_pf *pf = from_timer(pf, t, service_timer);
 
 	mod_timer(&pf->service_timer,
 		  round_jiffies(jiffies + pf->service_timer_period));
@@ -12648,7 +12648,7 @@ static int i40e_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 #endif /* CONFIG_I40E_DCB */
 
 	/* set up periodic task facility */
-	setup_timer(&pf->service_timer, i40e_service_timer, (unsigned long)pf);
+	timer_setup(&pf->service_timer, i40e_service_timer, 0);
 	pf->service_timer_period = HZ;
 
 	INIT_WORK(&pf->service_task, i40e_service_task);
@@ -12972,7 +12972,7 @@ static void i40e_remove(struct pci_dev *pdev)
 	/* no more scheduling of any task */
 	set_bit(__I40E_SUSPENDED, pf->state);
 	set_bit(__I40E_DOWN, pf->state);
-	if (pf->service_timer.data)
+	if (pf->service_timer.function)
 		del_timer_sync(&pf->service_timer);
 	if (pf->service_task.func)
 		cancel_work_sync(&pf->service_task);