[PATCH] e1000e: makes e1000_watchdog_task use queue_delayed_work

[Dmitrii Ermakov <demonihin@gmail.com>]

Replaces watchdog timer with delayed_work as advised
in the driver's TODO comment.

Signed-off-by: Dmitrii Ermakov <demonihin@gmail.com>
---
 drivers/net/ethernet/intel/e1000e/e1000.h  |  4 +-
 drivers/net/ethernet/intel/e1000e/netdev.c | 43 ++++++++--------------
 2 files changed, 18 insertions(+), 29 deletions(-)

diff --git a/drivers/net/ethernet/intel/e1000e/e1000.h b/drivers/net/ethernet/intel/e1000e/e1000.h
index ba9c19e6994c..5a60372d2158 100644
--- a/drivers/net/ethernet/intel/e1000e/e1000.h
+++ b/drivers/net/ethernet/intel/e1000e/e1000.h
@@ -189,12 +189,12 @@ struct e1000_phy_regs {
 
 /* board specific private data structure */
 struct e1000_adapter {
-	struct timer_list watchdog_timer;
 	struct timer_list phy_info_timer;
 	struct timer_list blink_timer;
 
+	struct delayed_work watchdog_work;
+
 	struct work_struct reset_task;
-	struct work_struct watchdog_task;
 
 	const struct e1000_info *ei;
 
diff --git a/drivers/net/ethernet/intel/e1000e/netdev.c b/drivers/net/ethernet/intel/e1000e/netdev.c
index 360ee26557f7..5b7a3a1423ed 100644
--- a/drivers/net/ethernet/intel/e1000e/netdev.c
+++ b/drivers/net/ethernet/intel/e1000e/netdev.c
@@ -1778,7 +1778,8 @@ static irqreturn_t e1000_intr_msi(int __always_unused irq, void *data)
 		}
 		/* guard against interrupt when we're going down */
 		if (!test_bit(__E1000_DOWN, &adapter->state))
-			mod_timer(&adapter->watchdog_timer, jiffies + 1);
+			queue_delayed_work(system_wq, &adapter->watchdog_work,
+					   1);
 	}
 
 	/* Reset on uncorrectable ECC error */
@@ -1857,7 +1858,8 @@ static irqreturn_t e1000_intr(int __always_unused irq, void *data)
 		}
 		/* guard against interrupt when we're going down */
 		if (!test_bit(__E1000_DOWN, &adapter->state))
-			mod_timer(&adapter->watchdog_timer, jiffies + 1);
+			queue_delayed_work(system_wq, &adapter->watchdog_work,
+					   1);
 	}
 
 	/* Reset on uncorrectable ECC error */
@@ -1901,7 +1903,8 @@ static irqreturn_t e1000_msix_other(int __always_unused irq, void *data)
 		hw->mac.get_link_status = true;
 		/* guard against interrupt when we're going down */
 		if (!test_bit(__E1000_DOWN, &adapter->state))
-			mod_timer(&adapter->watchdog_timer, jiffies + 1);
+			queue_delayed_work(system_wq, &adapter->watchdog_work,
+					   1);
 	}
 
 	if (!test_bit(__E1000_DOWN, &adapter->state))
@@ -4293,7 +4296,8 @@ void e1000e_down(struct e1000_adapter *adapter, bool reset)
 
 	napi_synchronize(&adapter->napi);
 
-	del_timer_sync(&adapter->watchdog_timer);
+	cancel_delayed_work_sync(&adapter->watchdog_work);
+
 	del_timer_sync(&adapter->phy_info_timer);
 
 	spin_lock(&adapter->stats64_lock);
@@ -5164,25 +5168,12 @@ static void e1000e_check_82574_phy_workaround(struct e1000_adapter *adapter)
 	}
 }
 
-/**
- * e1000_watchdog - Timer Call-back
- * @t: pointer to timer_list containing private info adapter
- **/
-static void e1000_watchdog(struct timer_list *t)
-{
-	struct e1000_adapter *adapter = from_timer(adapter, t, watchdog_timer);
-
-	/* Do the rest outside of interrupt context */
-	schedule_work(&adapter->watchdog_task);
-
-	/* TODO: make this use queue_delayed_work() */
-}
-
 static void e1000_watchdog_task(struct work_struct *work)
 {
-	struct e1000_adapter *adapter = container_of(work,
-						     struct e1000_adapter,
-						     watchdog_task);
+	struct delayed_work *dwork =
+		container_of(work, struct delayed_work, work);
+	struct e1000_adapter *adapter =
+		container_of(dwork, struct e1000_adapter, watchdog_work);
 	struct net_device *netdev = adapter->netdev;
 	struct e1000_mac_info *mac = &adapter->hw.mac;
 	struct e1000_phy_info *phy = &adapter->hw.phy;
@@ -5411,8 +5402,8 @@ static void e1000_watchdog_task(struct work_struct *work)
 
 	/* Reset the timer */
 	if (!test_bit(__E1000_DOWN, &adapter->state))
-		mod_timer(&adapter->watchdog_timer,
-			  round_jiffies(jiffies + 2 * HZ));
+		queue_delayed_work(system_wq, &adapter->watchdog_work,
+				   round_jiffies(2 * HZ));
 }
 
 #define E1000_TX_FLAGS_CSUM		0x00000001
@@ -7588,11 +7579,10 @@ static int e1000_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 		goto err_eeprom;
 	}
 
-	timer_setup(&adapter->watchdog_timer, e1000_watchdog, 0);
 	timer_setup(&adapter->phy_info_timer, e1000_update_phy_info, 0);
+	INIT_DELAYED_WORK(&adapter->watchdog_work, e1000_watchdog_task);
 
 	INIT_WORK(&adapter->reset_task, e1000_reset_task);
-	INIT_WORK(&adapter->watchdog_task, e1000_watchdog_task);
 	INIT_WORK(&adapter->downshift_task, e1000e_downshift_workaround);
 	INIT_WORK(&adapter->update_phy_task, e1000e_update_phy_task);
 	INIT_WORK(&adapter->print_hang_task, e1000_print_hw_hang);
@@ -7733,11 +7723,10 @@ static void e1000_remove(struct pci_dev *pdev)
 	 * from being rescheduled.
 	 */
 	set_bit(__E1000_DOWN, &adapter->state);
-	del_timer_sync(&adapter->watchdog_timer);
+	cancel_delayed_work_sync(&adapter->watchdog_work);
 	del_timer_sync(&adapter->phy_info_timer);
 
 	cancel_work_sync(&adapter->reset_task);
-	cancel_work_sync(&adapter->watchdog_task);
 	cancel_work_sync(&adapter->downshift_task);
 	cancel_work_sync(&adapter->update_phy_task);
 	cancel_work_sync(&adapter->print_hang_task);
-- 
2.45.2