drivers/net: don't use flush_scheduled_work()

flush_scheduled_work() is on its way out.  This patch contains simple
conversions to replace flush_scheduled_work() usage with direct
cancels and flushes.

Directly cancel the used works on driver detach and flush them in
other cases.

The conversions are mostly straight forward and the only dangers are,

* Forgetting to cancel/flush one or more used works.

* Cancelling when a work should be flushed (ie. the work must be
  executed once scheduled whether the driver is detaching or not).

I've gone over the changes multiple times but it would be much
appreciated if you can review with the above points in mind.

Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Jay Cliburn <jcliburn@gmail.com>
Cc: Michael Chan <mchan@broadcom.com>
Cc: Divy Le Ray <divy@chelsio.com>
Cc: e1000-devel@lists.sourceforge.net
Cc: Vasanthy Kolluri <vkolluri@cisco.com>
Cc: Samuel Ortiz <samuel@sortiz.org>
Cc: Lennert Buytenhek <buytenh@wantstofly.org>
Cc: Andrew Gallatin <gallatin@myri.com>
Cc: Francois Romieu <romieu@fr.zoreil.com>
Cc: Ramkrishna Vepa <ramkrishna.vepa@exar.com>
Cc: Matt Carlson <mcarlson@broadcom.com>
Cc: David Brownell <dbrownell@users.sourceforge.net>
Cc: Shreyas Bhatewara <sbhatewara@vmware.com>
Cc: netdev@vger.kernel.org

Author: htejun

drivers/net/8139too.c

@@ -1092,10 +1092,11 @@ static int __devinit rtl8139_init_one (struct pci_dev *pdev,
 static void __devexit rtl8139_remove_one (struct pci_dev *pdev)
 {
 	struct net_device *dev = pci_get_drvdata (pdev);
+	struct rtl8139_private *tp = netdev_priv(dev);
 
 	assert (dev != NULL);
 
-	flush_scheduled_work();
+	cancel_delayed_work_sync(&tp->thread);
 
 	unregister_netdev (dev);
 

drivers/net/atlx/atl2.c

@@ -1504,8 +1504,8 @@ static void __devexit atl2_remove(struct pci_dev *pdev)
 
 	del_timer_sync(&adapter->watchdog_timer);
 	del_timer_sync(&adapter->phy_config_timer);
-
-	flush_scheduled_work();
+	cancel_work_sync(&adapter->reset_task);
+	cancel_work_sync(&adapter->link_chg_task);
 
 	unregister_netdev(netdev);
 

drivers/net/bcm63xx_enet.c

@@ -1097,7 +1097,7 @@ static int bcm_enet_stop(struct net_device *dev)
 	enet_dma_writel(priv, 0, ENETDMA_IRMASK_REG(priv->tx_chan));
 
 	/* make sure no mib update is scheduled */
-	flush_scheduled_work();
+	cancel_work_sync(&priv->mib_update_task);
 
 	/* disable dma & mac */
 	bcm_enet_disable_dma(priv, priv->tx_chan);

drivers/net/bnx2.c

@@ -8393,7 +8393,7 @@ bnx2_remove_one(struct pci_dev *pdev)
 	struct net_device *dev = pci_get_drvdata(pdev);
 	struct bnx2 *bp = netdev_priv(dev);
 
-	flush_scheduled_work();
+	cancel_work_sync(&bp->reset_task);
 
 	unregister_netdev(dev);
 
@@ -8431,7 +8431,7 @@ bnx2_suspend(struct pci_dev *pdev, pm_message_t state)
 	if (!netif_running(dev))
 		return 0;
 
-	flush_scheduled_work();
+	cancel_work_sync(&bp->reset_task);
 	bnx2_netif_stop(bp, true);
 	netif_device_detach(dev);
 	del_timer_sync(&bp->timer);

drivers/net/cassini.c

@@ -3880,7 +3880,7 @@ static int cas_change_mtu(struct net_device *dev, int new_mtu)
 	schedule_work(&cp->reset_task);
 #endif
 
-	flush_scheduled_work();
+	flush_work_sync(&cp->reset_task);
 	return 0;
 }
 
@@ -5177,7 +5177,7 @@ static void __devexit cas_remove_one(struct pci_dev *pdev)
 		vfree(cp->fw_data);
 
 	mutex_lock(&cp->pm_mutex);
-	flush_scheduled_work();
+	cancel_work_sync(&cp->reset_task);
 	if (cp->hw_running)
 		cas_shutdown(cp);
 	mutex_unlock(&cp->pm_mutex);

drivers/net/cxgb3/cxgb3_main.c

@@ -1359,6 +1359,7 @@ static int offload_open(struct net_device *dev)
 static int offload_close(struct t3cdev *tdev)
 {
 	struct adapter *adapter = tdev2adap(tdev);
+	struct t3c_data *td = T3C_DATA(tdev);
 
 	if (!test_bit(OFFLOAD_DEVMAP_BIT, &adapter->open_device_map))
 		return 0;
@@ -1369,7 +1370,7 @@ static int offload_close(struct t3cdev *tdev)
 	sysfs_remove_group(&tdev->lldev->dev.kobj, &offload_attr_group);
 
 	/* Flush work scheduled while releasing TIDs */
-	flush_scheduled_work();
+	flush_work_sync(&td->tid_release_task);
 
 	tdev->lldev = NULL;
 	cxgb3_set_dummy_ops(tdev);

drivers/net/e1000e/netdev.c

@@ -6028,8 +6028,8 @@ static void __devexit e1000_remove(struct pci_dev *pdev)
 	bool down = test_bit(__E1000_DOWN, &adapter->state);
 
 	/*
-	 * flush_scheduled work may reschedule our watchdog task, so
-	 * explicitly disable watchdog tasks from being rescheduled
+	 * The timers may be rescheduled, so explicitly disable them
+	 * from being rescheduled.
 	 */
 	if (!down)
 		set_bit(__E1000_DOWN, &adapter->state);
@@ -6040,8 +6040,8 @@ static void __devexit e1000_remove(struct pci_dev *pdev)
 	cancel_work_sync(&adapter->watchdog_task);
 	cancel_work_sync(&adapter->downshift_task);
 	cancel_work_sync(&adapter->update_phy_task);
+	cancel_work_sync(&adapter->led_blink_task);
 	cancel_work_sync(&adapter->print_hang_task);
-	flush_scheduled_work();
 
 	if (!(netdev->flags & IFF_UP))
 		e1000_power_down_phy(adapter);

drivers/net/enic/enic_main.c

@@ -2834,7 +2834,7 @@ static void __devexit enic_remove(struct pci_dev *pdev)
 	if (netdev) {
 		struct enic *enic = netdev_priv(netdev);
 
-		flush_scheduled_work();
+		cancel_work_sync(&enic->reset);
 		unregister_netdev(netdev);
 		enic_dev_deinit(enic);
 		vnic_dev_close(enic->vdev);

drivers/net/ibm_newemac/core.c

@@ -2950,7 +2950,7 @@ static int __devexit emac_remove(struct platform_device *ofdev)
 
 	unregister_netdev(dev->ndev);
 
-	flush_scheduled_work();
+	cancel_work_sync(&dev->reset_work);
 
 	if (emac_has_feature(dev, EMAC_FTR_HAS_TAH))
 		tah_detach(dev->tah_dev, dev->tah_port);

drivers/net/irda/mcs7780.c

@@ -959,7 +959,7 @@ static void mcs_disconnect(struct usb_interface *intf)
 	if (!mcs)
 		return;
 
-	flush_scheduled_work();
+	cancel_work_sync(&mcs->work);
 
 	unregister_netdev(mcs->netdev);
 	free_netdev(mcs->netdev);