[PATCH] usb suspend updates (interface suspend)

This is the first of a few installments of PM API updates to match the
recent switch to "pm_message_t".  This installment primarily affects
USB device drivers (for USB interfaces), and it changes the handful of
drivers which currently implement suspend methods:

    - <linux/usb.h> and usbcore, signature change

    - Some drivers only changed the signature, net effect this just
      shuts up "sparse -Wbitwise":
	* hid-core
	* stir4200

    - Two network drivers did that, and also grew slightly more
      featureful suspend code ... they now properly shut down
      their activities.  (As should stir4200...)
	* pegasus
	* usbnet

Note that the Wake-On-Lan (WOL) support in pegasus doesn't yet work; looks
to me like it's missing a request to turn it on, vs just configuring it.
The ASIX code in usbnet also has WOL hooks that are ready to use; untested.

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

Index: gregkh-2.6/drivers/net/irda/stir4200.c
===================================================================

drivers/net/irda/stir4200.c

@@ -1128,8 +1128,8 @@ static void stir_disconnect(struct usb_interface *intf)
 }
 
 #ifdef CONFIG_PM
-/* Power management suspend, so power off the transmitter/receiver */
-static int stir_suspend(struct usb_interface *intf, u32 state)
+/* USB suspend, so power off the transmitter/receiver */
+static int stir_suspend(struct usb_interface *intf, pm_message_t message)
 {
 	struct stir_cb *stir = usb_get_intfdata(intf);
 

drivers/usb/core/hub.c

@@ -1731,7 +1731,7 @@ static int finish_port_resume(struct usb_device *udev)
 			struct usb_driver	*driver;
 
 			intf = udev->actconfig->interface[i];
-			if (intf->dev.power.power_state == PM_SUSPEND_ON)
+			if (intf->dev.power.power_state == PMSG_SUSPEND)
 				continue;
 			if (!intf->dev.driver) {
 				/* FIXME maybe force to alt 0 */
@@ -1745,7 +1745,7 @@ static int finish_port_resume(struct usb_device *udev)
 
 			/* can we do better than just logging errors? */
 			status = driver->resume(intf);
-			if (intf->dev.power.power_state != PM_SUSPEND_ON
+			if (intf->dev.power.power_state != PMSG_ON
 					|| status)
 				dev_dbg(&intf->dev,
 					"resume fail, state %d code %d\n",

drivers/usb/core/usb.c

@@ -1382,13 +1382,13 @@ void usb_buffer_unmap_sg (struct usb_device *dev, unsigned pipe,
 			usb_pipein (pipe) ? DMA_FROM_DEVICE : DMA_TO_DEVICE);
 }
 
-static int usb_generic_suspend(struct device *dev, u32 state)
+static int usb_generic_suspend(struct device *dev, pm_message_t message)
 {
 	struct usb_interface *intf;
 	struct usb_driver *driver;
 
 	if (dev->driver == &usb_generic_driver)
-		return usb_suspend_device (to_usb_device(dev), state);
+		return usb_suspend_device (to_usb_device(dev), message);
 
 	if ((dev->driver == NULL) ||
 	    (dev->driver_data == &usb_generic_driver_data))
@@ -1402,7 +1402,7 @@ static int usb_generic_suspend(struct device *dev, u32 state)
 		return 0;
 
 	if (driver->suspend)
-		return driver->suspend(intf, state);
+		return driver->suspend(intf, message);
 	return 0;
 }
 

drivers/usb/input/hid-core.c

@@ -1790,12 +1790,12 @@ static int hid_probe(struct usb_interface *intf, const struct usb_device_id *id)
 	return 0;
 }
 
-static int hid_suspend(struct usb_interface *intf, u32 state)
+static int hid_suspend(struct usb_interface *intf, pm_message_t message)
 {
 	struct hid_device *hid = usb_get_intfdata (intf);
 
 	usb_kill_urb(hid->urbin);
-	intf->dev.power.power_state = state;
+	intf->dev.power.power_state = PMSG_SUSPEND;
 	dev_dbg(&intf->dev, "suspend\n");
 	return 0;
 }
@@ -1805,7 +1805,7 @@ static int hid_resume(struct usb_interface *intf)
 	struct hid_device *hid = usb_get_intfdata (intf);
 	int status;
 
-	intf->dev.power.power_state = PM_SUSPEND_ON;
+	intf->dev.power.power_state = PMSG_ON;
 	if (hid->open)
 		status = usb_submit_urb(hid->urbin, GFP_NOIO);
 	else

drivers/usb/net/pegasus.c

@@ -1364,11 +1364,18 @@ static void pegasus_disconnect(struct usb_interface *intf)
 	free_netdev(pegasus->net);
 }
 
-static int pegasus_suspend (struct usb_interface *intf, pm_message_t state)
+static int pegasus_suspend (struct usb_interface *intf, pm_message_t message)
 {
 	struct pegasus *pegasus = usb_get_intfdata(intf);
 	
 	netif_device_detach (pegasus->net);
+	if (netif_running(pegasus->net)) {
+		cancel_delayed_work(&pegasus->carrier_check);
+
+		usb_kill_urb(pegasus->rx_urb);
+		usb_kill_urb(pegasus->intr_urb);
+	}
+	intf->dev.power.power_state = PMSG_SUSPEND;
 	return 0;
 }
 
@@ -1376,7 +1383,20 @@ static int pegasus_resume (struct usb_interface *intf)
 {
 	struct pegasus *pegasus = usb_get_intfdata(intf);
 
+	intf->dev.power.power_state = PMSG_ON;
 	netif_device_attach (pegasus->net);
+	if (netif_running(pegasus->net)) {
+		pegasus->rx_urb->status = 0;
+		pegasus->rx_urb->actual_length = 0;
+		read_bulk_callback(pegasus->rx_urb, 0);
+
+		pegasus->intr_urb->status = 0;
+		pegasus->intr_urb->actual_length = 0;
+		intr_callback(pegasus->intr_urb, 0);
+
+		queue_delayed_work(pegasus_workqueue, &pegasus->carrier_check,
+					CARRIER_CHECK_DELAY);
+	}
 	return 0;
 }
 

drivers/usb/net/usbnet.c

@@ -3732,11 +3732,17 @@ out:
 
 #ifdef	CONFIG_PM
 
-static int usbnet_suspend (struct usb_interface *intf, u32 state)
+static int usbnet_suspend (struct usb_interface *intf, pm_message_t message)
 {
 	struct usbnet		*dev = usb_get_intfdata(intf);
 	
+	/* accelerate emptying of the rx and queues, to avoid
+	 * having everything error out.
+	 */
 	netif_device_detach (dev->net);
+	(void) unlink_urbs (dev, &dev->rxq);
+	(void) unlink_urbs (dev, &dev->txq);
+	intf->dev.power.power_state = PMSG_SUSPEND;
 	return 0;
 }
 
@@ -3744,7 +3750,9 @@ static int usbnet_resume (struct usb_interface *intf)
 {
 	struct usbnet		*dev = usb_get_intfdata(intf);
 
+	intf->dev.power.power_state = PMSG_ON;
 	netif_device_attach (dev->net);
+	tasklet_schedule (&dev->bh);
 	return 0;
 }
 

include/linux/usb.h

@@ -558,7 +558,7 @@ struct usb_driver {
 
 	int (*ioctl) (struct usb_interface *intf, unsigned int code, void *buf);
 
-	int (*suspend) (struct usb_interface *intf, u32 state);
+	int (*suspend) (struct usb_interface *intf, pm_message_t message);
 	int (*resume) (struct usb_interface *intf);
 
 	const struct usb_device_id *id_table;
@@ -977,7 +977,7 @@ extern int usb_bulk_msg(struct usb_device *usb_dev, unsigned int pipe,
 	int timeout);
 
 /* selective suspend/resume */
-extern int usb_suspend_device(struct usb_device *dev, u32 state);
+extern int usb_suspend_device(struct usb_device *dev, pm_message_t message);
 extern int usb_resume_device(struct usb_device *dev);