Merge branch 'autosuspend' into for-next

Conflicts:

	drivers/hid/hid-core.c

drivers/hid/hid-core.c

@@ -1819,6 +1819,22 @@ void hid_unregister_driver(struct hid_driver *hdrv)
 }
 EXPORT_SYMBOL_GPL(hid_unregister_driver);
 
+int hid_check_keys_pressed(struct hid_device *hid)
+{
+	struct hid_input *hidinput;
+	int i;
+
+	list_for_each_entry(hidinput, &hid->inputs, list) {
+		for (i = 0; i < BITS_TO_LONGS(KEY_MAX); i++)
+			if (hidinput->input->key[i])
+				return 1;
+	}
+
+	return 0;
+}
+
+EXPORT_SYMBOL_GPL(hid_check_keys_pressed);
+
 static int __init hid_init(void)
 {
 	int ret;

drivers/hid/hidraw.c

@@ -181,10 +181,18 @@ static int hidraw_open(struct inode *inode, struct file *file)
 
 	dev = hidraw_table[minor];
 	if (!dev->open++) {
-		err = dev->hid->ll_driver->open(dev->hid);
+		if (dev->hid->ll_driver->power) {
+			err = dev->hid->ll_driver->power(dev->hid, PM_HINT_FULLON);
 			if (err < 0)
+				goto out_unlock;
+		}
+		err = dev->hid->ll_driver->open(dev->hid);
+		if (err < 0) {
+			if (dev->hid->ll_driver->power)
+				dev->hid->ll_driver->power(dev->hid, PM_HINT_NORMAL);
 			dev->open--;
 		}
+	}
 
 out_unlock:
 	mutex_unlock(&minors_lock);
@@ -209,11 +217,14 @@ static int hidraw_release(struct inode * inode, struct file * file)
 	list_del(&list->node);
 	dev = hidraw_table[minor];
 	if (!--dev->open) {
-		if (list->hidraw->exist)
+		if (list->hidraw->exist) {
+			if (dev->hid->ll_driver->power)
+				dev->hid->ll_driver->power(dev->hid, PM_HINT_NORMAL);
 			dev->hid->ll_driver->close(dev->hid);
-		else
+		} else {
 			kfree(list->hidraw);
 		}
+	}
 
 	kfree(list);
 

drivers/hid/usbhid/hid-core.c

@@ -5,6 +5,7 @@
  *  Copyright (c) 2000-2005 Vojtech Pavlik <vojtech@suse.cz>
  *  Copyright (c) 2005 Michael Haboustak <mike-@cinci.rr.com> for Concept2, Inc
  *  Copyright (c) 2006-2008 Jiri Kosina
+ *  Copyright (c) 2007-2008 Oliver Neukum
  */
 
 /*
@@ -27,6 +28,7 @@
 #include <asm/byteorder.h>
 #include <linux/input.h>
 #include <linux/wait.h>
+#include <linux/workqueue.h>
 
 #include <linux/usb.h>
 
@@ -53,6 +55,10 @@ static unsigned int hid_mousepoll_interval;
 module_param_named(mousepoll, hid_mousepoll_interval, uint, 0644);
 MODULE_PARM_DESC(mousepoll, "Polling interval of mice");
 
+static unsigned int ignoreled;
+module_param_named(ignoreled, ignoreled, uint, 0644);
+MODULE_PARM_DESC(ignoreled, "Autosuspend with active leds");
+
 /* Quirks specified at module load time */
 static char *quirks_param[MAX_USBHID_BOOT_QUIRKS] = { [ 0 ... (MAX_USBHID_BOOT_QUIRKS - 1) ] = NULL };
 module_param_array_named(quirks, quirks_param, charp, NULL, 0444);
@@ -63,8 +69,13 @@ MODULE_PARM_DESC(quirks, "Add/modify USB HID quirks by specifying "
 /*
  * Input submission and I/O error handler.
  */
+static DEFINE_MUTEX(hid_open_mut);
+static struct workqueue_struct *resumption_waker;
 
 static void hid_io_error(struct hid_device *hid);
+static int hid_submit_out(struct hid_device *hid);
+static int hid_submit_ctrl(struct hid_device *hid);
+static void hid_cancel_delayed_stuff(struct usbhid_device *usbhid);
 
 /* Start up the input URB */
 static int hid_start_in(struct hid_device *hid)
@@ -73,15 +84,16 @@ static int hid_start_in(struct hid_device *hid)
 	int rc = 0;
 	struct usbhid_device *usbhid = hid->driver_data;
 
-	spin_lock_irqsave(&usbhid->inlock, flags);
-	if (hid->open > 0 && !test_bit(HID_SUSPENDED, &usbhid->iofl) &&
+	spin_lock_irqsave(&usbhid->lock, flags);
+	if (hid->open > 0 &&
 			!test_bit(HID_DISCONNECTED, &usbhid->iofl) &&
+			!test_bit(HID_REPORTED_IDLE, &usbhid->iofl) &&
 			!test_and_set_bit(HID_IN_RUNNING, &usbhid->iofl)) {
 		rc = usb_submit_urb(usbhid->urbin, GFP_ATOMIC);
 		if (rc != 0)
 			clear_bit(HID_IN_RUNNING, &usbhid->iofl);
 	}
-	spin_unlock_irqrestore(&usbhid->inlock, flags);
+	spin_unlock_irqrestore(&usbhid->lock, flags);
 	return rc;
 }
 
@@ -145,7 +157,7 @@ static void hid_io_error(struct hid_device *hid)
 	unsigned long flags;
 	struct usbhid_device *usbhid = hid->driver_data;
 
-	spin_lock_irqsave(&usbhid->inlock, flags);
+	spin_lock_irqsave(&usbhid->lock, flags);
 
 	/* Stop when disconnected */
 	if (test_bit(HID_DISCONNECTED, &usbhid->iofl))
@@ -175,7 +187,51 @@ static void hid_io_error(struct hid_device *hid)
 	mod_timer(&usbhid->io_retry,
 			jiffies + msecs_to_jiffies(usbhid->retry_delay));
 done:
-	spin_unlock_irqrestore(&usbhid->inlock, flags);
+	spin_unlock_irqrestore(&usbhid->lock, flags);
+}
+
+static void usbhid_mark_busy(struct usbhid_device *usbhid)
+{
+	struct usb_interface *intf = usbhid->intf;
+
+	usb_mark_last_busy(interface_to_usbdev(intf));
+}
+
+static int usbhid_restart_out_queue(struct usbhid_device *usbhid)
+{
+	struct hid_device *hid = usb_get_intfdata(usbhid->intf);
+	int kicked;
+
+	if (!hid)
+		return 0;
+
+	if ((kicked = (usbhid->outhead != usbhid->outtail))) {
+		dbg("Kicking head %d tail %d", usbhid->outhead, usbhid->outtail);
+		if (hid_submit_out(hid)) {
+			clear_bit(HID_OUT_RUNNING, &usbhid->iofl);
+			wake_up(&usbhid->wait);
+		}
+	}
+	return kicked;
+}
+
+static int usbhid_restart_ctrl_queue(struct usbhid_device *usbhid)
+{
+	struct hid_device *hid = usb_get_intfdata(usbhid->intf);
+	int kicked;
+
+	WARN_ON(hid == NULL);
+	if (!hid)
+		return 0;
+
+	if ((kicked = (usbhid->ctrlhead != usbhid->ctrltail))) {
+		dbg("Kicking head %d tail %d", usbhid->ctrlhead, usbhid->ctrltail);
+		if (hid_submit_ctrl(hid)) {
+			clear_bit(HID_CTRL_RUNNING, &usbhid->iofl);
+			wake_up(&usbhid->wait);
+		}
+	}
+	return kicked;
 }
 
 /*
@@ -190,12 +246,23 @@ static void hid_irq_in(struct urb *urb)
 
 	switch (urb->status) {
 	case 0:			/* success */
+		usbhid_mark_busy(usbhid);
 		usbhid->retry_delay = 0;
 		hid_input_report(urb->context, HID_INPUT_REPORT,
 				 urb->transfer_buffer,
 				 urb->actual_length, 1);
+		/*
+		 * autosuspend refused while keys are pressed
+		 * because most keyboards don't wake up when
+		 * a key is released
+		 */
+		if (hid_check_keys_pressed(hid))
+			set_bit(HID_KEYS_PRESSED, &usbhid->iofl);
+		else
+			clear_bit(HID_KEYS_PRESSED, &usbhid->iofl);
 		break;
 	case -EPIPE:		/* stall */
+		usbhid_mark_busy(usbhid);
 		clear_bit(HID_IN_RUNNING, &usbhid->iofl);
 		set_bit(HID_CLEAR_HALT, &usbhid->iofl);
 		schedule_work(&usbhid->reset_work);
@@ -209,6 +276,7 @@ static void hid_irq_in(struct urb *urb)
 	case -EPROTO:		/* protocol error or unplug */
 	case -ETIME:		/* protocol error or unplug */
 	case -ETIMEDOUT:	/* Should never happen, but... */
+		usbhid_mark_busy(usbhid);
 		clear_bit(HID_IN_RUNNING, &usbhid->iofl);
 		hid_io_error(hid);
 		return;
@@ -239,6 +307,7 @@ static int hid_submit_out(struct hid_device *hid)
 	report = usbhid->out[usbhid->outtail].report;
 	raw_report = usbhid->out[usbhid->outtail].raw_report;
 
+	if (!test_bit(HID_REPORTED_IDLE, &usbhid->iofl)) {
 		usbhid->urbout->transfer_buffer_length = ((report->size - 1) >> 3) + 1 + (report->id > 0);
 		usbhid->urbout->dev = hid_to_usb_dev(hid);
 		memcpy(usbhid->outbuf, raw_report, usbhid->urbout->transfer_buffer_length);
@@ -250,6 +319,14 @@ static int hid_submit_out(struct hid_device *hid)
 			err_hid("usb_submit_urb(out) failed");
 			return -1;
 		}
+	} else {
+		/*
+		 * queue work to wake up the device.
+		 * as the work queue is freezeable, this is safe
+		 * with respect to STD and STR
+		 */
+		queue_work(resumption_waker, &usbhid->restart_work);
+	}
 
 	return 0;
 }
@@ -266,6 +343,7 @@ static int hid_submit_ctrl(struct hid_device *hid)
 	raw_report = usbhid->ctrl[usbhid->ctrltail].raw_report;
 	dir = usbhid->ctrl[usbhid->ctrltail].dir;
 
+	if (!test_bit(HID_REPORTED_IDLE, &usbhid->iofl)) {
 		len = ((report->size - 1) >> 3) + 1 + (report->id > 0);
 		if (dir == USB_DIR_OUT) {
 			usbhid->urbctrl->pipe = usb_sndctrlpipe(hid_to_usb_dev(hid), 0);
@@ -302,6 +380,14 @@ static int hid_submit_ctrl(struct hid_device *hid)
 			err_hid("usb_submit_urb(ctrl) failed");
 			return -1;
 		}
+	} else {
+		/*
+		 * queue work to wake up the device.
+		 * as the work queue is freezeable, this is safe
+		 * with respect to STD and STR
+		 */
+		queue_work(resumption_waker, &usbhid->restart_work);
+	}
 
 	return 0;
 }
@@ -332,7 +418,7 @@ static void hid_irq_out(struct urb *urb)
 				"received\n", urb->status);
 	}
 
-	spin_lock_irqsave(&usbhid->outlock, flags);
+	spin_lock_irqsave(&usbhid->lock, flags);
 
 	if (unplug)
 		usbhid->outtail = usbhid->outhead;
@@ -344,12 +430,12 @@ static void hid_irq_out(struct urb *urb)
 			clear_bit(HID_OUT_RUNNING, &usbhid->iofl);
 			wake_up(&usbhid->wait);
 		}
-		spin_unlock_irqrestore(&usbhid->outlock, flags);
+		spin_unlock_irqrestore(&usbhid->lock, flags);
 		return;
 	}
 
 	clear_bit(HID_OUT_RUNNING, &usbhid->iofl);
-	spin_unlock_irqrestore(&usbhid->outlock, flags);
+	spin_unlock_irqrestore(&usbhid->lock, flags);
 	wake_up(&usbhid->wait);
 }
 
@@ -361,12 +447,11 @@ static void hid_ctrl(struct urb *urb)
 {
 	struct hid_device *hid = urb->context;
 	struct usbhid_device *usbhid = hid->driver_data;
-	unsigned long flags;
-	int unplug = 0;
+	int unplug = 0, status = urb->status;
 
-	spin_lock_irqsave(&usbhid->ctrllock, flags);
+	spin_lock(&usbhid->lock);
 
-	switch (urb->status) {
+	switch (status) {
 	case 0:			/* success */
 		if (usbhid->ctrl[usbhid->ctrltail].dir == USB_DIR_IN)
 			hid_input_report(urb->context,
@@ -383,7 +468,7 @@ static void hid_ctrl(struct urb *urb)
 		break;
 	default:		/* error */
 		dev_warn(&urb->dev->dev, "ctrl urb status %d "
-				"received\n", urb->status);
+				"received\n", status);
 	}
 
 	if (unplug)
@@ -396,19 +481,18 @@ static void hid_ctrl(struct urb *urb)
 			clear_bit(HID_CTRL_RUNNING, &usbhid->iofl);
 			wake_up(&usbhid->wait);
 		}
-		spin_unlock_irqrestore(&usbhid->ctrllock, flags);
+		spin_unlock(&usbhid->lock);
 		return;
 	}
 
 	clear_bit(HID_CTRL_RUNNING, &usbhid->iofl);
-	spin_unlock_irqrestore(&usbhid->ctrllock, flags);
+	spin_unlock(&usbhid->lock);
 	wake_up(&usbhid->wait);
 }
 
-void usbhid_submit_report(struct hid_device *hid, struct hid_report *report, unsigned char dir)
+void __usbhid_submit_report(struct hid_device *hid, struct hid_report *report, unsigned char dir)
 {
 	int head;
-	unsigned long flags;
 	struct usbhid_device *usbhid = hid->driver_data;
 	int len = ((report->size - 1) >> 3) + 1 + (report->id > 0);
 
@@ -416,18 +500,13 @@ void usbhid_submit_report(struct hid_device *hid, struct hid_report *report, uns
 		return;
 
 	if (usbhid->urbout && dir == USB_DIR_OUT && report->type == HID_OUTPUT_REPORT) {
-
-		spin_lock_irqsave(&usbhid->outlock, flags);
-
 		if ((head = (usbhid->outhead + 1) & (HID_OUTPUT_FIFO_SIZE - 1)) == usbhid->outtail) {
-			spin_unlock_irqrestore(&usbhid->outlock, flags);
 			dev_warn(&hid->dev, "output queue full\n");
 			return;
 		}
 
 		usbhid->out[usbhid->outhead].raw_report = kmalloc(len, GFP_ATOMIC);
 		if (!usbhid->out[usbhid->outhead].raw_report) {
-			spin_unlock_irqrestore(&usbhid->outlock, flags);
 			dev_warn(&hid->dev, "output queueing failed\n");
 			return;
 		}
@@ -438,15 +517,10 @@ void usbhid_submit_report(struct hid_device *hid, struct hid_report *report, uns
 		if (!test_and_set_bit(HID_OUT_RUNNING, &usbhid->iofl))
 			if (hid_submit_out(hid))
 				clear_bit(HID_OUT_RUNNING, &usbhid->iofl);
-
-		spin_unlock_irqrestore(&usbhid->outlock, flags);
 		return;
 	}
 
-	spin_lock_irqsave(&usbhid->ctrllock, flags);
-
 	if ((head = (usbhid->ctrlhead + 1) & (HID_CONTROL_FIFO_SIZE - 1)) == usbhid->ctrltail) {
-		spin_unlock_irqrestore(&usbhid->ctrllock, flags);
 		dev_warn(&hid->dev, "control queue full\n");
 		return;
 	}
@@ -454,7 +528,6 @@ void usbhid_submit_report(struct hid_device *hid, struct hid_report *report, uns
 	if (dir == USB_DIR_OUT) {
 		usbhid->ctrl[usbhid->ctrlhead].raw_report = kmalloc(len, GFP_ATOMIC);
 		if (!usbhid->ctrl[usbhid->ctrlhead].raw_report) {
-			spin_unlock_irqrestore(&usbhid->ctrllock, flags);
 			dev_warn(&hid->dev, "control queueing failed\n");
 			return;
 		}
@@ -467,15 +540,25 @@ void usbhid_submit_report(struct hid_device *hid, struct hid_report *report, uns
 	if (!test_and_set_bit(HID_CTRL_RUNNING, &usbhid->iofl))
 		if (hid_submit_ctrl(hid))
 			clear_bit(HID_CTRL_RUNNING, &usbhid->iofl);
+}
 
-	spin_unlock_irqrestore(&usbhid->ctrllock, flags);
+void usbhid_submit_report(struct hid_device *hid, struct hid_report *report, unsigned char dir)
+{
+	struct usbhid_device *usbhid = hid->driver_data;
+	unsigned long flags;
+
+	spin_lock_irqsave(&usbhid->lock, flags);
+	__usbhid_submit_report(hid, report, dir);
+	spin_unlock_irqrestore(&usbhid->lock, flags);
 }
 EXPORT_SYMBOL_GPL(usbhid_submit_report);
 
 static int usb_hidinput_input_event(struct input_dev *dev, unsigned int type, unsigned int code, int value)
 {
 	struct hid_device *hid = input_get_drvdata(dev);
+	struct usbhid_device *usbhid = hid->driver_data;
 	struct hid_field *field;
+	unsigned long flags;
 	int offset;
 
 	if (type == EV_FF)
@@ -490,6 +573,15 @@ static int usb_hidinput_input_event(struct input_dev *dev, unsigned int type, un
 	}
 
 	hid_set_field(field, offset, value);
+	if (value) {
+		spin_lock_irqsave(&usbhid->lock, flags);
+		usbhid->ledcount++;
+		spin_unlock_irqrestore(&usbhid->lock, flags);
+	} else {
+		spin_lock_irqsave(&usbhid->lock, flags);
+		usbhid->ledcount--;
+		spin_unlock_irqrestore(&usbhid->lock, flags);
+	}
 	usbhid_submit_report(hid, field->report, USB_DIR_OUT);
 
 	return 0;
@@ -538,15 +630,22 @@ int usbhid_open(struct hid_device *hid)
 	struct usbhid_device *usbhid = hid->driver_data;
 	int res;
 
+	mutex_lock(&hid_open_mut);
 	if (!hid->open++) {
 		res = usb_autopm_get_interface(usbhid->intf);
+		/* the device must be awake to reliable request remote wakeup */
 		if (res < 0) {
 			hid->open--;
+			mutex_unlock(&hid_open_mut);
 			return -EIO;
 		}
-	}
+		usbhid->intf->needs_remote_wakeup = 1;
 		if (hid_start_in(hid))
 			hid_io_error(hid);
+ 
+		usb_autopm_put_interface(usbhid->intf);
+	}
+	mutex_unlock(&hid_open_mut);
 	return 0;
 }
 
@@ -554,10 +653,22 @@ void usbhid_close(struct hid_device *hid)
 {
 	struct usbhid_device *usbhid = hid->driver_data;
 
+	mutex_lock(&hid_open_mut);
+
+	/* protecting hid->open to make sure we don't restart
+	 * data acquistion due to a resumption we no longer
+	 * care about
+	 */
+	spin_lock_irq(&usbhid->lock);
 	if (!--hid->open) {
+		spin_unlock_irq(&usbhid->lock);
 		usb_kill_urb(usbhid->urbin);
-		usb_autopm_put_interface(usbhid->intf);
+		flush_scheduled_work();
+		usbhid->intf->needs_remote_wakeup = 0;
+	} else {
+		spin_unlock_irq(&usbhid->lock);
 	}
+	mutex_unlock(&hid_open_mut);
 }
 
 /*
@@ -687,6 +798,25 @@ static int usbhid_output_raw_report(struct hid_device *hid, __u8 *buf, size_t co
 	return ret;
 }
 
+static void usbhid_restart_queues(struct usbhid_device *usbhid)
+{
+	if (usbhid->urbout)
+		usbhid_restart_out_queue(usbhid);
+	usbhid_restart_ctrl_queue(usbhid);
+}
+
+static void __usbhid_restart_queues(struct work_struct *work)
+{
+	struct usbhid_device *usbhid =
+		container_of(work, struct usbhid_device, restart_work);
+	int r;
+
+	r = usb_autopm_get_interface(usbhid->intf);
+	if (r < 0)
+		return;
+	usb_autopm_put_interface(usbhid->intf);
+}
+
 static void hid_free_buffers(struct usb_device *dev, struct hid_device *hid)
 {
 	struct usbhid_device *usbhid = hid->driver_data;
@@ -853,11 +983,11 @@ static int usbhid_start(struct hid_device *hid)
 
 	init_waitqueue_head(&usbhid->wait);
 	INIT_WORK(&usbhid->reset_work, hid_reset);
+	INIT_WORK(&usbhid->restart_work, __usbhid_restart_queues);
 	setup_timer(&usbhid->io_retry, hid_retry_timeout, (unsigned long) hid);
 
-	spin_lock_init(&usbhid->inlock);
-	spin_lock_init(&usbhid->outlock);
-	spin_lock_init(&usbhid->ctrllock);
+	spin_lock_init(&usbhid->lock);
+	spin_lock_init(&usbhid->lock);
 
 	usbhid->intf = intf;
 	usbhid->ifnum = interface->desc.bInterfaceNumber;
@@ -909,15 +1039,14 @@ static void usbhid_stop(struct hid_device *hid)
 		return;
 
 	clear_bit(HID_STARTED, &usbhid->iofl);
-	spin_lock_irq(&usbhid->inlock);	/* Sync with error handler */
+	spin_lock_irq(&usbhid->lock);	/* Sync with error handler */
 	set_bit(HID_DISCONNECTED, &usbhid->iofl);
-	spin_unlock_irq(&usbhid->inlock);
+	spin_unlock_irq(&usbhid->lock);
 	usb_kill_urb(usbhid->urbin);
 	usb_kill_urb(usbhid->urbout);
 	usb_kill_urb(usbhid->urbctrl);
 
-	del_timer_sync(&usbhid->io_retry);
-	cancel_work_sync(&usbhid->reset_work);
+	hid_cancel_delayed_stuff(usbhid);
 
 	if (hid->claimed & HID_CLAIMED_INPUT)
 		hidinput_disconnect(hid);
@@ -938,12 +1067,28 @@ static void usbhid_stop(struct hid_device *hid)
 	hid_free_buffers(hid_to_usb_dev(hid), hid);
 }
 
+static int usbhid_power(struct hid_device *hid, int lvl)
+{
+	int r = 0;
+
+	switch (lvl) {
+	case PM_HINT_FULLON:
+		r = usbhid_get_power(hid);
+		break;
+	case PM_HINT_NORMAL:
+		usbhid_put_power(hid);
+		break;
+	}
+	return r;
+}
+
 static struct hid_ll_driver usb_hid_driver = {
 	.parse = usbhid_parse,
 	.start = usbhid_start,
 	.stop = usbhid_stop,
 	.open = usbhid_open,
 	.close = usbhid_close,
+	.power = usbhid_power,
 	.hidinput_input_event = usb_hidinput_input_event,
 };
 
@@ -1052,19 +1197,126 @@ static void hid_disconnect(struct usb_interface *intf)
 	kfree(usbhid);
 }
 
-static int hid_suspend(struct usb_interface *intf, pm_message_t message)
+static void hid_cancel_delayed_stuff(struct usbhid_device *usbhid)
 {
-	struct hid_device *hid = usb_get_intfdata (intf);
+	del_timer_sync(&usbhid->io_retry);
+	cancel_work_sync(&usbhid->restart_work);
+	cancel_work_sync(&usbhid->reset_work);
+}
+
+static void hid_cease_io(struct usbhid_device *usbhid)
+{
+	del_timer(&usbhid->io_retry);
+	usb_kill_urb(usbhid->urbin);
+	usb_kill_urb(usbhid->urbctrl);
+	usb_kill_urb(usbhid->urbout);
+}
+
+/* Treat USB reset pretty much the same as suspend/resume */
+static int hid_pre_reset(struct usb_interface *intf)
+{
+	struct hid_device *hid = usb_get_intfdata(intf);
 	struct usbhid_device *usbhid = hid->driver_data;
 
-	if (!test_bit(HID_STARTED, &usbhid->iofl))
+	spin_lock_irq(&usbhid->lock);
+	set_bit(HID_RESET_PENDING, &usbhid->iofl);
+	spin_unlock_irq(&usbhid->lock);
+	cancel_work_sync(&usbhid->restart_work);
+	hid_cease_io(usbhid);
+
 	return 0;
+}
 
-	spin_lock_irq(&usbhid->inlock);	/* Sync with error handler */
-	set_bit(HID_SUSPENDED, &usbhid->iofl);
-	spin_unlock_irq(&usbhid->inlock);
-	del_timer_sync(&usbhid->io_retry);
-	usb_kill_urb(usbhid->urbin);
+/* Same routine used for post_reset and reset_resume */
+static int hid_post_reset(struct usb_interface *intf)
+{
+	struct usb_device *dev = interface_to_usbdev (intf);
+	struct hid_device *hid = usb_get_intfdata(intf);
+	struct usbhid_device *usbhid = hid->driver_data;
+	int status;
+ 
+	spin_lock_irq(&usbhid->lock);
+	clear_bit(HID_RESET_PENDING, &usbhid->iofl);
+	spin_unlock_irq(&usbhid->lock);
+	hid_set_idle(dev, intf->cur_altsetting->desc.bInterfaceNumber, 0, 0);
+	/* FIXME: Any more reinitialization needed? */
+	status = hid_start_in(hid);
+	if (status < 0)
+		hid_io_error(hid);
+	usbhid_restart_queues(usbhid);
+
+	return 0;
+}
+
+int usbhid_get_power(struct hid_device *hid)
+{
+	struct usbhid_device *usbhid = hid->driver_data;
+ 
+	return usb_autopm_get_interface(usbhid->intf);
+}
+
+void usbhid_put_power(struct hid_device *hid)
+{
+	struct usbhid_device *usbhid = hid->driver_data;
+ 
+	usb_autopm_put_interface(usbhid->intf);
+}
+
+
+#ifdef CONFIG_PM
+static int hid_suspend(struct usb_interface *intf, pm_message_t message)
+{
+	struct hid_device *hid = usb_get_intfdata(intf);
+	struct usbhid_device *usbhid = hid->driver_data;
+	struct usb_device *udev = interface_to_usbdev(intf);
+	int status;
+
+	if (udev->auto_pm) {
+		spin_lock_irq(&usbhid->lock);	/* Sync with error handler */
+		if (!test_bit(HID_RESET_PENDING, &usbhid->iofl)
+		    && !test_bit(HID_CLEAR_HALT, &usbhid->iofl)
+		    && !test_bit(HID_OUT_RUNNING, &usbhid->iofl)
+		    && !test_bit(HID_CTRL_RUNNING, &usbhid->iofl)
+		    && !test_bit(HID_KEYS_PRESSED, &usbhid->iofl)
+		    && (!usbhid->ledcount || ignoreled))
+		{
+			set_bit(HID_REPORTED_IDLE, &usbhid->iofl);
+			spin_unlock_irq(&usbhid->lock);
+		} else {
+			usbhid_mark_busy(usbhid);
+			spin_unlock_irq(&usbhid->lock);
+			return -EBUSY;
+		}
+
+	} else {
+		spin_lock_irq(&usbhid->lock);
+		set_bit(HID_REPORTED_IDLE, &usbhid->iofl);
+		spin_unlock_irq(&usbhid->lock);
+		if (usbhid_wait_io(hid) < 0)
+			return -EIO;
+	}
+
+	if (!ignoreled && udev->auto_pm) {
+		spin_lock_irq(&usbhid->lock);
+		if (test_bit(HID_LED_ON, &usbhid->iofl)) {
+			spin_unlock_irq(&usbhid->lock);
+			usbhid_mark_busy(usbhid);
+			return -EBUSY;
+		}
+		spin_unlock_irq(&usbhid->lock);
+	}
+
+	hid_cancel_delayed_stuff(usbhid);
+	hid_cease_io(usbhid);
+
+	if (udev->auto_pm && test_bit(HID_KEYS_PRESSED, &usbhid->iofl)) {
+		/* lost race against keypresses */
+		status = hid_start_in(hid);
+		if (status < 0)
+			hid_io_error(hid);
+		usbhid_mark_busy(usbhid);
+		return -EBUSY;
+	}
 	dev_dbg(&intf->dev, "suspend\n");
 	return 0;
 }
@@ -1078,32 +1330,33 @@ static int hid_resume(struct usb_interface *intf)
 	if (!test_bit(HID_STARTED, &usbhid->iofl))
 		return 0;
 
-	clear_bit(HID_SUSPENDED, &usbhid->iofl);
+	clear_bit(HID_REPORTED_IDLE, &usbhid->iofl);
+	usbhid_mark_busy(usbhid);
+
+	if (test_bit(HID_CLEAR_HALT, &usbhid->iofl) ||
+	    test_bit(HID_RESET_PENDING, &usbhid->iofl))
+		schedule_work(&usbhid->reset_work);
 	usbhid->retry_delay = 0;
 	status = hid_start_in(hid);
-	dev_dbg(&intf->dev, "resume status %d\n", status);
-	return status;
-}
+	if (status < 0)
+		hid_io_error(hid);
+	usbhid_restart_queues(usbhid);
 
-/* Treat USB reset pretty much the same as suspend/resume */
-static int hid_pre_reset(struct usb_interface *intf)
-{
-	/* FIXME: What if the interface is already suspended? */
-	hid_suspend(intf, PMSG_ON);
+	dev_dbg(&intf->dev, "resume status %d\n", status);
 	return 0;
 }
 
-/* Same routine used for post_reset and reset_resume */
-static int hid_post_reset(struct usb_interface *intf)
+static int hid_reset_resume(struct usb_interface *intf)
 {
-	struct usb_device *dev = interface_to_usbdev (intf);
-
-	hid_set_idle(dev, intf->cur_altsetting->desc.bInterfaceNumber, 0, 0);
-	/* FIXME: Any more reinitialization needed? */
+	struct hid_device *hid = usb_get_intfdata(intf);
+	struct usbhid_device *usbhid = hid->driver_data;
 
-	return hid_resume(intf);
+	clear_bit(HID_REPORTED_IDLE, &usbhid->iofl);
+	return hid_post_reset(intf);
 }
 
+#endif /* CONFIG_PM */
+
 static struct usb_device_id hid_usb_ids [] = {
 	{ .match_flags = USB_DEVICE_ID_MATCH_INT_CLASS,
 		.bInterfaceClass = USB_INTERFACE_CLASS_HID },
@@ -1116,9 +1369,11 @@ static struct usb_driver hid_driver = {
 	.name =		"usbhid",
 	.probe =	hid_probe,
 	.disconnect =	hid_disconnect,
+#ifdef CONFIG_PM
 	.suspend =	hid_suspend,
 	.resume =	hid_resume,
-	.reset_resume =	hid_post_reset,
+	.reset_resume =	hid_reset_resume,
+#endif
 	.pre_reset =	hid_pre_reset,
 	.post_reset =	hid_post_reset,
 	.id_table =	hid_usb_ids,
@@ -1137,7 +1392,11 @@ static struct hid_driver hid_usb_driver = {
 
 static int __init hid_init(void)
 {
-	int retval;
+	int retval = -ENOMEM;
+
+	resumption_waker = create_freezeable_workqueue("usbhid_resumer");
+	if (!resumption_waker)
+		goto no_queue;
 	retval = hid_register_driver(&hid_usb_driver);
 	if (retval)
 		goto hid_register_fail;
@@ -1161,6 +1420,8 @@ static int __init hid_init(void)
 usbhid_quirks_init_fail:
 	hid_unregister_driver(&hid_usb_driver);
 hid_register_fail:
+	destroy_workqueue(resumption_waker);
+no_queue:
 	return retval;
 }
 
@@ -1170,6 +1431,7 @@ static void __exit hid_exit(void)
 	hiddev_exit();
 	usbhid_quirks_exit();
 	hid_unregister_driver(&hid_usb_driver);
+	destroy_workqueue(resumption_waker);
 }
 
 module_init(hid_init);

drivers/hid/usbhid/hiddev.c

@@ -246,11 +246,13 @@ static int hiddev_release(struct inode * inode, struct file * file)
 	spin_unlock_irqrestore(&list->hiddev->list_lock, flags);
 
 	if (!--list->hiddev->open) {
-		if (list->hiddev->exist)
+		if (list->hiddev->exist) {
 			usbhid_close(list->hiddev->hid);
-		else
+			usbhid_put_power(list->hiddev->hid);
+		} else {
 			kfree(list->hiddev);
 		}
+	}
 
 	kfree(list);
 
@@ -300,6 +302,17 @@ static int hiddev_open(struct inode *inode, struct file *file)
 	list_add_tail(&list->node, &hiddev_table[i]->list);
 	spin_unlock_irq(&list->hiddev->list_lock);
 
+	if (!list->hiddev->open++)
+		if (list->hiddev->exist) {
+			struct hid_device *hid = hiddev_table[i]->hid;
+			res = usbhid_get_power(hid);
+			if (res < 0) {
+				res = -EIO;
+				goto bail;
+			}
+			usbhid_open(hid);
+		}
+
 	return 0;
 bail:
 	file->private_data = NULL;

drivers/hid/usbhid/usbhid.h

@@ -38,7 +38,10 @@ int usbhid_wait_io(struct hid_device* hid);
 void usbhid_close(struct hid_device *hid);
 int usbhid_open(struct hid_device *hid);
 void usbhid_init_reports(struct hid_device *hid);
-void usbhid_submit_report(struct hid_device *hid, struct hid_report *report, unsigned char dir);
+void usbhid_submit_report
+(struct hid_device *hid, struct hid_report *report, unsigned char dir);
+int usbhid_get_power(struct hid_device *hid);
+void usbhid_put_power(struct hid_device *hid);
 
 /* iofl flags */
 #define HID_CTRL_RUNNING	1
@@ -49,6 +52,9 @@ void usbhid_submit_report(struct hid_device *hid, struct hid_report *report, uns
 #define HID_CLEAR_HALT		6
 #define HID_DISCONNECTED	7
 #define HID_STARTED		8
+#define HID_REPORTED_IDLE	9
+#define HID_KEYS_PRESSED	10
+#define HID_LED_ON		11
 
 /*
  * USB-specific HID struct, to be pointed to
@@ -66,7 +72,6 @@ struct usbhid_device {
 	struct urb *urbin;                                              /* Input URB */
 	char *inbuf;                                                    /* Input buffer */
 	dma_addr_t inbuf_dma;                                           /* Input buffer dma */
-	spinlock_t inlock;                                              /* Input fifo spinlock */
 
 	struct urb *urbctrl;                                            /* Control URB */
 	struct usb_ctrlrequest *cr;                                     /* Control request struct */
@@ -75,21 +80,22 @@ struct usbhid_device {
 	unsigned char ctrlhead, ctrltail;                               /* Control fifo head & tail */
 	char *ctrlbuf;                                                  /* Control buffer */
 	dma_addr_t ctrlbuf_dma;                                         /* Control buffer dma */
-	spinlock_t ctrllock;                                            /* Control fifo spinlock */
 
 	struct urb *urbout;                                             /* Output URB */
 	struct hid_output_fifo out[HID_CONTROL_FIFO_SIZE];              /* Output pipe fifo */
 	unsigned char outhead, outtail;                                 /* Output pipe fifo head & tail */
 	char *outbuf;                                                   /* Output buffer */
 	dma_addr_t outbuf_dma;                                          /* Output buffer dma */
-	spinlock_t outlock;                                             /* Output fifo spinlock */
 
+	spinlock_t lock;						/* fifo spinlock */
 	unsigned long iofl;                                             /* I/O flags (CTRL_RUNNING, OUT_RUNNING) */
 	struct timer_list io_retry;                                     /* Retry timer */
 	unsigned long stop_retry;                                       /* Time to give up, in jiffies */
 	unsigned int retry_delay;                                       /* Delay length in ms */
 	struct work_struct reset_work;                                  /* Task context for resets */
+	struct work_struct restart_work;				/* waking up for output to be done in a task */
 	wait_queue_head_t wait;						/* For sleeping */
+	int ledcount;							/* counting the number of active leds */
 };
 
 #define	hid_to_usb_dev(hid_dev) \

include/linux/hid.h

@@ -604,12 +604,17 @@ struct hid_ll_driver {
 	int (*open)(struct hid_device *hdev);
 	void (*close)(struct hid_device *hdev);
 
+	int (*power)(struct hid_device *hdev, int level);
+
 	int (*hidinput_input_event) (struct input_dev *idev, unsigned int type,
 			unsigned int code, int value);
 
 	int (*parse)(struct hid_device *hdev);
 };
 
+#define	PM_HINT_FULLON	1<<5
+#define PM_HINT_NORMAL	1<<1
+
 /* Applications from HID Usage Tables 4/8/99 Version 1.1 */
 /* We ignore a few input applications that are not widely used */
 #define IS_INPUT_APPLICATION(a) (((a >= 0x00010000) && (a <= 0x00010008)) || (a == 0x00010080) || (a == 0x000c0001) || (a == 0x000d0002))
@@ -642,6 +647,7 @@ int hidinput_find_field(struct hid_device *hid, unsigned int type, unsigned int
 void hid_output_report(struct hid_report *report, __u8 *data);
 struct hid_device *hid_allocate_device(void);
 int hid_parse_report(struct hid_device *hid, __u8 *start, unsigned size);
+int hid_check_keys_pressed(struct hid_device *hid);
 int hid_connect(struct hid_device *hid, unsigned int connect_mask);
 
 /**