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Commit 68229689 authored by Oliver Neukum's avatar Oliver Neukum Committed by Jiri Kosina
Browse files

HID: usbhid: base runtime PM on modern API 



This patch doesn't alter functionality, but removes a dedicated kernel
thread.

Signed-off-by: default avatarOliver Neukum <oneukum@suse.de>
Tested-by: default avatarMaulik Mankad <x0082077@ti.com>
Signed-off-by: default avatarJiri Kosina <jkosina@suse.cz>
parent 1874542d

drivers/hid/usbhid/hid-core.c

+19 −38
Original line number Diff line number Diff line
@@ -67,7 +67,6 @@ 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);
@@ -300,10 +299,19 @@ static int hid_submit_out(struct hid_device *hid) 
	struct hid_report *report;

	char *raw_report;

	struct usbhid_device *usbhid = hid->driver_data;

	int r;



	report = usbhid->out[usbhid->outtail].report;

	raw_report = usbhid->out[usbhid->outtail].raw_report;



	r = usb_autopm_get_interface_async(usbhid->intf);

	if (r < 0)

		return -1;



	/*

	 * if the device hasn't been woken, we leave the output

	 * to resume()

	 */

	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);
@@ -314,16 +322,10 @@ static int hid_submit_out(struct hid_device *hid) 


		if (usb_submit_urb(usbhid->urbout, GFP_ATOMIC)) {

			hid_err(hid, "usb_submit_urb(out) failed\n");

			usb_autopm_put_interface_async(usbhid->intf);

			return -1;

		}

		usbhid->last_out = jiffies;

	} 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;
@@ -334,13 +336,16 @@ static int hid_submit_ctrl(struct hid_device *hid) 
	struct hid_report *report;

	unsigned char dir;

	char *raw_report;

	int len;

	int len, r;

	struct usbhid_device *usbhid = hid->driver_data;



	report = usbhid->ctrl[usbhid->ctrltail].report;

	raw_report = usbhid->ctrl[usbhid->ctrltail].raw_report;

	dir = usbhid->ctrl[usbhid->ctrltail].dir;



	r = usb_autopm_get_interface_async(usbhid->intf);

	if (r < 0)

		return -1;

	if (!test_bit(HID_REPORTED_IDLE, &usbhid->iofl)) {

		len = ((report->size - 1) >> 3) + 1 + (report->id > 0);

		if (dir == USB_DIR_OUT) {
@@ -375,17 +380,11 @@ static int hid_submit_ctrl(struct hid_device *hid) 
			usbhid->cr->wValue, usbhid->cr->wIndex, usbhid->cr->wLength);



		if (usb_submit_urb(usbhid->urbctrl, GFP_ATOMIC)) {

			usb_autopm_put_interface_async(usbhid->intf);

			hid_err(hid, "usb_submit_urb(ctrl) failed\n");

			return -1;

		}

		usbhid->last_ctrl = jiffies;

	} 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;
@@ -435,6 +434,7 @@ static void hid_irq_out(struct urb *urb) 


	clear_bit(HID_OUT_RUNNING, &usbhid->iofl);

	spin_unlock_irqrestore(&usbhid->lock, flags);

	usb_autopm_put_interface_async(usbhid->intf);

	wake_up(&usbhid->wait);

}
@@ -480,11 +480,13 @@ static void hid_ctrl(struct urb *urb) 
			wake_up(&usbhid->wait);

		}

		spin_unlock(&usbhid->lock);

		usb_autopm_put_interface_async(usbhid->intf);

		return;

	}



	clear_bit(HID_CTRL_RUNNING, &usbhid->iofl);

	spin_unlock(&usbhid->lock);

	usb_autopm_put_interface_async(usbhid->intf);

	wake_up(&usbhid->wait);

}
@@ -655,7 +657,7 @@ int usbhid_open(struct hid_device *hid) 
	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 */

		/* the device must be awake to reliably request remote wakeup */

		if (res < 0) {

			hid->open--;

			mutex_unlock(&hid_open_mut);
@@ -856,18 +858,6 @@ static void usbhid_restart_queues(struct usbhid_device *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;
@@ -1204,7 +1194,6 @@ static int usbhid_probe(struct usb_interface *intf, const struct usb_device_id * 


	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->lock);
@@ -1239,7 +1228,6 @@ static void usbhid_disconnect(struct usb_interface *intf) 
static void hid_cancel_delayed_stuff(struct usbhid_device *usbhid)

{

	del_timer_sync(&usbhid->io_retry);

	cancel_work_sync(&usbhid->restart_work);

	cancel_work_sync(&usbhid->reset_work);

}
@@ -1260,7 +1248,6 @@ static int hid_pre_reset(struct usb_interface *intf) 
	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;
@@ -1459,9 +1446,6 @@ static int __init hid_init(void) 
{

	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;
@@ -1479,8 +1463,6 @@ 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;

}
@@ -1489,7 +1471,6 @@ static void __exit hid_exit(void) 
	usb_deregister(&hid_driver);

	usbhid_quirks_exit();

	hid_unregister_driver(&hid_usb_driver);

	destroy_workqueue(resumption_waker);

}



module_init(hid_init);

drivers/hid/usbhid/usbhid.h

+0 −1
Original line number Diff line number Diff line
@@ -95,7 +95,6 @@ struct usbhid_device { 
	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 */

};