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HID: usbhid: base runtime PM on modern API

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

Signed-off-by: Oliver Neukum <oneukum@suse.de>
Tested-by: Maulik Mankad <x0082077@ti.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
This commit is contained in:
Oliver Neukum 2010-12-22 15:33:40 +01:00 committed by Jiri Kosina
parent 1874542d95
commit 68229689b6
2 changed files with 19 additions and 39 deletions
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57
drivers/hid/usbhid/hid-core.c
View File

@ -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 @@ usb_register_fail:
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);

1
drivers/hid/usbhid/usbhid.h
View File

@ -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 */
};