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USB: remove the auto_pm flag

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This patch (as1302) removes the auto_pm flag from struct usb_device.
The flag's only purpose was to distinguish between autosuspends and
external suspends, but that information is now available in the
pm_message_t argument passed to suspend methods.

Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Alan Stern 2009-11-13 11:53:59 -05:00 committed by Greg Kroah-Hartman
parent 576a362ad2
commit fb34d53752
8 changed files with 14 additions and 22 deletions
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9
Documentation/usb/power-management.txt
View file

@ -423,15 +423,16 @@ an URB had completed too recently.
External suspend calls should never be allowed to fail in this way,
only autosuspend calls. The driver can tell them apart by checking
udev->auto_pm; this flag will be set to 1 for internal PM events
(autosuspend or autoresume) and 0 for external PM events.
the PM_EVENT_AUTO bit in the message.event argument to the suspend
method; this bit will be set for internal PM events (autosuspend) and
clear for external PM events.
Many of the ingredients in the autosuspend framework are oriented
towards interfaces: The usb_interface structure contains the
pm_usage_cnt field, and the usb_autopm_* routines take an interface
pointer as their argument. But somewhat confusingly, a few of the
pieces (usb_mark_last_busy() and udev->auto_pm) use the usb_device
structure instead. Drivers need to keep this straight; they can call
pieces (i.e., usb_mark_last_busy()) use the usb_device structure
instead. Drivers need to keep this straight; they can call
interface_to_usbdev() to find the device structure for a given
interface.

2
drivers/bluetooth/btusb.c
View file

@ -1066,7 +1066,7 @@ static int btusb_suspend(struct usb_interface *intf, pm_message_t message)
return 0;
spin_lock_irq(&data->txlock);
if (!(interface_to_usbdev(intf)->auto_pm && data->tx_in_flight)) {
if (!((message.event & PM_EVENT_AUTO) && data->tx_in_flight)) {
set_bit(BTUSB_SUSPENDING, &data->flags);
spin_unlock_irq(&data->txlock);
} else {

8
drivers/hid/usbhid/hid-core.c
View file

@ -1253,10 +1253,9 @@ 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) {
if (message.event & PM_EVENT_AUTO) {
spin_lock_irq(&usbhid->lock); /* Sync with error handler */
if (!test_bit(HID_RESET_PENDING, &usbhid->iofl)
&& !test_bit(HID_CLEAR_HALT, &usbhid->iofl)
@ -1281,7 +1280,7 @@ static int hid_suspend(struct usb_interface *intf, pm_message_t message)
return -EIO;
}
if (!ignoreled && udev->auto_pm) {
if (!ignoreled && (message.event & PM_EVENT_AUTO)) {
spin_lock_irq(&usbhid->lock);
if (test_bit(HID_LED_ON, &usbhid->iofl)) {
spin_unlock_irq(&usbhid->lock);
@ -1294,7 +1293,8 @@ static int hid_suspend(struct usb_interface *intf, pm_message_t message)
hid_cancel_delayed_stuff(usbhid);
hid_cease_io(usbhid);
if (udev->auto_pm && test_bit(HID_KEYS_PRESSED, &usbhid->iofl)) {
if ((message.event & PM_EVENT_AUTO) &&
test_bit(HID_KEYS_PRESSED, &usbhid->iofl)) {
/* lost race against keypresses */
status = hid_start_in(hid);
if (status < 0)

7
drivers/net/wimax/i2400m/usb.c
View file

@ -579,7 +579,7 @@ void i2400mu_disconnect(struct usb_interface *iface)
*
* As well, the device might refuse going to sleep for whichever
* reason. In this case we just fail. For system suspend/hibernate,
* we *can't* fail. We look at usb_dev->auto_pm to see if the
* we *can't* fail. We check PM_EVENT_AUTO to see if the
* suspend call comes from the USB stack or from the system and act
* in consequence.
*
@ -591,14 +591,11 @@ int i2400mu_suspend(struct usb_interface *iface, pm_message_t pm_msg)
int result = 0;
struct device *dev = &iface->dev;
struct i2400mu *i2400mu = usb_get_intfdata(iface);
#ifdef CONFIG_PM
struct usb_device *usb_dev = i2400mu->usb_dev;
#endif
unsigned is_autosuspend = 0;
struct i2400m *i2400m = &i2400mu->i2400m;
#ifdef CONFIG_PM
if (usb_dev->auto_pm > 0)
if (pm_msg.event & PM_EVENT_AUTO)
is_autosuspend = 1;
#endif

4
drivers/usb/core/driver.c
View file

@ -1341,7 +1341,6 @@ static int usb_autopm_do_device(struct usb_device *udev, int inc_usage_cnt)
int status = 0;
usb_pm_lock(udev);
udev->auto_pm = 1;
udev->pm_usage_cnt += inc_usage_cnt;
WARN_ON(udev->pm_usage_cnt < 0);
if (inc_usage_cnt)
@ -1473,7 +1472,6 @@ static int usb_autopm_do_interface(struct usb_interface *intf,
if (intf->condition == USB_INTERFACE_UNBOUND)
status = -ENODEV;
else {
udev->auto_pm = 1;
atomic_add(inc_usage_cnt, &intf->pm_usage_cnt);
udev->last_busy = jiffies;
if (inc_usage_cnt >= 0 &&
@ -1707,7 +1705,6 @@ int usb_external_suspend_device(struct usb_device *udev, pm_message_t msg)
do_unbind_rebind(udev, DO_UNBIND);
usb_pm_lock(udev);
udev->auto_pm = 0;
status = usb_suspend_both(udev, msg);
usb_pm_unlock(udev);
return status;
@ -1730,7 +1727,6 @@ int usb_external_resume_device(struct usb_device *udev, pm_message_t msg)
int status;
usb_pm_lock(udev);
udev->auto_pm = 0;
status = usb_resume_both(udev, msg);
udev->last_busy = jiffies;
usb_pm_unlock(udev);

2
drivers/usb/serial/option.c
View file

@ -1313,7 +1313,7 @@ static int option_suspend(struct usb_serial *serial, pm_message_t message)
dbg("%s entered", __func__);
if (serial->dev->auto_pm) {
if (message.event & PM_EVENT_AUTO) {
spin_lock_irq(&intfdata->susp_lock);
b = intfdata->in_flight;
spin_unlock_irq(&intfdata->susp_lock);

2
drivers/usb/serial/sierra.c
View file

@ -1005,7 +1005,7 @@ static int sierra_suspend(struct usb_serial *serial, pm_message_t message)
struct sierra_intf_private *intfdata;
int b;
if (serial->dev->auto_pm) {
if (message.event & PM_EVENT_AUTO) {
intfdata = serial->private;
spin_lock_irq(&intfdata->susp_lock);
b = intfdata->in_flight;

2
include/linux/usb.h
View file

@ -429,7 +429,6 @@ struct usb_tt;
* @last_busy: time of last use
* @autosuspend_delay: in jiffies
* @connect_time: time device was first connected
* @auto_pm: autosuspend/resume in progress
* @do_remote_wakeup: remote wakeup should be enabled
* @reset_resume: needs reset instead of resume
* @autosuspend_disabled: autosuspend disabled by the user
@ -514,7 +513,6 @@ struct usb_device {
int autosuspend_delay;
unsigned long connect_time;
unsigned auto_pm:1;
unsigned do_remote_wakeup:1;
unsigned reset_resume:1;
unsigned autosuspend_disabled:1;