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USB: fix autosuspend when CONFIG_PM isn't set

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This patch (as791b) fixes things up to avoid compiler warnings or
errors when CONFIG_USB_SUSPEND or CONFIG_PM isn't set.

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 2006-09-26 14:50:20 -04:00 committed by Greg Kroah-Hartman
parent 8d1a243ba5
commit e0318ebff4
5 changed files with 43 additions and 27 deletions
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42
drivers/usb/core/driver.c
View file

@ -303,11 +303,11 @@ int usb_driver_claim_interface(struct usb_driver *driver,
dev->driver = &driver->drvwrap.driver;
usb_set_intfdata(iface, priv);
mutex_lock_nested(&udev->pm_mutex, udev->level);
usb_pm_lock(udev);
iface->condition = USB_INTERFACE_BOUND;
mark_active(iface);
iface->pm_usage_cnt = !(driver->supports_autosuspend);
mutex_unlock(&udev->pm_mutex);
usb_pm_unlock(udev);
/* if interface was already added, bind now; else let
* the future device_add() bind it, bypassing probe()
@ -356,11 +356,11 @@ void usb_driver_release_interface(struct usb_driver *driver,
dev->driver = NULL;
usb_set_intfdata(iface, NULL);
mutex_lock_nested(&udev->pm_mutex, udev->level);
usb_pm_lock(udev);
iface->condition = USB_INTERFACE_UNBOUND;
mark_quiesced(iface);
iface->needs_remote_wakeup = 0;
mutex_unlock(&udev->pm_mutex);
usb_pm_unlock(udev);
}
EXPORT_SYMBOL(usb_driver_release_interface);
@ -789,7 +789,7 @@ EXPORT_SYMBOL_GPL_FUTURE(usb_deregister);
#ifdef CONFIG_PM
/* Caller has locked udev->pm_mutex */
/* Caller has locked udev's pm_mutex */
static int suspend_device(struct usb_device *udev, pm_message_t msg)
{
struct usb_device_driver *udriver;
@ -816,7 +816,7 @@ static int suspend_device(struct usb_device *udev, pm_message_t msg)
return status;
}
/* Caller has locked udev->pm_mutex */
/* Caller has locked udev's pm_mutex */
static int resume_device(struct usb_device *udev)
{
struct usb_device_driver *udriver;
@ -842,7 +842,7 @@ static int resume_device(struct usb_device *udev)
return status;
}
/* Caller has locked intf's usb_device's pm_mutex */
/* Caller has locked intf's usb_device's pm mutex */
static int suspend_interface(struct usb_interface *intf, pm_message_t msg)
{
struct usb_driver *driver;
@ -1064,7 +1064,7 @@ int usb_resume_both(struct usb_device *udev)
/* Propagate the resume up the tree, if necessary */
if (udev->state == USB_STATE_SUSPENDED) {
if (parent) {
mutex_lock_nested(&parent->pm_mutex, parent->level);
usb_pm_lock(parent);
parent->auto_pm = 1;
status = usb_resume_both(parent);
} else {
@ -1079,7 +1079,7 @@ int usb_resume_both(struct usb_device *udev)
if (status == 0)
status = resume_device(udev);
if (parent)
mutex_unlock(&parent->pm_mutex);
usb_pm_unlock(parent);
} else {
/* Needed only for setting udev->dev.power.power_state.event
@ -1129,12 +1129,12 @@ int usb_resume_both(struct usb_device *udev)
*/
void usb_autosuspend_device(struct usb_device *udev, int dec_usage_cnt)
{
mutex_lock_nested(&udev->pm_mutex, udev->level);
usb_pm_lock(udev);
udev->pm_usage_cnt -= dec_usage_cnt;
if (udev->pm_usage_cnt <= 0)
queue_delayed_work(ksuspend_usb_wq, &udev->autosuspend,
USB_AUTOSUSPEND_DELAY);
mutex_unlock(&udev->pm_mutex);
usb_pm_unlock(udev);
// dev_dbg(&udev->dev, "%s: cnt %d\n",
// __FUNCTION__, udev->pm_usage_cnt);
}
@ -1168,13 +1168,13 @@ int usb_autoresume_device(struct usb_device *udev, int inc_usage_cnt)
{
int status;
mutex_lock_nested(&udev->pm_mutex, udev->level);
usb_pm_lock(udev);
udev->pm_usage_cnt += inc_usage_cnt;
udev->auto_pm = 1;
status = usb_resume_both(udev);
if (status != 0)
udev->pm_usage_cnt -= inc_usage_cnt;
mutex_unlock(&udev->pm_mutex);
usb_pm_unlock(udev);
// dev_dbg(&udev->dev, "%s: status %d cnt %d\n",
// __FUNCTION__, status, udev->pm_usage_cnt);
return status;
@ -1215,13 +1215,13 @@ void usb_autopm_put_interface(struct usb_interface *intf)
{
struct usb_device *udev = interface_to_usbdev(intf);
mutex_lock_nested(&udev->pm_mutex, udev->level);
usb_pm_lock(udev);
if (intf->condition != USB_INTERFACE_UNBOUND &&
--intf->pm_usage_cnt <= 0) {
queue_delayed_work(ksuspend_usb_wq, &udev->autosuspend,
USB_AUTOSUSPEND_DELAY);
}
mutex_unlock(&udev->pm_mutex);
usb_pm_unlock(udev);
// dev_dbg(&intf->dev, "%s: cnt %d\n",
// __FUNCTION__, intf->pm_usage_cnt);
}
@ -1263,7 +1263,7 @@ int usb_autopm_get_interface(struct usb_interface *intf)
struct usb_device *udev = interface_to_usbdev(intf);
int status;
mutex_lock_nested(&udev->pm_mutex, udev->level);
usb_pm_lock(udev);
if (intf->condition == USB_INTERFACE_UNBOUND)
status = -ENODEV;
else {
@ -1273,7 +1273,7 @@ int usb_autopm_get_interface(struct usb_interface *intf)
if (status != 0)
--intf->pm_usage_cnt;
}
mutex_unlock(&udev->pm_mutex);
usb_pm_unlock(udev);
// dev_dbg(&intf->dev, "%s: status %d cnt %d\n",
// __FUNCTION__, status, intf->pm_usage_cnt);
return status;
@ -1289,10 +1289,10 @@ static int usb_suspend(struct device *dev, pm_message_t message)
if (is_usb_device(dev)) {
struct usb_device *udev = to_usb_device(dev);
mutex_lock_nested(&udev->pm_mutex, udev->level);
usb_pm_lock(udev);
udev->auto_pm = 0;
status = usb_suspend_both(udev, message);
mutex_unlock(&udev->pm_mutex);
usb_pm_unlock(udev);
} else
status = 0;
return status;
@ -1305,10 +1305,10 @@ static int usb_resume(struct device *dev)
if (is_usb_device(dev)) {
struct usb_device *udev = to_usb_device(dev);
mutex_lock_nested(&udev->pm_mutex, udev->level);
usb_pm_lock(udev);
udev->auto_pm = 0;
status = usb_resume_both(udev);
mutex_unlock(&udev->pm_mutex);
usb_pm_unlock(udev);
/* Rebind drivers that had no suspend method? */
} else

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

@ -1779,7 +1779,7 @@ static int remote_wakeup(struct usb_device *udev)
* to the parent hub! */
usb_lock_device(udev);
mutex_lock_nested(&udev->pm_mutex, udev->level);
usb_pm_lock(udev);
if (udev->state == USB_STATE_SUSPENDED) {
dev_dbg(&udev->dev, "usb %sresume\n", "wakeup-");
/* TRSMRCY = 10 msec */
@ -1788,7 +1788,7 @@ static int remote_wakeup(struct usb_device *udev)
if (status == 0)
udev->dev.power.power_state.event = PM_EVENT_ON;
}
mutex_unlock(&udev->pm_mutex);
usb_pm_unlock(udev);
if (status == 0)
usb_autoresume_device(udev, 0);

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

@ -214,10 +214,10 @@ static void usb_autosuspend_work(void *_udev)
{
struct usb_device *udev = _udev;
mutex_lock_nested(&udev->pm_mutex, udev->level);
usb_pm_lock(udev);
udev->auto_pm = 1;
usb_suspend_both(udev, PMSG_SUSPEND);
mutex_unlock(&udev->pm_mutex);
usb_pm_unlock(udev);
}
#else

18
drivers/usb/core/usb.h
View file

@ -36,6 +36,16 @@ extern int usb_resume_both(struct usb_device *udev);
extern int usb_port_suspend(struct usb_device *dev);
extern int usb_port_resume(struct usb_device *dev);
static inline void usb_pm_lock(struct usb_device *udev)
{
mutex_lock_nested(&udev->pm_mutex, udev->level);
}
static inline void usb_pm_unlock(struct usb_device *udev)
{
mutex_unlock(&udev->pm_mutex);
}
#else
#define usb_suspend_both(udev, msg) 0
@ -45,6 +55,8 @@ static inline int usb_resume_both(struct usb_device *udev)
}
#define usb_port_suspend(dev) 0
#define usb_port_resume(dev) 0
static inline void usb_pm_lock(struct usb_device *udev) {}
static inline void usb_pm_unlock(struct usb_device *udev) {}
#endif
@ -58,7 +70,11 @@ extern int usb_autoresume_device(struct usb_device *udev, int inc_busy_cnt);
#else
#define usb_autosuspend_device(udev, dec_busy_cnt) do {} while (0)
#define usb_autoresume_device(udev, inc_busy_cnt) 0
static inline int usb_autoresume_device(struct usb_device *udev,
int inc_busy_cnt)
{
return 0;
}
#endif

2
include/linux/usb.h
View file

@ -380,10 +380,10 @@ struct usb_device {
int maxchild; /* Number of ports if hub */
struct usb_device *children[USB_MAXCHILDREN];
int pm_usage_cnt; /* usage counter for autosuspend */
#ifdef CONFIG_PM
struct work_struct autosuspend; /* for delayed autosuspends */
struct mutex pm_mutex; /* protects PM operations */
int pm_usage_cnt; /* usage counter for autosuspend */
unsigned auto_pm:1; /* autosuspend/resume in progress */
unsigned do_remote_wakeup:1; /* remote wakeup should be enabled */