mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-11-18 23:54:26 +08:00
USB: rearrange functions in driver.c
This patch (as1328) reorders the functions in drivers/usb/core/driver.c so as to put all the routines dependent on CONFIG_PM in one place. 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
Greg Kroah-Hartman
parent
5899f1e020
commit
0c590e2361
@ -1413,6 +1413,109 @@ static int usb_resume_both(struct usb_device *udev, pm_message_t msg)
|
||||
return status;
|
||||
}
|
||||
|
||||
/**
|
||||
* usb_external_suspend_device - external suspend of a USB device and its interfaces
|
||||
* @udev: the usb_device to suspend
|
||||
* @msg: Power Management message describing this state transition
|
||||
*
|
||||
* This routine handles external suspend requests: ones not generated
|
||||
* internally by a USB driver (autosuspend) but rather coming from the user
|
||||
* (via sysfs) or the PM core (system sleep). The suspend will be carried
|
||||
* out regardless of @udev's usage counter or those of its interfaces,
|
||||
* and regardless of whether or not remote wakeup is enabled. Of course,
|
||||
* interface drivers still have the option of failing the suspend (if
|
||||
* there are unsuspended children, for example).
|
||||
*
|
||||
* The caller must hold @udev's device lock.
|
||||
*/
|
||||
int usb_external_suspend_device(struct usb_device *udev, pm_message_t msg)
|
||||
{
|
||||
int status;
|
||||
|
||||
do_unbind_rebind(udev, DO_UNBIND);
|
||||
usb_pm_lock(udev);
|
||||
status = usb_suspend_both(udev, msg);
|
||||
usb_pm_unlock(udev);
|
||||
return status;
|
||||
}
|
||||
|
||||
/**
|
||||
* usb_external_resume_device - external resume of a USB device and its interfaces
|
||||
* @udev: the usb_device to resume
|
||||
* @msg: Power Management message describing this state transition
|
||||
*
|
||||
* This routine handles external resume requests: ones not generated
|
||||
* internally by a USB driver (autoresume) but rather coming from the user
|
||||
* (via sysfs), the PM core (system resume), or the device itself (remote
|
||||
* wakeup). @udev's usage counter is unaffected.
|
||||
*
|
||||
* The caller must hold @udev's device lock.
|
||||
*/
|
||||
int usb_external_resume_device(struct usb_device *udev, pm_message_t msg)
|
||||
{
|
||||
int status;
|
||||
|
||||
usb_pm_lock(udev);
|
||||
status = usb_resume_both(udev, msg);
|
||||
udev->last_busy = jiffies;
|
||||
usb_pm_unlock(udev);
|
||||
if (status == 0)
|
||||
do_unbind_rebind(udev, DO_REBIND);
|
||||
|
||||
/* Now that the device is awake, we can start trying to autosuspend
|
||||
* it again. */
|
||||
if (status == 0)
|
||||
usb_try_autosuspend_device(udev);
|
||||
return status;
|
||||
}
|
||||
|
||||
int usb_suspend(struct device *dev, pm_message_t msg)
|
||||
{
|
||||
struct usb_device *udev;
|
||||
|
||||
udev = to_usb_device(dev);
|
||||
|
||||
/* If udev is already suspended, we can skip this suspend and
|
||||
* we should also skip the upcoming system resume. High-speed
|
||||
* root hubs are an exception; they need to resume whenever the
|
||||
* system wakes up in order for USB-PERSIST port handover to work
|
||||
* properly.
|
||||
*/
|
||||
if (udev->state == USB_STATE_SUSPENDED) {
|
||||
if (udev->parent || udev->speed != USB_SPEED_HIGH)
|
||||
udev->skip_sys_resume = 1;
|
||||
return 0;
|
||||
}
|
||||
|
||||
udev->skip_sys_resume = 0;
|
||||
return usb_external_suspend_device(udev, msg);
|
||||
}
|
||||
|
||||
int usb_resume(struct device *dev, pm_message_t msg)
|
||||
{
|
||||
struct usb_device *udev;
|
||||
int status;
|
||||
|
||||
udev = to_usb_device(dev);
|
||||
|
||||
/* If udev->skip_sys_resume is set then udev was already suspended
|
||||
* when the system sleep started, so we don't want to resume it
|
||||
* during this system wakeup.
|
||||
*/
|
||||
if (udev->skip_sys_resume)
|
||||
return 0;
|
||||
status = usb_external_resume_device(udev, msg);
|
||||
|
||||
/* Avoid PM error messages for devices disconnected while suspended
|
||||
* as we'll display regular disconnect messages just a bit later.
|
||||
*/
|
||||
if (status == -ENODEV)
|
||||
return 0;
|
||||
return status;
|
||||
}
|
||||
|
||||
#endif /* CONFIG_PM */
|
||||
|
||||
#ifdef CONFIG_USB_SUSPEND
|
||||
|
||||
/**
|
||||
@ -1784,109 +1887,6 @@ void usb_autoresume_work(struct work_struct *work)
|
||||
|
||||
#endif /* CONFIG_USB_SUSPEND */
|
||||
|
||||
/**
|
||||
* usb_external_suspend_device - external suspend of a USB device and its interfaces
|
||||
* @udev: the usb_device to suspend
|
||||
* @msg: Power Management message describing this state transition
|
||||
*
|
||||
* This routine handles external suspend requests: ones not generated
|
||||
* internally by a USB driver (autosuspend) but rather coming from the user
|
||||
* (via sysfs) or the PM core (system sleep). The suspend will be carried
|
||||
* out regardless of @udev's usage counter or those of its interfaces,
|
||||
* and regardless of whether or not remote wakeup is enabled. Of course,
|
||||
* interface drivers still have the option of failing the suspend (if
|
||||
* there are unsuspended children, for example).
|
||||
*
|
||||
* The caller must hold @udev's device lock.
|
||||
*/
|
||||
int usb_external_suspend_device(struct usb_device *udev, pm_message_t msg)
|
||||
{
|
||||
int status;
|
||||
|
||||
do_unbind_rebind(udev, DO_UNBIND);
|
||||
usb_pm_lock(udev);
|
||||
status = usb_suspend_both(udev, msg);
|
||||
usb_pm_unlock(udev);
|
||||
return status;
|
||||
}
|
||||
|
||||
/**
|
||||
* usb_external_resume_device - external resume of a USB device and its interfaces
|
||||
* @udev: the usb_device to resume
|
||||
* @msg: Power Management message describing this state transition
|
||||
*
|
||||
* This routine handles external resume requests: ones not generated
|
||||
* internally by a USB driver (autoresume) but rather coming from the user
|
||||
* (via sysfs), the PM core (system resume), or the device itself (remote
|
||||
* wakeup). @udev's usage counter is unaffected.
|
||||
*
|
||||
* The caller must hold @udev's device lock.
|
||||
*/
|
||||
int usb_external_resume_device(struct usb_device *udev, pm_message_t msg)
|
||||
{
|
||||
int status;
|
||||
|
||||
usb_pm_lock(udev);
|
||||
status = usb_resume_both(udev, msg);
|
||||
udev->last_busy = jiffies;
|
||||
usb_pm_unlock(udev);
|
||||
if (status == 0)
|
||||
do_unbind_rebind(udev, DO_REBIND);
|
||||
|
||||
/* Now that the device is awake, we can start trying to autosuspend
|
||||
* it again. */
|
||||
if (status == 0)
|
||||
usb_try_autosuspend_device(udev);
|
||||
return status;
|
||||
}
|
||||
|
||||
int usb_suspend(struct device *dev, pm_message_t msg)
|
||||
{
|
||||
struct usb_device *udev;
|
||||
|
||||
udev = to_usb_device(dev);
|
||||
|
||||
/* If udev is already suspended, we can skip this suspend and
|
||||
* we should also skip the upcoming system resume. High-speed
|
||||
* root hubs are an exception; they need to resume whenever the
|
||||
* system wakes up in order for USB-PERSIST port handover to work
|
||||
* properly.
|
||||
*/
|
||||
if (udev->state == USB_STATE_SUSPENDED) {
|
||||
if (udev->parent || udev->speed != USB_SPEED_HIGH)
|
||||
udev->skip_sys_resume = 1;
|
||||
return 0;
|
||||
}
|
||||
|
||||
udev->skip_sys_resume = 0;
|
||||
return usb_external_suspend_device(udev, msg);
|
||||
}
|
||||
|
||||
int usb_resume(struct device *dev, pm_message_t msg)
|
||||
{
|
||||
struct usb_device *udev;
|
||||
int status;
|
||||
|
||||
udev = to_usb_device(dev);
|
||||
|
||||
/* If udev->skip_sys_resume is set then udev was already suspended
|
||||
* when the system sleep started, so we don't want to resume it
|
||||
* during this system wakeup.
|
||||
*/
|
||||
if (udev->skip_sys_resume)
|
||||
return 0;
|
||||
status = usb_external_resume_device(udev, msg);
|
||||
|
||||
/* Avoid PM error messages for devices disconnected while suspended
|
||||
* as we'll display regular disconnect messages just a bit later.
|
||||
*/
|
||||
if (status == -ENODEV)
|
||||
return 0;
|
||||
return status;
|
||||
}
|
||||
|
||||
#endif /* CONFIG_PM */
|
||||
|
||||
struct bus_type usb_bus_type = {
|
||||
.name = "usb",
|
||||
.match = usb_device_match,
|
||||
|
||||
Loading…
Reference in New Issue
Block a user