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USB: Add new PM callback methods for USB

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This patch (as1129) adds support for the new PM callbacks to usbcore.
The new callbacks merely invoke the same old USB power management
routines as the old ones did.

A minor improvement is that the callbacks are present only in the
"USB-device" device_type structure, rather than in the bus_type
structure.  This way they will be invoked only for USB devices, not
for USB interfaces.  The core USB PM routines automatically handle
suspending and resuming interfaces along with their devices.

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
2008-08-12 14:34:10 -04:00
committed by Greg Kroah-Hartman
parent 55151d7dab
commit f2189c477c
3 changed files with 72 additions and 19 deletions
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3
drivers/usb/core/usb.h
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@ -41,6 +41,9 @@ extern void usb_host_cleanup(void);
#ifdef CONFIG_PM
extern int usb_suspend(struct device *dev, pm_message_t msg);
extern int usb_resume(struct device *dev);
extern void usb_autosuspend_work(struct work_struct *work);
extern int usb_port_suspend(struct usb_device *dev);
extern int usb_port_resume(struct usb_device *dev);