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authorAlan Stern <stern@rowland.harvard.edu>2008-11-12 16:19:49 -0500
committerGreg Kroah-Hartman <gregkh@suse.de>2009-01-07 09:59:53 -0800
commit9ac39f28b5237a629e41ccfc1f73d3a55723045c (patch)
treec161d5b62d11b6e73605a37b2562b90fff689d9e /include
parentd4f373e57d3916814110968c5ea1155a8d972b5a (diff)
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USB: add asynchronous autosuspend/autoresume support
This patch (as1160b) adds support routines for asynchronous autosuspend and autoresume, with accompanying documentation updates. There already are several potential users of this interface, and others are likely to arise as autosuspend support becomes more widespread. Signed-off-by: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'include')
-rw-r--r--include/linux/usb.h9
1 files changed, 9 insertions, 0 deletions
diff --git a/include/linux/usb.h b/include/linux/usb.h
index f72aa51f7bc..859a88e6ce9 100644
--- a/include/linux/usb.h
+++ b/include/linux/usb.h
@@ -398,6 +398,7 @@ struct usb_tt;
* @urbnum: number of URBs submitted for the whole device
* @active_duration: total time device is not suspended
* @autosuspend: for delayed autosuspends
+ * @autoresume: for autoresumes requested while in_interrupt
* @pm_mutex: protects PM operations
* @last_busy: time of last use
* @autosuspend_delay: in jiffies
@@ -476,6 +477,7 @@ struct usb_device {
#ifdef CONFIG_PM
struct delayed_work autosuspend;
+ struct work_struct autoresume;
struct mutex pm_mutex;
unsigned long last_busy;
@@ -513,6 +515,8 @@ extern struct usb_device *usb_find_device(u16 vendor_id, u16 product_id);
extern int usb_autopm_set_interface(struct usb_interface *intf);
extern int usb_autopm_get_interface(struct usb_interface *intf);
extern void usb_autopm_put_interface(struct usb_interface *intf);
+extern int usb_autopm_get_interface_async(struct usb_interface *intf);
+extern void usb_autopm_put_interface_async(struct usb_interface *intf);
static inline void usb_autopm_enable(struct usb_interface *intf)
{
@@ -539,8 +543,13 @@ static inline int usb_autopm_set_interface(struct usb_interface *intf)
static inline int usb_autopm_get_interface(struct usb_interface *intf)
{ return 0; }
+static inline int usb_autopm_get_interface_async(struct usb_interface *intf)
+{ return 0; }
+
static inline void usb_autopm_put_interface(struct usb_interface *intf)
{ }
+static inline void usb_autopm_put_interface_async(struct usb_interface *intf)
+{ }
static inline void usb_autopm_enable(struct usb_interface *intf)
{ }
static inline void usb_autopm_disable(struct usb_interface *intf)