diff options
Diffstat (limited to 'drivers/usb')
| -rw-r--r-- | drivers/usb/core/hub.c | 64 | ||||
| -rw-r--r-- | drivers/usb/core/usb.h | 11 |
2 files changed, 57 insertions, 18 deletions
diff --git a/drivers/usb/core/hub.c b/drivers/usb/core/hub.c index a310c7cede9..64e80b964b8 100644 --- a/drivers/usb/core/hub.c +++ b/drivers/usb/core/hub.c @@ -1041,7 +1041,7 @@ void usb_set_device_state(struct usb_device *udev, } -#ifdef CONFIG_PM +#ifdef CONFIG_PM /** * usb_root_hub_lost_power - called by HCD if the root hub lost Vbus power @@ -1072,7 +1072,7 @@ void usb_root_hub_lost_power(struct usb_device *rhdev) } EXPORT_SYMBOL_GPL(usb_root_hub_lost_power); -#endif +#endif /* CONFIG_PM */ static void choose_address(struct usb_device *udev) { @@ -1471,6 +1471,7 @@ static void hub_port_logical_disconnect(struct usb_hub *hub, int port1) kick_khubd(hub); } +#ifdef CONFIG_PM #ifdef CONFIG_USB_SUSPEND @@ -1569,8 +1570,6 @@ static int __usb_port_suspend (struct usb_device *udev, int port1) return status; } -#endif - /* * usb_port_suspend - suspend a usb device's upstream port * @udev: device that's no longer in active use @@ -1593,11 +1592,7 @@ static int __usb_port_suspend (struct usb_device *udev, int port1) */ int usb_port_suspend(struct usb_device *udev) { -#ifdef CONFIG_USB_SUSPEND return __usb_port_suspend(udev, udev->portnum); -#else - return 0; -#endif } /* @@ -1661,8 +1656,6 @@ static int finish_port_resume(struct usb_device *udev) return status; } -#ifdef CONFIG_USB_SUSPEND - static int hub_port_resume(struct usb_hub *hub, int port1, struct usb_device *udev) { @@ -1722,8 +1715,6 @@ hub_port_resume(struct usb_hub *hub, int port1, struct usb_device *udev) return status; } -#endif - /* * usb_port_resume - re-activate a suspended usb device's upstream port * @udev: device to re-activate @@ -1739,17 +1730,15 @@ hub_port_resume(struct usb_hub *hub, int port1, struct usb_device *udev) */ int usb_port_resume(struct usb_device *udev) { - int status = 0; + int status; /* we change the device's upstream USB link, * but root hubs have no upstream USB link. */ if (udev->parent) { -#ifdef CONFIG_USB_SUSPEND // NOTE this fails if parent is also suspended... status = hub_port_resume(hdev_to_hub(udev->parent), udev->portnum, udev); -#endif } else status = finish_port_resume(udev); if (status < 0) @@ -1761,8 +1750,6 @@ static int remote_wakeup(struct usb_device *udev) { int status = 0; -#ifdef CONFIG_USB_SUSPEND - /* don't repeat RESUME sequence if this device * was already woken up by some other task */ @@ -1777,10 +1764,42 @@ static int remote_wakeup(struct usb_device *udev) if (status == 0) usb_resume_both(udev); usb_unlock_device(udev); -#endif return status; } +#else /* CONFIG_USB_SUSPEND */ + +/* When CONFIG_USB_SUSPEND isn't set, we never suspend or resume any ports. */ + +int usb_port_suspend(struct usb_device *udev) +{ + return 0; +} + +static inline int +finish_port_resume(struct usb_device *udev) +{ + return 0; +} + +static inline int +hub_port_resume(struct usb_hub *hub, int port1, struct usb_device *udev) +{ + return 0; +} + +int usb_port_resume(struct usb_device *udev) +{ + return 0; +} + +static inline int remote_wakeup(struct usb_device *udev) +{ + return 0; +} + +#endif + static int hub_suspend(struct usb_interface *intf, pm_message_t msg) { struct usb_hub *hub = usb_get_intfdata (intf); @@ -1854,6 +1873,15 @@ static int hub_resume(struct usb_interface *intf) return 0; } +#else /* CONFIG_PM */ + +static inline int remote_wakeup(struct usb_device *udev) +{ + return 0; +} + +#endif + void usb_suspend_root_hub(struct usb_device *hdev) { struct usb_hub *hub = hdev_to_hub(hdev); diff --git a/drivers/usb/core/usb.h b/drivers/usb/core/usb.h index 74df0db954c..98675fb1bc4 100644 --- a/drivers/usb/core/usb.h +++ b/drivers/usb/core/usb.h @@ -30,11 +30,22 @@ extern void usb_major_cleanup(void); extern int usb_host_init(void); extern void usb_host_cleanup(void); +#ifdef CONFIG_PM + extern int usb_suspend_both(struct usb_device *udev, pm_message_t msg); 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); +#else + +#define usb_suspend_both(udev, msg) 0 +#define usb_resume_both(udev) 0 +#define usb_port_suspend(dev) 0 +#define usb_port_resume(dev) 0 + +#endif + extern struct bus_type usb_bus_type; extern struct usb_device_driver usb_generic_driver; |