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| author | Rafael J. Wysocki <rjw@sisk.pl> | 2010-02-08 19:18:16 +0100 |
|---|---|---|
| committer | Rafael J. Wysocki <rjw@sisk.pl> | 2010-02-26 20:39:12 +0100 |
| commit | 927bc9165d3cd01054b472f9b25d91a8707209c8 (patch) | |
| tree | ce0278e5f7acd62da2c3c7e66b205c8542cb0f62 | |
| parent | 6d19c009cc780c63de25a046509ebc9473809fd6 (diff) | |
| download | linux-927bc9165d3cd01054b472f9b25d91a8707209c8.tar.gz | |
PM: Allow USB devices to suspend/resume asynchronously
Set power.async_suspend for USB devices, endpoints and interfaces, allowing them to be suspended and resumed asynchronously during system sleep transitions. The power.async_suspend flag is also set for devices that don't have suspend or resume callbacks, because otherwise they would make the main suspend/resume thread wait for their "asynchronous" children (during suspend) or parents (during resume), effectively negating the possible gains from executing these devices' suspend and resume callbacks asynchronously. Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
| -rw-r--r-- | drivers/usb/core/endpoint.c | 1 | ||||
| -rw-r--r-- | drivers/usb/core/hub.c | 1 | ||||
| -rw-r--r-- | drivers/usb/core/message.c | 1 |
3 files changed, 3 insertions, 0 deletions
diff --git a/drivers/usb/core/endpoint.c b/drivers/usb/core/endpoint.c index fdfaa7885515..d26b9ea981f9 100644 --- a/drivers/usb/core/endpoint.c +++ b/drivers/usb/core/endpoint.c @@ -186,6 +186,7 @@ int usb_create_ep_devs(struct device *parent, ep_dev->dev.parent = parent; ep_dev->dev.release = ep_device_release; dev_set_name(&ep_dev->dev, "ep_%02x", endpoint->desc.bEndpointAddress); + device_enable_async_suspend(&ep_dev->dev); retval = device_register(&ep_dev->dev); if (retval) diff --git a/drivers/usb/core/hub.c b/drivers/usb/core/hub.c index 35cc8b9ba1f5..20ecb4cec8de 100644 --- a/drivers/usb/core/hub.c +++ b/drivers/usb/core/hub.c @@ -1817,6 +1817,7 @@ int usb_new_device(struct usb_device *udev) /* Tell the world! */ announce_device(udev); + device_enable_async_suspend(&udev->dev); /* Register the device. The device driver is responsible * for configuring the device and invoking the add-device * notifier chain (used by usbfs and possibly others). diff --git a/drivers/usb/core/message.c b/drivers/usb/core/message.c index 9bc95fec793f..df73574a9cc9 100644 --- a/drivers/usb/core/message.c +++ b/drivers/usb/core/message.c @@ -1867,6 +1867,7 @@ free_interfaces: "adding %s (config #%d, interface %d)\n", dev_name(&intf->dev), configuration, intf->cur_altsetting->desc.bInterfaceNumber); + device_enable_async_suspend(&intf->dev); ret = device_add(&intf->dev); if (ret != 0) { dev_err(&dev->dev, "device_add(%s) --> %d\n", |