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authorRafael J. Wysocki <rjw@sisk.pl>2010-02-08 19:18:16 +0100
committerRafael J. Wysocki <rjw@sisk.pl>2010-02-26 20:39:12 +0100
commit927bc9165d3cd01054b472f9b25d91a8707209c8 (patch)
treece0278e5f7acd62da2c3c7e66b205c8542cb0f62 /drivers/usb/core/endpoint.c
parent6d19c009cc780c63de25a046509ebc9473809fd6 (diff)
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>
Diffstat (limited to 'drivers/usb/core/endpoint.c')
-rw-r--r--drivers/usb/core/endpoint.c1
1 files changed, 1 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)