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authorAlan Stern <stern@rowland.harvard.edu>2006-07-01 22:11:02 -0400
committerGreg Kroah-Hartman <gregkh@suse.de>2006-09-27 11:58:50 -0700
commita8e7c5653562f88c0f5f53eac0a890c012655789 (patch)
treeba227138d408fdc73ccfc62ad8f75d912ece4baf /drivers/usb/core/generic.c
parent1cc8a25d5b680ff656927ffa9b66fae6b415b1d3 (diff)
usbcore: resume device resume recursion
This patch (as717b) removes the existing recursion in hub resume code: Resuming a hub will no longer automatically resume the devices attached to the hub. At the same time, it adds one level of recursion: Suspending a USB device will automatically suspend all the device's interfaces. Failure at an intermediate stage will cause all the already-suspended interfaces to be resumed. Attempts to suspend or resume an interface by itself will do nothing, although they won't return an error. Thus the regular system-suspend and system-resume procedures should continue to work as before; only runtime PM will be affected. The patch also removes the code that tests state of the interfaces before suspending a device. It's no longer needed, since everything gets suspended together. Signed-off-by: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/usb/core/generic.c')
-rw-r--r--drivers/usb/core/generic.c14
1 files changed, 0 insertions, 14 deletions
diff --git a/drivers/usb/core/generic.c b/drivers/usb/core/generic.c
index 1522195de71..b6dacd7551d 100644
--- a/drivers/usb/core/generic.c
+++ b/drivers/usb/core/generic.c
@@ -184,22 +184,8 @@ static void generic_disconnect(struct usb_device *udev)
#ifdef CONFIG_PM
-static int verify_suspended(struct device *dev, void *unused)
-{
- if (dev->driver == NULL)
- return 0;
- return (dev->power.power_state.event == PM_EVENT_ON) ? -EBUSY : 0;
-}
-
static int generic_suspend(struct usb_device *udev, pm_message_t msg)
{
- int status;
-
- /* rule out bogus requests through sysfs */
- status = device_for_each_child(&udev->dev, NULL, verify_suspended);
- if (status)
- return status;
-
/* USB devices enter SUSPEND state through their hubs, but can be
* marked for FREEZE as soon as their children are already idled.
* But those semantics are useless, so we equate the two (sigh).