Commit ef7f6c70 authored by Alan Stern's avatar Alan Stern Committed by Greg Kroah-Hartman

USB: more autosuspend timer stuff

This patch (as879) ties up some loose ends from an earlier patch.
These are things I didn't think to include at the time but which
clearly belonged there.

	If an autosuspend fails because driver activity races with
	the autosuspend call, restart the autosuspend timer.

	When a device is resumed by an external request, it counts
	as device activity and should update the last_busy time so
	that the next autoresume won't occur immediately.
Signed-off-by: default avatarAlan Stern <stern@rowland.harvard.edu>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
parent 4fe5354f
......@@ -983,7 +983,10 @@ static int autosuspend_check(struct usb_device *udev)
#else
#define autosuspend_check(udev) 0
static inline int autosuspend_check(struct usb_device *udev)
{
return 0;
}
#endif /* CONFIG_USB_SUSPEND */
......@@ -1041,7 +1044,6 @@ static int usb_suspend_both(struct usb_device *udev, pm_message_t msg)
if (status < 0)
goto done;
}
cancel_delayed_work(&udev->autosuspend);
/* Suspend all the interfaces and then udev itself */
if (udev->actconfig) {
......@@ -1062,9 +1064,16 @@ static int usb_suspend_both(struct usb_device *udev, pm_message_t msg)
usb_resume_interface(intf);
}
/* Try another autosuspend when the interfaces aren't busy */
if (udev->auto_pm)
autosuspend_check(udev);
/* If the suspend succeeded, propagate it up the tree */
} else if (parent)
usb_autosuspend_device(parent);
} else {
cancel_delayed_work(&udev->autosuspend);
if (parent)
usb_autosuspend_device(parent);
}
done:
// dev_dbg(&udev->dev, "%s: status %d\n", __FUNCTION__, status);
......@@ -1475,6 +1484,7 @@ int usb_external_resume_device(struct usb_device *udev)
usb_pm_lock(udev);
udev->auto_pm = 0;
status = usb_resume_both(udev);
udev->last_busy = jiffies;
usb_pm_unlock(udev);
/* Now that the device is awake, we can start trying to autosuspend
......
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