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USB: add asynchronous autosuspend/autoresume support

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This patch (as1160b) adds support routines for asynchronous autosuspend
and autoresume, with accompanying documentation updates.  There
already are several potential users of this interface, and others are
likely to arise as autosuspend support becomes more widespread.

Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Alan Stern
2008-11-12 16:19:49 -05:00
committed by Greg Kroah-Hartman
parent d4f373e57d
commit 9ac39f28b5
6 changed files with 117 additions and 7 deletions
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1
drivers/usb/core/usb.c
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@@ -402,6 +402,7 @@ struct usb_device *usb_alloc_dev(struct usb_device *parent,
#ifdef CONFIG_PM
mutex_init(&dev->pm_mutex);
INIT_DELAYED_WORK(&dev->autosuspend, usb_autosuspend_work);
INIT_WORK(&dev->autoresume, usb_autoresume_work);
dev->autosuspend_delay = usb_autosuspend_delay * HZ;
dev->connect_time = jiffies;
dev->active_duration = -jiffies;