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usbcore: non-hub-specific uses of autosuspend

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This patch (as741) makes the non-hub parts of usbcore actually use the
autosuspend facilities added by an earlier patch.

	Devices opened through usbfs are autoresumed and then
	autosuspended upon close.

	Likewise for usb-skeleton.

	Devices are autoresumed for usb_set_configuration.


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
2006-08-30 15:47:18 -04:00
committed by Greg Kroah-Hartman
parent 645daaab0b
commit 01d883d44a
4 changed files with 28 additions and 11 deletions
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11
drivers/usb/usb-skeleton.c
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@@ -90,6 +90,11 @@ static int skel_open(struct inode *inode, struct file *file)
goto exit;
}
/* prevent the device from being autosuspended */
retval = usb_autopm_get_interface(interface);
if (retval)
goto exit;
/* increment our usage count for the device */
kref_get(&dev->kref);
@@ -108,6 +113,12 @@ static int skel_release(struct inode *inode, struct file *file)
if (dev == NULL)
return -ENODEV;
/* allow the device to be autosuspended */
mutex_lock(&dev->io_mutex);
if (dev->interface)
usb_autopm_put_interface(dev->interface);
mutex_unlock(&dev->io_mutex);
/* decrement the count on our device */
kref_put(&dev->kref, skel_delete);
return 0;