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USB: don't propagate FREEZE or PRETHAW suspends 

This patch (as992) fixes a recently-added bug.  During a FREEZE or
PRETHAW suspend notification, non-root devices don't actually get
suspended.  So we shouldn't tell their parent hubs that they did.

(This code path used to be skipped over, until the FREEZE/PRETHAW test
got moved out of usb_suspend_both() into generic_suspend().)

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 2007-09-20 12:37:50 -04:00 committed by Greg Kroah-Hartman
parent 393e5511a5
commit 7108f28465
1 changed files with 6 additions and 1 deletions
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7
drivers/usb/core/driver.c
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@ -1112,7 +1112,12 @@ static int usb_suspend_both(struct usb_device *udev, pm_message_t msg)
usb_hcd_flush_endpoint(udev, udev->ep_out[i]);
usb_hcd_flush_endpoint(udev, udev->ep_in[i]);
}
if (parent)
/* If this is just a FREEZE or a PRETHAW, udev might
* not really be suspended. Only true suspends get
* propagated up the device tree.
*/
if (parent && udev->state == USB_STATE_SUSPENDED)
usb_autosuspend_device(parent);
}