Commit 269954e5 authored Nov 19, 2007 by Alan Stern Committed by Greg Kroah-Hartman Feb 01, 2008

USB: don't change HC power state for a FREEZE



This patch (as1016) prevents PCI-based host controllers from
undergoing a power-state change during a FREEZE or a PRETHAW.  Such
changes are needed only during a SUSPEND.

Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
CC: David Brownell <david-b@pacbell.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

parent 4145ed6d

drivers/usb/core/hcd-pci.c

+6 −0

Original line number	Diff line number	Diff line
		@@ -250,6 +250,12 @@ int usb_hcd_pci_suspend (struct pci_dev *dev, pm_message_t message)
		pci_disable_device (dev);
		}

		if (message.event == PM_EVENT_FREEZE \|\|
		message.event == PM_EVENT_PRETHAW) {
		dev_dbg(hcd->self.controller, "--> no state change\n");
		goto done;
		}

		if (!has_pci_pm) {
		dev_dbg (hcd->self.controller, "--> PCI D0/legacy\n");
		goto done;