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>
diff --git a/drivers/usb/core/hcd-pci.c b/drivers/usb/core/hcd-pci.c
index 3fb9af8..4246742 100644
--- a/drivers/usb/core/hcd-pci.c
+++ b/drivers/usb/core/hcd-pci.c
@@ -250,6 +250,12 @@
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;