--- 1.75/drivers/usb/host/ehci-hcd.c	Wed Apr 14 20:20:58 2004
+++ edited/drivers/usb/host/ehci-hcd.c	Fri Apr 16 11:03:50 2004
@@ -592,7 +592,8 @@
 
 	/* root hub is shut down separately (first, when possible) */
 	spin_lock_irq (&ehci->lock);
-	ehci_work (ehci, NULL);
+	if (ehci->async)
+		ehci_work (ehci, NULL);
 	spin_unlock_irq (&ehci->lock);
 	ehci_mem_cleanup (ehci);