--- usb-ohci.orig	Tue May  2 20:35:58 2000
+++ usb-ohci.c	Tue May  2 20:38:40 2000
@@ -1354,6 +1354,11 @@
 	__u8 data[8];
 
 	num_ports = readl (&ohci->regs->roothub.a) & RH_A_NDP; 
+	if (num_ports > MAX_ROOT_PORTS) {
+		info ("corrupted");
+		ohci->disabled = true;
+		BUG ();
+	}
 	*(__u8 *) data = (readl (&ohci->regs->roothub.status) & (RH_HS_LPSC | RH_HS_OCIC))
 		? 1: 0;
 	ret = *(__u8 *) data;