From 25dbf33c268e183cf9df85f6e601623b9993925d Mon Sep 17 00:00:00 2001
From: n_hibma <n_hibma@FreeBSD.org>
Date: Sun, 3 Oct 1999 20:23:25 +0000
Subject: Check for a valid irq number before calling BUS_SETUP_INTR.

Requested-By:	msmith
---
 sys/dev/usb/ohci_pci.c | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

(limited to 'sys/dev/usb/ohci_pci.c')

diff --git a/sys/dev/usb/ohci_pci.c b/sys/dev/usb/ohci_pci.c
index 28dff3e..6c90da4 100644
--- a/sys/dev/usb/ohci_pci.c
+++ b/sys/dev/usb/ohci_pci.c
@@ -56,7 +56,6 @@
 #include <sys/kernel.h>
 #include <sys/module.h>
 #include <sys/bus.h>
-#include <sys/device.h>
 #include <sys/proc.h>
 #include <sys/queue.h>
 #include <machine/bus.h>
@@ -145,6 +144,7 @@ ohci_pci_attach(device_t self)
 	int rid;
 	struct resource *res;
 	void *ih;
+	int intr;
 
 	rid = PCI_CBMEM;
 	res = bus_alloc_resource(self, SYS_RES_MEMORY, &rid,
@@ -200,6 +200,14 @@ ohci_pci_attach(device_t self)
 		sprintf(sc->sc_vendor, "(unknown)");
 	}
 
+	intr = pci_read_config(self, PCIR_INTLINE, 1);
+	if (intr == 0 || intr == 255) {
+		device_printf(self, "Invalid irq %d\n", intr);
+		device_printf(self, "Please switch on USB support and switch PNP-OS to 'No' in BIOS\n");
+		device_delete_child(self, usbus);
+		return ENXIO;
+	}
+
 	err = BUS_SETUP_INTR(parent, self, res, INTR_TYPE_BIO,
 			     (driver_intr_t *) ohci_intr, sc, &ih);
 	if (err) {
-- 
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