Default to a interrupt router that returns an invalid interrupt.

Otherwise, busses that implement the pcib interface that forget to
implement pcib_route_interrupt would return EIO, which the caller
interprets as 'use interrupt 6'.  This is likely the cause of much of
the grief that we had when I enabled power modes for the cardbus
bridge, since the card needed to reroute the interrupt to it and it
was getting 6 which was d by the pccbb sanity checks.

1 files changed, 9 insertions, 1 deletions

diff --git a/sys/dev/pci/pcib_if.m b/sys/dev/pci/pcib_if.m
index c9f480e..92d7cd6 100644
--- a/sys/dev/pci/pcib_if.m
+++ b/sys/dev/pci/pcib_if.m
@@ -30,6 +30,14 @@
 
 INTERFACE pcib;
 
+CODE {
+	static int
+	null_route_interrupt(device_t pcib, device_t dev, int pin)
+	{
+		return (PCI_INVALID_IRQ);
+	}
+};
+
 #
 # Return the number of slots on the attached PCI bus.
 #
@@ -78,4 +86,4 @@ METHOD int route_interrupt {
 	device_t pcib;
 	device_t dev;
 	int pin;
-};
+} default null_route_interrupt;