On Mon, 29 Jan 2001, Robert Siemer wrote:
>
> Further I always see '09' in the Configuration Space at Interrupt_Line
> (0x3c) for the 00:01.2 USB Controller. But 2.4.0 says:
> Interrupt: pin A routed to IRQ 12
> while 2.4.0-test9 states:
> Interrupt: pin A routed to IRQ 9
Ahhah!
I bet it's the code that goes through all PCI devices, and tries to find
devices that have the same "pirq" (aka "link") value in the tables.
How about this patch? I bet that you'll get a message about pirq table
conflicts. Does USB end up working afterwards?
Linus
----
--- v2.4.0/linux/arch/i386/kernel/pci-irq.c Wed Jan 3 20:45:26 2001
+++ linux/arch/i386/kernel/pci-irq.c Sun Jan 28 23:36:48 2001
@@ -462,18 +462,9 @@
irq = pirq & 0xf;
DBG(" -> hardcoded IRQ %d\n", irq);
msg = "Hardcoded";
- if (dev->irq && dev->irq != irq) {
- printk("IRQ routing conflict in pirq table! Try
'pci=autoirq'\n");
- return 0;
- }
} else if (r->get && (irq = r->get(pirq_router_dev, dev, pirq))) {
DBG(" -> got IRQ %d\n", irq);
msg = "Found";
- /* We refuse to override the dev->irq information. Give a warning! */
- if (dev->irq && dev->irq != irq) {
- printk("IRQ routing conflict in pirq table! Try
'pci=autoirq'\n");
- return 0;
- }
} else if (newirq && r->set && (dev->class >> 8) != PCI_CLASS_DISPLAY_VGA) {
DBG(" -> assigning IRQ %d", newirq);
if (r->set(pirq_router_dev, dev, pirq, newirq)) {
@@ -504,6 +495,11 @@
if (!info)
continue;
if (info->irq[pin].link == pirq) {
+ /* We refuse to override the dev->irq information. Give a
+warning! */
+ if (dev2->irq && dev2->irq != irq) {
+ printk("IRQ routing conflict in pirq table for device
+%s\n", dev2->slot_name);
+ continue;
+ }
dev2->irq = irq;
pirq_penalty[irq]++;
if (dev != dev2)
-
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