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Subject[PATCH] ACPI pci irq routing fix
If irq.active is set from _CRS, make sure to use it, rather than trying
anything from the from the _PRS list, as some machines don't handle this
properly. This patch is against current linux-acpi-test-2.6.0. It's
been floating about for a while, and fixes bug #1186.

Patch originally from Andrew de Quincey.

thanks,
-chris
--
Linux Security Modules http://lsm.immunix.org http://lsm.bkbits.net

===== drivers/acpi/pci_link.c 1.19 vs edited =====
--- 1.19/drivers/acpi/pci_link.c Thu Sep 18 11:29:36 2003
+++ edited/drivers/acpi/pci_link.c Fri Sep 26 14:36:15 2003
@@ -500,15 +500,15 @@
irq = link->irq.active;
} else {
irq = link->irq.possible[0];
- }

- /*
- * Select the best IRQ. This is done in reverse to promote
- * the use of IRQs 9, 10, 11, and >15.
- */
- for (i=(link->irq.possible_count-1); i>0; i--) {
- if (acpi_irq_penalty[irq] > acpi_irq_penalty[link->irq.possible[i]])
- irq = link->irq.possible[i];
+ /*
+ * Select the best IRQ. This is done in reverse to promote
+ * the use of IRQs 9, 10, 11, and >15.
+ */
+ for (i=(link->irq.possible_count-1); i>0; i--) {
+ if (acpi_irq_penalty[irq] > acpi_irq_penalty[link->irq.possible[i]])
+ irq = link->irq.possible[i];
+ }
}

/* Attempt to enable the link device at this IRQ. */
-
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