x86, irq: update_mptable needs pci_routeirq

To get all device irq routing and to save them.

This is basically an implicit pci=routeirq enablement if (and on if)
the update_mptable boot option (which is off by default) has been
specified.

[ Impact: extend the update_mptable boot opion's scope ]

Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Cc: Jesse Barnes <jbarnes@virtuousgeek.org>
LKML-Reference: <4A0DB7B4.4060702@kernel.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 7 insertions, 0 deletions

diff --git a/arch/x86/kernel/mpparse.c b/arch/x86/kernel/mpparse.c
index cd2a41a7c45c..e6bf9d08e503 100644
--- a/arch/x86/kernel/mpparse.c
+++ b/arch/x86/kernel/mpparse.c
@@ -17,6 +17,7 @@
 #include <linux/acpi.h>
 #include <linux/module.h>
 #include <linux/smp.h>
+#include <linux/pci.h>
 
 #include <asm/mtrr.h>
 #include <asm/mpspec.h>
@@ -961,6 +962,9 @@ static int __initdata enable_update_mptable;
 static int __init update_mptable_setup(char *str)
 {
         enable_update_mptable = 1;
+#ifdef CONFIG_PCI
+        pci_routeirq = 1;
+#endif
         return 0;
 }
 early_param("update_mptable", update_mptable_setup);
@@ -973,6 +977,9 @@ static int __initdata alloc_mptable;
 static int __init parse_alloc_mptable_opt(char *p)
 {
         enable_update_mptable = 1;
+#ifdef CONFIG_PCI
+        pci_routeirq = 1;
+#endif
         alloc_mptable = 1;
         if (!p)
                 return 0;