[PATCH] x86_64: Automatically enable apicmaintimer on ATI boards

They all have problems with IRQ 0 routing, so just use the APIC on them.

Can be overwritten with "noapicmaintimer"

Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 8 insertions, 0 deletions

diff --git a/arch/x86_64/kernel/io_apic.c b/arch/x86_64/kernel/io_apic.c
index 1a5060b434b8..4282d72b2a26 100644
--- a/arch/x86_64/kernel/io_apic.c
+++ b/arch/x86_64/kernel/io_apic.c
@@ -304,6 +304,14 @@ void __init check_ioapic(void)
 #endif
                                         /* RED-PEN skip them on mptables too? */
                                         return;
+                                case PCI_VENDOR_ID_ATI:
+                                        if (apic_runs_main_timer != 0)
+                                                break;
+                                        printk(KERN_INFO
+             "ATI board detected. Using APIC/PM timer.\n");
+                                        apic_runs_main_timer = 1;
+                                        nohpet = 1;
+                                        return;
                                 } 
 
                                 /* No multi-function device? */