[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>

diff --git a/arch/x86_64/kernel/io_apic.c b/arch/x86_64/kernel/io_apic.c
index 1a5060b434b8a8858d2be94d3aaa2eb05c4e32fd..4282d72b2a260e28c2aa2c9c272b8b8ef8621d7b 100644 (file)
--- 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? */