[PATCH] x86-64: i386/x86-64: Fix time going twice as fast problem on ATI Xpress chipsets
Original patch from Bertro Simul
This is probably still not quite correct, but seems to be
the best solution so far.
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
diff --git a/arch/i386/kernel/acpi/earlyquirk.c b/arch/i386/kernel/acpi/earlyquirk.c
index f1b9d2a..087ecc6 100644
--- a/arch/i386/kernel/acpi/earlyquirk.c
+++ b/arch/i386/kernel/acpi/earlyquirk.c
@@ -15,6 +15,13 @@
if (vendor == PCI_VENDOR_ID_NVIDIA) {
acpi_skip_timer_override = 1;
}
+ /*
+ * ATI IXP chipsets get double timer interrupts.
+ * For now just do this for all ATI chipsets.
+ * FIXME: this needs to be checked for the non ACPI case too.
+ */
+ if (vendor == PCI_VENDOR_ID_ATI)
+ disable_timer_pin_1 = 1;
return 0;
}