From: Linus Torvalds <torvalds@g5.osdl.org>
Date: Wed, 14 Sep 2005 22:56:27 +0000 (-0700)
Subject: Partially revert "Fix time going twice as fast problem on ATI Xpress chipsets"
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=1619cca2921f6927f4240e03f413d4165c7002fc;p=GitHub%2FLineageOS%2Fandroid_kernel_motorola_exynos9610.git

Partially revert "Fix time going twice as fast problem on ATI Xpress chipsets"

Commit 66759a01adbfe8828dd063e32cf5ed3f46696181 introduced the fix for
time ticking too fast on some boards by disabling one of the doubly
connected timer pins on ATI boards.

However, it ends up being _much_ too broad a brush, and that just makes
some other ATI boards not work at all since they now have no timer
source.

So disable the automatic ATI southbridge detection, and just rely on
people who see this problem disabling it by hand with the option
"disable_timer_pin_1" on the kernel command line.

Maybe somebody can figure out the proper tests at a later date.

Acked-by: Peter Osterlund <petero2@telia.com>
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 1ae2aeeda18b..f1b9d2a46dab 100644
--- a/arch/i386/kernel/acpi/earlyquirk.c
+++ b/arch/i386/kernel/acpi/earlyquirk.c
@@ -7,7 +7,6 @@
 #include <linux/pci.h>
 #include <asm/pci-direct.h>
 #include <asm/acpi.h>
-#include <asm/apic.h>
 
 static int __init check_bridge(int vendor, int device)
 {
@@ -16,15 +15,6 @@ static int __init check_bridge(int vendor, int device)
 	if (vendor == PCI_VENDOR_ID_NVIDIA) {
 		acpi_skip_timer_override = 1;
 	}
-#ifdef CONFIG_X86_LOCAL_APIC
-	/*
-	 * 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;
-#endif
 	return 0;
 }
 
diff --git a/arch/x86_64/kernel/io_apic.c b/arch/x86_64/kernel/io_apic.c
index 522944a000ad..c8eee20cd519 100644
--- a/arch/x86_64/kernel/io_apic.c
+++ b/arch/x86_64/kernel/io_apic.c
@@ -299,15 +299,6 @@ void __init check_ioapic(void)
 #endif
 					/* RED-PEN skip them on mptables too? */
 					return;
-				case PCI_VENDOR_ID_ATI:
-					/* All timer interrupts on atiixp
-				           are doubled. Disable one. */
-					if (disable_timer_pin_1 == 0) {
-						disable_timer_pin_1 = 1;
-						printk(KERN_INFO
-		"ATI board detected. Disabling timer pin 1.\n");
-					}
-					return;
 				} 
 
 				/* No multi-function device? */