From: Tang Chen <tangchen@cn.fujitsu.com>
Date: Tue, 23 Jul 2013 08:00:19 +0000 (+0800)
Subject: x86/acpi: Fix incorrect sanity check in acpi_register_lapic()
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=82982d729319e975115d88cae4927dffb02bfea7;p=linux-beck.git

x86/acpi: Fix incorrect sanity check in acpi_register_lapic()

We wanted to check if the APIC ID is out of range. It should be:

	if (id >= MAX_LOCAL_APIC)

There's no known bad effect of this bug.

Signed-off-by: Tang Chen <tangchen@cn.fujitsu.com>
Reviewed-by: Len Brown <len.brown@intel.com>
Cc: pavel@ucw.cz
Cc: rjw@sisk.pl
Link: http://lkml.kernel.org/r/1374566419-21120-1-git-send-email-tangchen@cn.fujitsu.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
---

diff --git a/arch/x86/kernel/acpi/boot.c b/arch/x86/kernel/acpi/boot.c
index 2627a81253ee..872a2d255e41 100644
--- a/arch/x86/kernel/acpi/boot.c
+++ b/arch/x86/kernel/acpi/boot.c
@@ -199,7 +199,7 @@ static void acpi_register_lapic(int id, u8 enabled)
 {
 	unsigned int ver = 0;
 
-	if (id >= (MAX_LOCAL_APIC-1)) {
+	if (id >= MAX_LOCAL_APIC) {
 		printk(KERN_INFO PREFIX "skipped apicid that is too big\n");
 		return;
 	}