From: Vincent Hanquez <vincent@snarc.org>
Date: Wed, 17 Dec 2008 17:32:01 +0000 (+0000)
Subject: patch power_management_vapic_follow_up
X-Git-Url: http://xenbits.xensource.com/gitweb?a=commitdiff_plain;h=1bc7ec6639f37797b27cbf80aa9d86838f853479;p=xenclient%2Fxen.git

patch power_management_vapic_follow_up
---

diff --git a/tools/firmware/hvmloader/acpi/build.c b/tools/firmware/hvmloader/acpi/build.c
index 874d714..a77e992 100644
--- a/tools/firmware/hvmloader/acpi/build.c
+++ b/tools/firmware/hvmloader/acpi/build.c
@@ -71,7 +71,13 @@ static int hpet_exists(unsigned long hpet_base)
 
 static uint8_t battery_port_exists(void)
 {
-    return (inb(0x88) & 0x2) ;
+    uint8_t val;
+
+    val = inb(0x88);
+    if ( (val == 0xff) || (val == 0x0) )
+        return 0;
+
+    return 1;
 }
 
 static int construct_bios_info_table(uint8_t *buf)