From 501b78cbc29a72d522cc435f22f8651f2733d3b2 Mon Sep 17 00:00:00 2001
From: Keir Fraser <keir.fraser@citrix.com>
Date: Thu, 15 Jan 2009 12:35:09 +0000
Subject: [PATCH] rombios: Protect the ax register before calling the TCG BIOS
 extensions function.

Signed-off-by: Stefan Berger <stefanb@us.ibm.com>
---
 tools/firmware/rombios/rombios.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/tools/firmware/rombios/rombios.c b/tools/firmware/rombios/rombios.c
index d960222048..914fdcee19 100644
--- a/tools/firmware/rombios/rombios.c
+++ b/tools/firmware/rombios/rombios.c
@@ -10447,7 +10447,9 @@ rom_scan:
   ;;   3         ROM initialization entry point (FAR CALL)
 
 #if BX_TCGBIOS
+  push ax
   call _tcpa_start_option_rom_scan    /* specs: 3.2.3.3 + 10.4.3 */
+  pop ax
 #endif
 
 rom_scan_loop:
-- 
2.30.2