From 60320182d011a8c31793f833f36f65cd5e8b50df Mon Sep 17 00:00:00 2001
From: Aaron Durbin <adurbin@chromium.org>
Date: Wed, 28 Feb 2018 12:38:05 -0700
Subject: console: only allow console messages after initialization

The console subsystem allows printk() to be called prior to the
drivers and/or infrastructure is completely set up. In those
situations don't allow messages to be added until the console
is completely initialized.

BUG=b:73898539

Change-Id: Idc3840132d7f95f8e22045d7484c528d828bb0de
Signed-off-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-on: https://review.coreboot.org/24917
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Furquan Shaikh <furquan@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
---
 src/console/init.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/console/init.c b/src/console/init.c
index 78c568f96e..8f71b09881 100644
--- a/src/console/init.c
+++ b/src/console/init.c
@@ -14,6 +14,7 @@
  * GNU General Public License for more details.
  */
 
+#include <arch/early_variables.h>
 #include <console/console.h>
 #include <console/uart.h>
 #include <console/streams.h>
@@ -29,10 +30,13 @@
 #define CONSOLE_LEVEL_CONST 0
 #endif
 
+static int console_inited CAR_GLOBAL;
 static int console_loglevel = CONFIG_DEFAULT_CONSOLE_LOGLEVEL;
 
 static inline int get_log_level(void)
 {
+	if (car_get_var(console_inited) == 0)
+		return -1;
 	if (CONSOLE_LEVEL_CONST)
 		return get_console_loglevel();
 
@@ -74,6 +78,8 @@ asmlinkage void console_init(void)
 
 	console_hw_init();
 
+	car_set_var(console_inited, 1);
+
 	printk(BIOS_NOTICE, "\n\ncoreboot-%s%s %s " ENV_STRING " starting...\n",
 	       coreboot_version, coreboot_extra_version, coreboot_build);
 }
-- 
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