From: Duncan Laurie <dlaurie@chromium.org>
Date: Sat, 3 Nov 2012 11:41:40 +0000 (+0000)
Subject: video: Check for valid FB pointer before clearing
X-Git-Tag: v2013.01-rc2~73^2~5
X-Git-Url: https://git.sur5r.net/?a=commitdiff_plain;h=ae63057446b8bb45c37a6ea4e5db162ba4f25c78;p=u-boot

video: Check for valid FB pointer before clearing

This command will start erasing at memory address zero
if there is not a valid framebuffer address that was found
during video_init().

This is a common case with Chrome OS devices in normal mode
when we do not execute the video option rom in coreboot.

Signed-off-by: Duncan Laurie <dlaurie@chromium.org>
Signed-off-by: Simon Glass <sjg@chromium.org>
---

diff --git a/drivers/video/cfb_console.c b/drivers/video/cfb_console.c
index 9388859da7..26f673a96a 100644
--- a/drivers/video/cfb_console.c
+++ b/drivers/video/cfb_console.c
@@ -2293,6 +2293,8 @@ int video_get_screen_columns(void)
 
 void video_clear(void)
 {
+	if (!video_fb_address)
+		return;
 #ifdef VIDEO_HW_RECTFILL
 	video_hw_rectfill(VIDEO_PIXEL_SIZE,	/* bytes per pixel */
 			  0,			/* dest pos x */