From fdfaa4833f984c6f8d44afb1fed6c0c775e6e67b Mon Sep 17 00:00:00 2001
From: York Sun <yorksun@freescale.com>
Date: Fri, 15 Aug 2008 00:40:29 -0700
Subject: freescale DIU: bug fix: add sanity check for AOI position

AOI position cannot be negative.

Signed-off-by: York Sun <yorksun@freescale.com>
Cc: Kumar Gala <galak@gate.crashing.org>
Cc: "Antonino A. Daplas" <adaplas@pol.net>
Cc: Krzysztof Helt <krzysztof.h1@poczta.fm>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
 drivers/video/fsl-diu-fb.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/video/fsl-diu-fb.c b/drivers/video/fsl-diu-fb.c
index d9d24938da9e..fb51197d1c98 100644
--- a/drivers/video/fsl-diu-fb.c
+++ b/drivers/video/fsl-diu-fb.c
@@ -479,6 +479,10 @@ static void adjust_aoi_size_position(struct fb_var_screeninfo *var,
 	base_plane_width = machine_data->fsl_diu_info[0]->var.xres;
 	base_plane_height = machine_data->fsl_diu_info[0]->var.yres;
 
+	if (mfbi->x_aoi_d < 0)
+		mfbi->x_aoi_d = 0;
+	if (mfbi->y_aoi_d < 0)
+		mfbi->y_aoi_d = 0;
 	switch (index) {
 	case 0:
 		if (mfbi->x_aoi_d != 0)
-- 
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