From: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Date: Wed, 25 May 2011 09:34:52 +0000 (+0200)
Subject: gxt4500: use display information in info not in var for panning
X-Git-Url: https://openfabrics.org/gitweb/?a=commitdiff_plain;h=1d4b695fa32b707b40fe2dab6a21a39bd91f4615;p=~shefty%2Frdma-dev.git

gxt4500: use display information in info not in var for panning

We must not use any information in the passed var besides xoffset,
yoffset and vmode as otherwise applications might abuse it.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
---

diff --git a/drivers/video/gxt4500.c b/drivers/video/gxt4500.c
index 896e53dea90..0fad23f810a 100644
--- a/drivers/video/gxt4500.c
+++ b/drivers/video/gxt4500.c
@@ -543,8 +543,8 @@ static int gxt4500_pan_display(struct fb_var_screeninfo *var,
 
 	if (var->xoffset & 7)
 		return -EINVAL;
-	if (var->xoffset + var->xres > var->xres_virtual ||
-	    var->yoffset + var->yres > var->yres_virtual)
+	if (var->xoffset + info->var.xres > info->var.xres_virtual ||
+	    var->yoffset + info->var.yres > info->var.yres_virtual)
 		return -EINVAL;
 
 	writereg(par, REFRESH_START, (var->xoffset << 16) | var->yoffset);