From: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Date: Tue, 14 Jun 2011 09:24:41 +0000 (+0000)
Subject: acornfb: use display information in info not in var for panning
X-Git-Url: http://drtracing.org/?a=commitdiff_plain;h=1dbe8514fdb9ec6c82aa295c57886dfcf17574f1;p=deliverable%2Flinux.git

acornfb: 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>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
---

diff --git a/drivers/video/acornfb.c b/drivers/video/acornfb.c
index 3bacc1290548..b303f1715065 100644
--- a/drivers/video/acornfb.c
+++ b/drivers/video/acornfb.c
@@ -850,9 +850,9 @@ acornfb_pan_display(struct fb_var_screeninfo *var, struct fb_info *info)
 	u_int y_bottom = var->yoffset;
 
 	if (!(var->vmode & FB_VMODE_YWRAP))
-		y_bottom += var->yres;
+		y_bottom += info->var.yres;
 
-	if (y_bottom > var->yres_virtual)
+	if (y_bottom > info->var.yres_virtual)
 		return -EINVAL;
 
 	acornfb_update_dma(info, var);