From: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Date: Tue, 14 Jun 2011 09:25:02 +0000 (+0000)
Subject: tridentfb: use display information in info not in var for panning
X-Git-Url: http://drtracing.org/?a=commitdiff_plain;h=e4c735af0076923643af48577fc9ad6e123a55fa;p=deliverable%2Flinux.git

tridentfb: 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>
Cc: Krzysztof Helt <krzysztof.h1@wp.pl>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
---

diff --git a/drivers/video/tridentfb.c b/drivers/video/tridentfb.c
index c6c77562839d..34cf019bba44 100644
--- a/drivers/video/tridentfb.c
+++ b/drivers/video/tridentfb.c
@@ -987,8 +987,8 @@ static int tridentfb_pan_display(struct fb_var_screeninfo *var,
 	unsigned int offset;
 
 	debug("enter\n");
-	offset = (var->xoffset + (var->yoffset * var->xres_virtual))
-		* var->bits_per_pixel / 32;
+	offset = (var->xoffset + (var->yoffset * info->var.xres_virtual))
+		* info->var.bits_per_pixel / 32;
 	set_screen_start(par, offset);
 	debug("exit\n");
 	return 0;