From: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Date: Tue, 14 Jun 2011 09:24:50 +0000 (+0000)
Subject: imsttfb: use display information in info not in var for panning
X-Git-Url: http://drtracing.org/?a=commitdiff_plain;h=c12665ffcf4e5e67b84771d30fb76dd9ff16600e;p=deliverable%2Flinux.git

imsttfb: 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/imsttfb.c b/drivers/video/imsttfb.c
index efb2c10656b0..8149356471e4 100644
--- a/drivers/video/imsttfb.c
+++ b/drivers/video/imsttfb.c
@@ -749,7 +749,7 @@ set_offset (struct fb_var_screeninfo *var, struct fb_info *info)
 {
 	struct imstt_par *par = info->par;
 	__u32 off = var->yoffset * (info->fix.line_length >> 3)
-		    + ((var->xoffset * (var->bits_per_pixel >> 3)) >> 3);
+		    + ((var->xoffset * (info->var.bits_per_pixel >> 3)) >> 3);
 	write_reg_le32(par->dc_regs, SSR, off);
 }