From 4e9bb47bd29e02f2daaa7bdb2a8ddf977bf76f06 Mon Sep 17 00:00:00 2001
From: Hai Lan <hai.lan@intel.com>
Date: Wed, 15 Feb 2012 19:07:02 +0800
Subject: [PATCH] drm/i915: fix a sprite watermark computation to avoid divide
 by zero if xpos<0

When setting overlay position with x<0, it will divide 0 and make drm
driver crash.

Signed-off-by: Hai Lan <hai.lan@intel.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
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