From: Florian Mickler <florian@mickler.org>
Date: Mon, 6 Apr 2009 20:55:41 +0000 (+0200)
Subject: drm/i915: Fix use of uninitialized var in 40a5f0de
X-Git-Tag: v2.6.30-rc2~1^2~3
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=2bc43b5cf5158a26fa1328234795abed2dff5275;p=pandora-kernel.git

drm/i915: Fix use of uninitialized var in 40a5f0de

i915_gem_put_relocs_to_user returned an uninitialized value which
got returned to userspace. This caused libdrm in my setup to never
get out of a do{}while() loop retrying i915_gem_execbuffer.

result was hanging X, overheating of cpu and 2-3gb of logfile-spam.

This patch adresses the issue by
 1. initializing vars in this file where necessary
 2. correcting wrongly interpreted return values of copy_[from/to]_user

Signed-off-by: Florian Mickler <florian@mickler.org>
[anholt: cleanups of unnecessary changes, consistency in APIs]
Signed-off-by: Eric Anholt <eric@anholt.net>
---

Reading git-diff-tree failed