From: Jesse Barnes <jbarnes@virtuousgeek.org>
Date: Thu, 8 Jan 2009 18:42:15 +0000 (-0800)
Subject: drm/i915: don't enable vblanks on disabled pipes
X-Git-Tag: v2.6.29-rc2~7^2~7
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=71e0ffa599f54058d9b8724b4b14d0486751681d;p=pandora-kernel.git

drm/i915: don't enable vblanks on disabled pipes

In some cases userland may be confused and try to wait on vblank events from
pipes that aren't actually enabled.  We shouldn't allow this, so return
-EINVAL if the pipe isn't on.

Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Eric Anholt <eric@anholt.net>
Signed-off-by: Dave Airlie <airlied@linux.ie>
---

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