From 3bc2913e2cb74aac8af90b46fa251dfb8d854665 Mon Sep 17 00:00:00 2001
From: Ben Widawsky <ben@bwidawsk.net>
Date: Wed, 26 Sep 2012 16:15:20 -0700
Subject: [PATCH] drm/i915: Fix set_caching locking

On the EINVAL case we don't release struct_mutex. It should be safe to
grab the lock after checking the parameters, which also resolves the
issues.

Signed-off-by: Ben Widawsky <ben@bwidawsk.net>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
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