From: Maarten Lankhorst <m.b.lankhorst@gmail.com>
Date: Thu, 27 Jun 2013 11:48:19 +0000 (+0200)
Subject: drm/ttm: convert to the reservation api
X-Git-Tag: v3.11-rc1~65^2~47
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=5e338405119a80aa59e811626739122d1c15045d;p=pandora-kernel.git

drm/ttm: convert to the reservation api

Now that the code is compatible in semantics, flip the switch.
Use ww_mutex instead of the homegrown implementation.

ww_mutex uses -EDEADLK to signal that the caller has to back off,
and -EALREADY to indicate this buffer is already held by the caller.

ttm used -EAGAIN and -EDEADLK for those, respectively. So some changes
were needed to handle this correctly.

Signed-off-by: Maarten Lankhorst <maarten.lankhorst@canonical.com>
Reviewed-by: Jerome Glisse <jglisse@redhat.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
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