tree 3474b9ab52408c78480a92a9d0c33626c61d7473
parent b580c9e2b7ba5030a795aa2fb73b796523d65a78
author Maarten Lankhorst <m.b.lankhorst@gmail.com> 1372333699 +0200
committer Dave Airlie <airlied@redhat.com> 1372385041 +1000

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>