Ben Widawsky f0a9f74c0d
drm/i915: Fix disabled semaphores ...
The ring will emit too many if semaphores are disabled since we do not
add the correct number to num_dwords anymore.
This was introduced:
commit 52ed23253b68e1cf154b03d91bed619504cf955b
Author: Ben Widawsky <benjamin.widawsky@intel.com>
Date: Mon Dec 16 20:50:38 2013 -0800
drm/i915: Don't emit mbox updates without semaphores
FWIW, the bug was fixed later in the series.
/me hangs head in shame.
Daniel: Also note that we should have merged the read-only semaphore
modparam before this patch.
Reported-by: Kenneth Graunke <kenneth@whitecape.org>
Signed-off-by: Ben Widawsky <ben@bwidawsk.net>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
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