Chris Wilson dcd79934b0 drm/i915: Unconditionally flush any chipset buffers before execbuf ... If userspace is asynchronously streaming into the batch or other execobjects, we may not flush those writes along with a change in cache domain (as there is no change). Therefore those writes may end up in internal chipset buffers and not visible to the GPU upon execution. We must issue a flush command or otherwise we encounter incoherency in the batchbuffers and the GPU executing invalid commands (i.e. hanging) quite regularly. v2: Throw a paranoid wmb() into the general flush so that we remain consistent with before. Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=90841 Fixes: 1816f92363 ("drm/i915: Support creation of unbound wc user...") Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> Cc: Akash Goel <akash.goel@intel.com> Cc: Daniel Vetter <daniel.vetter@ffwll.ch> Cc: Tvrtko Ursulin <tvrtko.ursulin@linux.intel.com> Tested-by: Matti Hämäläinen <ccr@tnsp.org> Cc: stable@vger.kernel.org Reviewed-by: Mika Kuoppala <mika.kuoppala@intel.com> Link: http://patchwork.freedesktop.org/patch/msgid/20160818161718.27187-1-chris@chris-wilson.co.uk (cherry picked from commit 600f436801) Signed-off-by: Jani Nikula <jani.nikula@intel.com>		2016-08-22 16:04:50 +03:00
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drm	drm/i915: Unconditionally flush any chipset buffers before execbuf	2016-08-22 16:04:50 +03:00
host1x	gpu: host1x: Remove useless local variable	2016-06-23 11:59:33 +02:00
ipu-v3	gpu: ipu-v3: ipu-dc: don't bug out on invalid bus_format	2016-07-12 18:26:05 +02:00
vga	vga_switcheroo: Sphinxify docs	2016-07-12 16:14:36 +02:00
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