[PATCH 09/27] drm/etnaviv: don't flush workqueue in etnaviv_gpu_wait_obj_inactive
p.zabel at pengutronix.de
Fri Dec 1 16:39:38 UTC 2017
On Fri, 2017-12-01 at 11:36 +0100, Lucas Stach wrote:
> There is no need to synchronize with oustanding retire jobs if the object
> has gone idle. Retire jobs only ever change the object state from active to
> idle, not the other way around.
> The IOVA put race is uncritical, as the GEM_WAIT ioctl itself is holding
> a reference to the GEM object, so the retire worker will not pull the
> object into the CPU domain, which is the thing we are trying to guard
> against with etnaviv_gpu_wait_obj_inactive.
> Signed-off-by: Lucas Stach <l.stach at pengutronix.de>
Reviewed-by: Philipp Zabel <p.zabel at pengutronix.de>
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