2017-07-30 Chris Wilson <ch...@chris-wilson.co.uk>:
> Quoting Gustavo Padovan (2017-07-29 16:22:16)
> > From: Gustavo Padovan <gustavo.pado...@collabora.com>
> >
> > If userspace already dropped its own reference by closing the sw_sync
> > fence fd we might end up in a deadlock where
> > dma_fence_is_signaled_locked() will trigger the release of the fence and
> > thus try to hold the lock to remove the fence from the list.
> >
> > dma_fence_is_signaled_locked() tries to release/free the fence and hold
> > the lock in the process.
> >
> > We fix that by changing the order operation and clean up the list and
> > rb-tree first.
> >
> > v2: Drop the fence get/put dance and manipulate the list first (Chris
> > Wilson)
> >
> > Cc: Chris Wilson <ch...@chris-wilson.co.uk>
> > Signed-off-by: Gustavo Padovan <gustavo.pado...@collabora.com>
> Reviewed-by: Chris Wilson <ch...@chris-wilson.co.uk>
Thanks for reviewing. Pushed to drm-misc-next.
Gustavo
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