On Thu, Aug 3, 2017 at 11:15 AM, Chris Wilson <[email protected]> wrote:
> Quoting Jason Ekstrand (2017-08-03 19:06:02) > > I'm not concerned about what happens to racy clients. They get what > they get. > > What concerns me is what happens if somehow the fence is replaced and > deleted > > before i915_gem_request_await_dma_fence takes it's reference. Can this > cause > > the kernel to segfault? > > Gotcha, yup nothing prevents that. > > fence = dma_fence_get_rcu_safe(&syncobj->fence); > if (!fence) > return -EINVAL; > > err = await_fence(); > dma_fence_put(fence); > if (err < 0) > return; > > Happy? > Assuming dma_fence_get_rcu_safe does what I think it does, then yes.
_______________________________________________ dri-devel mailing list [email protected] https://lists.freedesktop.org/mailman/listinfo/dri-devel
