[PATCH] dma-buf: use irq work for dma_fence_array_enable_signaling

[Eric Anholt]

Christian König <ckoenig.leichtzumerken at gmail.com> writes:

> Also use the irq work for dma_fence_array_enable_signaling to make sure
> that the spinlock for the dma-fence-array is always unrelated to all
> other spinlocks.
>
> This fixes a lockdep warning if a dma-fence-array is embedded into
> another dma-fence-array.
>
> Signed-off-by: Christian König <christian.koenig at amd.com>

Tested-by: Eric Anholt <eric at anholt.net>

With just the reset revert still in place, I've now made it an hour into
a conformance test run.
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