[PATCH 2/2] drm/vc4: Ensure interrupts are disabled

[Eric Anholt]

Stefan Schake <stschake at gmail.com> writes:

> The overflow mem work callback vc4_overflow_mem_work reenables its
> associated interrupt upon completion. To ensure all interrupts are disabled
> when we return from vc4_irq_uninstall, we need to disable it again if
> cancel_work_sync indicated pending work.

Is there a reason we need the interrupts disabled at the V3D level while
we have the IRQ disabled at the irqchip level?  Once we re-enable at the
irqchip, we immediately V3D_WRITE(V3D_INTENA, V3D_DRIVER_IRQS) anyway.
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