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Whilst we reset the GPU, we want to prevent execlists from submitting new work (which it does via an interrupt handler). To achieve this we disable the irq (and drain the irq tasklet) around the reset. When we enable it again afters, the interrupt queue should be empty and we can reinitialise from a known state without fear of the tasklet running concurrently. Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> Cc: Mika Kuoppala <mika.kuoppala@intel.com> Reviewed-by: Mika Kuoppala <mika.kuoppala@intel.com> Link: http://patchwork.freedesktop.org/patch/msgid/20161004201132.21801-4-chris@chris-wilson.co.uk |
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