[Intel-gfx] [PATCH v2 1/2] drm/i915/guc: keep breadcrumb irq always enabled

[Chris Wilson]

Quoting Daniele Ceraolo Spurio (2019-08-13 00:31:50)
> We rely on the tasklet to update the GT PM refcount, so we can't disable
> it even if we've processed all the requests for the engine because we
> might have detected the request completion before the interrupt arrived.
> 
> Since on all platforms on which we plan to support guc submission we
> don't allow disabling the breadcrumb interrupts, we can further siplify
> the park/unpark flow by removing the interrupt pin/unpin. A BUG_ON has
> been added to catch changes to this flow that would require us to
> restore some kind of pinning.
> 
> v2: split removal of engine_pin/unpin_breadcrumbs_irq to its own
>     patch (chris)
> 
> Signed-off-by: Daniele Ceraolo Spurio <daniele.ceraolospurio at intel.com>
> Cc: Chris Wilson <chris at chris-wilson.co.uk>
> Cc: Michal Wajdeczko <michal.wajdeczko at intel.com>
> Reviewed-by: Chris Wilson <chris at chris-wilson.co.uk>

And pushed, thanks for the fix.
-Chris