Quoting Chris Wilson (2017-12-17 13:28:50)
> Inside i915_gem_reset(), we start touching the HW and so require the
> low-level HW to be re-enabled, in particular the PCI BARs.
>
> Fixes: 7b6da818d86f ("drm/i915: Restore the kernel context after a GPU reset
> on an idle engine")
References: 0db8c9612091 ("drm/i915: Re-enable GTT following a device reset")
Maybe fixes?
-Chris
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