drm/i915/selftests: Fixup GuC FW negative test
Since: 0d4b78b3 ("drm/i915/guc: Assert we have the doorbell before setting it up") We have asserts in GuC doorbell related functions, which is a good thing. Unfortunately, we were using those to check whether GuC FW is refusing to allocate invalid doorbell - which makes the test fail. Well, it would make the test WARN, except we fumbled cleanup ordering and eat the BUG_ON instead. Let's keep the asserts and use the internal implementation in the test. Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=107186Signed-off-by: NMichał Winiarski <michal.winiarski@intel.com> Cc: Chris Wilson <chris@chris-wilson.co.uk> Cc: Michel Thierry <michel.thierry@intel.com> Reviewed-by: NChris Wilson <chris@chris-wilson.co.uk> Link: https://patchwork.freedesktop.org/patch/msgid/20180712112013.3253-1-chris@chris-wilson.co.ukSigned-off-by: NChris Wilson <chris@chris-wilson.co.uk>
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