drm/i915: Inject load failure inside intel_engines_init_mmio

We need extra load failure point to better test error path in
i915_driver_init_mmio.

Suggested-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Michal Wajdeczko <michal.wajdeczko@intel.com>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: https://patchwork.freedesktop.org/patch/msgid/20181011130008.24640-2-michal.wajdeczko@intel.com

diff --git a/drivers/gpu/drm/i915/intel_engine_cs.c b/drivers/gpu/drm/i915/intel_engine_cs.c
index 1c6143bdf5a46f971f99bd2f4b13ab6696df5760..f27dbe26bcc18d4db14fe4156372defc9cd65bc2 100644 (file)
--- a/drivers/gpu/drm/i915/intel_engine_cs.c
+++ b/drivers/gpu/drm/i915/intel_engine_cs.c
@@ -337,6 +337,9 @@ int intel_engines_init_mmio(struct drm_i915_private *dev_priv)
        WARN_ON(ring_mask &
                GENMASK(BITS_PER_TYPE(mask) - 1, I915_NUM_ENGINES));
 
+       if (i915_inject_load_failure())
+               return -ENODEV;
+
        for (i = 0; i < ARRAY_SIZE(intel_engines); i++) {
                if (!HAS_ENGINE(dev_priv, i))
                        continue;