drm/i915: Reset ILK during GEM sanitization

ILK should survive a reset without display corruption.
Suggested-by: NChris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: NJoonas Lahtinen <joonas.lahtinen@linux.intel.com>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: NChris Wilson <chris@chris-wilson.co.uk>

drivers/gpu/drm/i915/i915_gem.c

@@ -4485,10 +4485,9 @@ void i915_gem_sanitize(struct drm_i915_private *i915)
 	 * try to take over. The only way to remove the earlier state
 	 * is by resetting. However, resetting on earlier gen is tricky as
 	 * it may impact the display and we are uncertain about the stability
-	 * of the reset, so we only reset recent machines with logical
-	 * context support (that must be reset to remove any stray contexts).
+	 * of the reset, so this could be applied to even earlier gen.
 	 */
-	if (INTEL_GEN(i915) >= 6) {
+	if (INTEL_GEN(i915) >= 5) {
 		int reset = intel_gpu_reset(i915, ALL_ENGINES);
 		WARN_ON(reset && reset != -ENODEV);
 	}