drm/i915: Add a fault injection point to WOPCM init

Add a fault injection point in the WOPCM initialization path.

v4:
Move the injection inside the WOPCM init function.

Signed-off-by: Jakub Bartmiński <[e-mail]>
Cc: Chris Wilson <[e-mail]>
Cc: Michał Winiarski <[e-mail]>
Cc: Michal Wajdeczko <[e-mail]>
Reviewed-by: Michal Wajdeczko <[e-mail]>
Reviewed-by: Chris Wilson <[e-mail]>
Signed-off-by: Chris Wilson <[e-mail]>
Link: https://patchwork.freedesktop.org/patch/msgid/[e-mail]

drivers/gpu/drm/i915/intel_wopcm.c

···
 
 	GEM_BUG_ON(!wopcm->size);
 
+	if (i915_inject_load_failure())
+		return -E2BIG;
+
 	if (guc_fw_size >= wopcm->size) {
 		DRM_ERROR("GuC FW (%uKiB) is too big to fit in WOPCM.",
 			  guc_fw_size / 1024);