drm/i915: stop registering if drm_dev_register() fails

If drm_dev_register() fails there is no reason to continue registering
the driver and initializing.
Signed-off-by: Lucas De Marchi <lucas.demarchi@intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: https://patchwork.freedesktop.org/patch/msgid/20210213042756.953007-1-lucas.demarchi@intel.com

drivers/gpu/drm/i915/i915_drv.c

@@ -664,17 +664,19 @@ static void i915_driver_register(struct drm_i915_private *dev_priv)
 	intel_vgpu_register(dev_priv);
 
 	/* Reveal our presence to userspace */
-	if (drm_dev_register(dev, 0) == 0) {
-		i915_debugfs_register(dev_priv);
-		if (HAS_DISPLAY(dev_priv))
-			intel_display_debugfs_register(dev_priv);
-		i915_setup_sysfs(dev_priv);
-
-		/* Depends on sysfs having been initialized */
-		i915_perf_register(dev_priv);
-	} else
+	if (drm_dev_register(dev, 0)) {
 		drm_err(&dev_priv->drm,
 			"Failed to register driver for userspace access!\n");
+		return;
+	}
+
+	i915_debugfs_register(dev_priv);
+	if (HAS_DISPLAY(dev_priv))
+		intel_display_debugfs_register(dev_priv);
+	i915_setup_sysfs(dev_priv);
+
+	/* Depends on sysfs having been initialized */
+	i915_perf_register(dev_priv);
 
 	if (HAS_DISPLAY(dev_priv)) {
 		/* Must be done after probing outputs */