static int greybus_probe()

in core.c [165:223]

• 38 lines of code
• 5 McCabe index (conditional complexity)

static int greybus_probe(struct device *dev)
{
	struct greybus_driver *driver = to_greybus_driver(dev->driver);
	struct gb_bundle *bundle = to_gb_bundle(dev);
	const struct greybus_bundle_id *id;
	int retval;

	/* match id */
	id = greybus_match_id(bundle, driver->id_table);
	if (!id)
		return -ENODEV;

	retval = pm_runtime_get_sync(&bundle->intf->dev);
	if (retval < 0) {
		pm_runtime_put_noidle(&bundle->intf->dev);
		return retval;
	}

	retval = gb_control_bundle_activate(bundle->intf->control, bundle->id);
	if (retval) {
		pm_runtime_put(&bundle->intf->dev);
		return retval;
	}

	/*
	 * Unbound bundle devices are always deactivated. During probe, the
	 * Runtime PM is set to enabled and active and the usage count is
	 * incremented. If the driver supports runtime PM, it should call
	 * pm_runtime_put() in its probe routine and pm_runtime_get_sync()
	 * in remove routine.
	 */
	pm_runtime_set_autosuspend_delay(dev, GB_BUNDLE_AUTOSUSPEND_MS);
	pm_runtime_use_autosuspend(dev);
	pm_runtime_get_noresume(dev);
	pm_runtime_set_active(dev);
	pm_runtime_enable(dev);

	retval = driver->probe(bundle, id);
	if (retval) {
		/*
		 * Catch buggy drivers that fail to destroy their connections.
		 */
		WARN_ON(!list_empty(&bundle->connections));

		gb_control_bundle_deactivate(bundle->intf->control, bundle->id);

		pm_runtime_disable(dev);
		pm_runtime_set_suspended(dev);
		pm_runtime_put_noidle(dev);
		pm_runtime_dont_use_autosuspend(dev);
		pm_runtime_put(&bundle->intf->dev);

		return retval;
	}

	pm_runtime_put(&bundle->intf->dev);

	return 0;
}