static int ps3_sys_manager_handle_event()

in ps3-sys-manager.c [403:478]

• 61 lines of code
• 11 McCabe index (conditional complexity)

static int ps3_sys_manager_handle_event(struct ps3_system_bus_device *dev)
{
	int result;
	struct {
		u8 version;
		u8 type;
		u8 reserved_1[2];
		u32 value;
		u8 reserved_2[8];
	} event;

	BUILD_BUG_ON(sizeof(event) != 16);

	result = ps3_vuart_read(dev, &event, sizeof(event));
	BUG_ON(result && "need to retry here");

	if (event.version != 1) {
		dev_dbg(&dev->core, "%s:%d: unsupported event version (%u)\n",
			__func__, __LINE__, event.version);
		return -EIO;
	}

	switch (event.type) {
	case PS3_SM_EVENT_POWER_PRESSED:
		dev_dbg(&dev->core, "%s:%d: POWER_PRESSED (%s)\n",
			__func__, __LINE__,
			(event.value == PS3_SM_BUTTON_EVENT_SOFT ? "soft"
			: "hard"));
		ps3_sm_force_power_off = 1;
		/*
		 * A memory barrier is use here to sync memory since
		 * ps3_sys_manager_final_restart() could be called on
		 * another cpu.
		 */
		wmb();
		kill_cad_pid(SIGINT, 1); /* ctrl_alt_del */
		break;
	case PS3_SM_EVENT_POWER_RELEASED:
		dev_dbg(&dev->core, "%s:%d: POWER_RELEASED (%u ms)\n",
			__func__, __LINE__, event.value);
		break;
	case PS3_SM_EVENT_RESET_PRESSED:
		dev_dbg(&dev->core, "%s:%d: RESET_PRESSED (%s)\n",
			__func__, __LINE__,
			(event.value == PS3_SM_BUTTON_EVENT_SOFT ? "soft"
			: "hard"));
		ps3_sm_force_power_off = 0;
		/*
		 * A memory barrier is use here to sync memory since
		 * ps3_sys_manager_final_restart() could be called on
		 * another cpu.
		 */
		wmb();
		kill_cad_pid(SIGINT, 1); /* ctrl_alt_del */
		break;
	case PS3_SM_EVENT_RESET_RELEASED:
		dev_dbg(&dev->core, "%s:%d: RESET_RELEASED (%u ms)\n",
			__func__, __LINE__, event.value);
		break;
	case PS3_SM_EVENT_THERMAL_ALERT:
		dev_dbg(&dev->core, "%s:%d: THERMAL_ALERT (zone %u)\n",
			__func__, __LINE__, event.value);
		pr_info("PS3 Thermal Alert Zone %u\n", event.value);
		break;
	case PS3_SM_EVENT_THERMAL_CLEARED:
		dev_dbg(&dev->core, "%s:%d: THERMAL_CLEARED (zone %u)\n",
			__func__, __LINE__, event.value);
		break;
	default:
		dev_dbg(&dev->core, "%s:%d: unknown event (%u)\n",
			__func__, __LINE__, event.type);
		return -EIO;
	}

	return 0;
}