static int __maybe_unused intel_suspend_runtime()

in intel.c [1654:1716]

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

static int __maybe_unused intel_suspend_runtime(struct device *dev)
{
	struct sdw_cdns *cdns = dev_get_drvdata(dev);
	struct sdw_intel *sdw = cdns_to_intel(cdns);
	struct sdw_bus *bus = &cdns->bus;
	u32 clock_stop_quirks;
	int ret;

	if (bus->prop.hw_disabled || !sdw->startup_done) {
		dev_dbg(dev, "SoundWire master %d is disabled or not-started, ignoring\n",
			bus->link_id);
		return 0;
	}

	clock_stop_quirks = sdw->link_res->clock_stop_quirks;

	if (clock_stop_quirks & SDW_INTEL_CLK_STOP_TEARDOWN) {

		ret = sdw_cdns_enable_interrupt(cdns, false);
		if (ret < 0) {
			dev_err(dev, "cannot disable interrupts on suspend\n");
			return ret;
		}

		ret = intel_link_power_down(sdw);
		if (ret) {
			dev_err(dev, "Link power down failed: %d\n", ret);
			return ret;
		}

		intel_shim_wake(sdw, false);

	} else if (clock_stop_quirks & SDW_INTEL_CLK_STOP_BUS_RESET ||
		   !clock_stop_quirks) {
		bool wake_enable = true;

		ret = sdw_cdns_clock_stop(cdns, true);
		if (ret < 0) {
			dev_err(dev, "cannot enable clock stop on suspend\n");
			wake_enable = false;
		}

		ret = sdw_cdns_enable_interrupt(cdns, false);
		if (ret < 0) {
			dev_err(dev, "cannot disable interrupts on suspend\n");
			return ret;
		}

		ret = intel_link_power_down(sdw);
		if (ret) {
			dev_err(dev, "Link power down failed: %d\n", ret);
			return ret;
		}

		intel_shim_wake(sdw, wake_enable);
	} else {
		dev_err(dev, "%s clock_stop_quirks %x unsupported\n",
			__func__, clock_stop_quirks);
		ret = -EINVAL;
	}

	return ret;
}