static int __maybe_unused intel_suspend()

in intel.c [1601:1652]

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

static int __maybe_unused intel_suspend(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;
	}

	if (pm_runtime_suspended(dev)) {
		dev_dbg(dev, "%s: pm_runtime status: suspended\n", __func__);

		clock_stop_quirks = sdw->link_res->clock_stop_quirks;

		if ((clock_stop_quirks & SDW_INTEL_CLK_STOP_BUS_RESET) ||
		    !clock_stop_quirks) {

			if (pm_runtime_suspended(dev->parent)) {
				/*
				 * paranoia check: this should not happen with the .prepare
				 * resume to full power
				 */
				dev_err(dev, "%s: invalid config: parent is suspended\n", __func__);
			} else {
				intel_shim_wake(sdw, false);
			}
		}

		return 0;
	}

	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);

	return 0;
}