static int intel_qep_preset_enable_write()

in intel-qep.c [340:367]

• 23 lines of code
• 3 McCabe index (conditional complexity)

static int intel_qep_preset_enable_write(struct counter_device *counter,
					 struct counter_count *count, u8 val)
{
	struct intel_qep *qep = counter_priv(counter);
	u32 reg;
	int ret = 0;

	mutex_lock(&qep->lock);
	if (qep->enabled) {
		ret = -EBUSY;
		goto out;
	}

	pm_runtime_get_sync(qep->dev);
	reg = intel_qep_readl(qep, INTEL_QEPCON);
	if (val)
		reg &= ~INTEL_QEPCON_COUNT_RST_MODE;
	else
		reg |= INTEL_QEPCON_COUNT_RST_MODE;

	intel_qep_writel(qep, INTEL_QEPCON, reg);
	pm_runtime_put(qep->dev);

out:
	mutex_unlock(&qep->lock);

	return ret;
}