static long scom_ioctl()

in fsi-scom.c [485:512]

• 27 lines of code
• 6 McCabe index (conditional complexity)

static long scom_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
{
	struct scom_device *scom = file->private_data;
	void __user *argp = (void __user *)arg;
	int rc = -ENOTTY;

	mutex_lock(&scom->lock);
	if (scom->dead) {
		mutex_unlock(&scom->lock);
		return -ENODEV;
	}
	switch(cmd) {
	case FSI_SCOM_CHECK:
		rc = scom_check(scom, argp);
		break;
	case FSI_SCOM_READ:
		rc = scom_raw_read(scom, argp);
		break;
	case FSI_SCOM_WRITE:
		rc = scom_raw_write(scom, argp);
		break;
	case FSI_SCOM_RESET:
		rc = scom_reset(scom, argp);
		break;
	}
	mutex_unlock(&scom->lock);
	return rc;
}