static long cs_char_ioctl()

in clients/cmt_speech.c [1199:1257]

• 47 lines of code
• 10 McCabe index (conditional complexity)

static long cs_char_ioctl(struct file *file, unsigned int cmd,
				unsigned long arg)
{
	struct cs_char *csdata = file->private_data;
	int r = 0;

	switch (cmd) {
	case CS_GET_STATE: {
		unsigned int state;

		state = cs_hsi_get_state(csdata->hi);
		if (copy_to_user((void __user *)arg, &state, sizeof(state)))
			r = -EFAULT;

		break;
	}
	case CS_SET_WAKELINE: {
		unsigned int state;

		if (copy_from_user(&state, (void __user *)arg, sizeof(state))) {
			r = -EFAULT;
			break;
		}

		if (state > 1) {
			r = -EINVAL;
			break;
		}

		cs_hsi_set_wakeline(csdata->hi, !!state);

		break;
	}
	case CS_GET_IF_VERSION: {
		unsigned int ifver = CS_IF_VERSION;

		if (copy_to_user((void __user *)arg, &ifver, sizeof(ifver)))
			r = -EFAULT;

		break;
	}
	case CS_CONFIG_BUFS: {
		struct cs_buffer_config buf_cfg;

		if (copy_from_user(&buf_cfg, (void __user *)arg,
							sizeof(buf_cfg)))
			r = -EFAULT;
		else
			r = cs_hsi_buf_config(csdata->hi, &buf_cfg);

		break;
	}
	default:
		r = -ENOTTY;
		break;
	}

	return r;
}