static int cs_hsi_data_sync()

in clients/cmt_speech.c [833:877]

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

static int cs_hsi_data_sync(struct cs_hsi_iface *hi)
{
	int r = 0;

	spin_lock_bh(&hi->lock);

	if (!cs_state_xfer_active(hi->data_state)) {
		dev_dbg(&hi->cl->device, "hsi_data_sync break, idle\n");
		goto out;
	}

	for (;;) {
		int s;
		DEFINE_WAIT(wait);
		if (!cs_state_xfer_active(hi->data_state))
			goto out;
		if (signal_pending(current)) {
			r = -ERESTARTSYS;
			goto out;
		}
		/*
		 * prepare_to_wait must be called with hi->lock held
		 * so that callbacks can check for waitqueue_active()
		 */
		prepare_to_wait(&hi->datawait, &wait, TASK_INTERRUPTIBLE);
		spin_unlock_bh(&hi->lock);
		s = schedule_timeout(
			msecs_to_jiffies(CS_HSI_TRANSFER_TIMEOUT_MS));
		spin_lock_bh(&hi->lock);
		finish_wait(&hi->datawait, &wait);
		if (!s) {
			dev_dbg(&hi->cl->device,
				"hsi_data_sync timeout after %d ms\n",
				CS_HSI_TRANSFER_TIMEOUT_MS);
			r = -EIO;
			goto out;
		}
	}

out:
	spin_unlock_bh(&hi->lock);
	dev_dbg(&hi->cl->device, "hsi_data_sync done with res %d\n", r);

	return r;
}