static int qcom_slim_ngd_init_tx_msgq()

in qcom-ngd-ctrl.c [711:743]

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

static int qcom_slim_ngd_init_tx_msgq(struct qcom_slim_ngd_ctrl *ctrl)
{
	struct device *dev = ctrl->dev;
	unsigned long flags;
	int ret = 0;
	int size;

	ctrl->dma_tx_channel = dma_request_chan(dev, "tx");
	if (IS_ERR(ctrl->dma_tx_channel)) {
		dev_err(dev, "Failed to request TX dma channel");
		ret = PTR_ERR(ctrl->dma_tx_channel);
		ctrl->dma_tx_channel = NULL;
		return ret;
	}

	size = ((QCOM_SLIM_NGD_DESC_NUM + 1) * SLIM_MSGQ_BUF_LEN);
	ctrl->tx_base = dma_alloc_coherent(dev, size, &ctrl->tx_phys_base,
					   GFP_KERNEL);
	if (!ctrl->tx_base) {
		ret = -EINVAL;
		goto rel_tx;
	}

	spin_lock_irqsave(&ctrl->tx_buf_lock, flags);
	ctrl->tx_tail = 0;
	ctrl->tx_head = 0;
	spin_unlock_irqrestore(&ctrl->tx_buf_lock, flags);

	return 0;
rel_tx:
	dma_release_channel(ctrl->dma_tx_channel);
	return ret;
}