static int qcom_slim_ngd_init_rx_msgq()

in qcom-ngd-ctrl.c [675:709]

• 30 lines of code
• 4 McCabe index (conditional complexity)

static int qcom_slim_ngd_init_rx_msgq(struct qcom_slim_ngd_ctrl *ctrl)
{
	struct device *dev = ctrl->dev;
	int ret, size;

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

	size = QCOM_SLIM_NGD_DESC_NUM * SLIM_MSGQ_BUF_LEN;
	ctrl->rx_base = dma_alloc_coherent(dev, size, &ctrl->rx_phys_base,
					   GFP_KERNEL);
	if (!ctrl->rx_base) {
		ret = -ENOMEM;
		goto rel_rx;
	}

	ret = qcom_slim_ngd_post_rx_msgq(ctrl);
	if (ret) {
		dev_err(dev, "post_rx_msgq() failed 0x%x\n", ret);
		goto rx_post_err;
	}

	return 0;

rx_post_err:
	dma_free_coherent(dev, size, ctrl->rx_base, ctrl->rx_phys_base);
rel_rx:
	dma_release_channel(ctrl->dma_rx_channel);
	return ret;
}