static void hci_dma_cleanup()

in master/mipi-i3c-hci/dma.c [165:206]

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

static void hci_dma_cleanup(struct i3c_hci *hci)
{
	struct hci_rings_data *rings = hci->io_data;
	struct hci_rh_data *rh;
	unsigned int i;

	if (!rings)
		return;

	for (i = 0; i < rings->total; i++) {
		rh = &rings->headers[i];

		rh_reg_write(RING_CONTROL, 0);
		rh_reg_write(CR_SETUP, 0);
		rh_reg_write(IBI_SETUP, 0);
		rh_reg_write(INTR_SIGNAL_ENABLE, 0);

		if (rh->xfer)
			dma_free_coherent(&hci->master.dev,
					  rh->xfer_struct_sz * rh->xfer_entries,
					  rh->xfer, rh->xfer_dma);
		if (rh->resp)
			dma_free_coherent(&hci->master.dev,
					  rh->resp_struct_sz * rh->xfer_entries,
					  rh->resp, rh->resp_dma);
		kfree(rh->src_xfers);
		if (rh->ibi_status)
			dma_free_coherent(&hci->master.dev,
					  rh->ibi_status_sz * rh->ibi_status_entries,
					  rh->ibi_status, rh->ibi_status_dma);
		if (rh->ibi_data_dma)
			dma_unmap_single(&hci->master.dev, rh->ibi_data_dma,
					 rh->ibi_chunk_sz * rh->ibi_chunks_total,
					 DMA_FROM_DEVICE);
		kfree(rh->ibi_data);
	}

	rhs_reg_write(CONTROL, 0);

	kfree(rings);
	hci->io_data = NULL;
}