static void tsi721_rio_unmap_inb_mem()

in devices/tsi721.c [1239:1293]

• 43 lines of code
• 12 McCabe index (conditional complexity)

static void tsi721_rio_unmap_inb_mem(struct rio_mport *mport,
				dma_addr_t lstart)
{
	struct tsi721_device *priv = mport->priv;
	struct tsi721_ib_win *ib_win;
	int i;

	tsi_debug(IBW, &priv->pdev->dev,
		"Unmap IBW mapped to PCIe_%pad", &lstart);

	/* Search for matching active inbound translation window */
	for (i = 0; i < TSI721_IBWIN_NUM; i++) {
		ib_win = &priv->ib_win[i];

		/* Address translating IBWs must to be an exact march */
		if (!ib_win->active ||
		    (ib_win->xlat && lstart != ib_win->lstart))
			continue;

		if (lstart >= ib_win->lstart &&
		    lstart < (ib_win->lstart + ib_win->size)) {

			if (!ib_win->xlat) {
				struct tsi721_ib_win_mapping *map;
				int found = 0;

				list_for_each_entry(map,
						    &ib_win->mappings, node) {
					if (map->lstart == lstart) {
						list_del(&map->node);
						kfree(map);
						found = 1;
						break;
					}
				}

				if (!found)
					continue;

				if (!list_empty(&ib_win->mappings))
					break;
			}

			tsi_debug(IBW, &priv->pdev->dev, "Disable IBWIN_%d", i);
			iowrite32(0, priv->regs + TSI721_IBWIN_LB(i));
			ib_win->active = false;
			priv->ibwin_cnt++;
			break;
		}
	}

	if (i == TSI721_IBWIN_NUM)
		tsi_debug(IBW, &priv->pdev->dev,
			"IB window mapped to %pad not found", &lstart);
}