static void __init of_unittest_dma_ranges_one()

in unittest.c [893:939]

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

static void __init of_unittest_dma_ranges_one(const char *path,
		u64 expect_dma_addr, u64 expect_paddr)
{
#ifdef CONFIG_HAS_DMA
	struct device_node *np;
	const struct bus_dma_region *map = NULL;
	int rc;

	np = of_find_node_by_path(path);
	if (!np) {
		pr_err("missing testcase data\n");
		return;
	}

	rc = of_dma_get_range(np, &map);

	unittest(!rc, "of_dma_get_range failed on node %pOF rc=%i\n", np, rc);

	if (!rc) {
		phys_addr_t	paddr;
		dma_addr_t	dma_addr;
		struct device	*dev_bogus;

		dev_bogus = kzalloc(sizeof(struct device), GFP_KERNEL);
		if (!dev_bogus) {
			unittest(0, "kzalloc() failed\n");
			kfree(map);
			return;
		}

		dev_bogus->dma_range_map = map;
		paddr = dma_to_phys(dev_bogus, expect_dma_addr);
		dma_addr = phys_to_dma(dev_bogus, expect_paddr);

		unittest(paddr == expect_paddr,
			 "of_dma_get_range: wrong phys addr %pap (expecting %llx) on node %pOF\n",
			 &paddr, expect_paddr, np);
		unittest(dma_addr == expect_dma_addr,
			 "of_dma_get_range: wrong DMA addr %pad (expecting %llx) on node %pOF\n",
			 &dma_addr, expect_dma_addr, np);

		kfree(map);
		kfree(dev_bogus);
	}
	of_node_put(np);
#endif
}