C++ (Cpp) VMM_IS_ERR Examples

Example #1

File: clk-bulk.c Project: avpatel/xvisor-next

int clk_bulk_get(struct vmm_device *dev, int num_clks,
		 struct clk_bulk_data *clks)
{
	int ret;
	int i;

	for (i = 0; i < num_clks; i++)
		clks[i].clk = NULL;

	for (i = 0; i < num_clks; i++) {
		clks[i].clk = clk_get(dev, clks[i].id);
		if (VMM_IS_ERR(clks[i].clk)) {
			ret = VMM_PTR_ERR(clks[i].clk);
			vmm_lerror(dev->name, "Failed to get clk '%s': %d\n",
				   clks[i].id, ret);
			clks[i].clk = NULL;
			goto err;
		}
	}

	return 0;

err:
	clk_bulk_put(i, clks);

	return ret;
}

Example #2

File: sram.c Project: alessandrodn/xvisor-next

static int sram_probe(struct vmm_device *dev,
		      const struct vmm_devtree_nodeid *nodeid)
{
	void *virt_base = NULL;
	struct sram_dev *sram = NULL;
	physical_addr_t start = 0;
	virtual_size_t size = 0;
	int ret = VMM_OK;

	ret = vmm_devtree_regaddr(dev->of_node, &start, 0);
	if (VMM_OK != ret) {
		vmm_printf("%s: Failed to get device base\n", dev->name);
		return ret;
	}

	ret = vmm_devtree_regsize(dev->of_node, &size, 0);
	if (VMM_OK != ret) {
		vmm_printf("%s: Failed to get device size\n", dev->name);
		goto err_out;
	}

	virt_base = (void *)vmm_host_iomap(start, size);
	if (NULL == virt_base) {
		vmm_printf("%s: Failed to get remap memory\n", dev->name);
		ret = VMM_ENOMEM;
		goto err_out;
	}

	sram = vmm_devm_zalloc(dev, sizeof(*sram));
	if (!sram) {
		vmm_printf("%s: Failed to allocate structure\n", dev->name);
		ret = VMM_ENOMEM;
		goto err_out;
	}

	sram->clk = devm_clk_get(dev, NULL);
	if (VMM_IS_ERR(sram->clk))
		sram->clk = NULL;
	else
		clk_prepare_enable(sram->clk);

	sram->pool = devm_gen_pool_create(dev, SRAM_GRANULARITY_LOG);
	if (!sram->pool) {
		vmm_printf("%s: Failed to create memory pool\n", dev->name);
		ret = VMM_ENOMEM;
	}

	ret = gen_pool_add_virt(sram->pool, (unsigned long)virt_base,
				start, size);
	if (ret < 0) {
		vmm_printf("%s: Failed to add memory chunk\n", dev->name);
		goto err_out;
	}

	vmm_devdrv_set_data(dev, sram);

	vmm_printf("%s: SRAM pool: %ld KiB @ 0x%p\n", dev->name, size / 1024,
		   virt_base);

	return 0;

err_out:
	if (sram->pool)
		gen_pool_destroy(sram->pool);

#if 0
	if (sram->clk)
		clk_disable_unprepare(sram->clk);
#endif /* 0 */

	if (sram)
		vmm_free(sram);
	sram = NULL;

	if (virt_base)
		vmm_host_iounmap((virtual_addr_t)virt_base);
	virt_base = NULL;

	return ret;
}