static int uio_dfl_probe()

in uio_dfl.c [14:45]

• 25 lines of code
• 3 McCabe index (conditional complexity)

static int uio_dfl_probe(struct dfl_device *ddev)
{
	struct resource *r = &ddev->mmio_res;
	struct device *dev = &ddev->dev;
	struct uio_info *uioinfo;
	struct uio_mem *uiomem;
	int ret;

	uioinfo = devm_kzalloc(dev, sizeof(struct uio_info), GFP_KERNEL);
	if (!uioinfo)
		return -ENOMEM;

	uioinfo->name = DRIVER_NAME;
	uioinfo->version = "0";

	uiomem = &uioinfo->mem[0];
	uiomem->memtype = UIO_MEM_PHYS;
	uiomem->addr = r->start & PAGE_MASK;
	uiomem->offs = r->start & ~PAGE_MASK;
	uiomem->size = (uiomem->offs + resource_size(r)
			+ PAGE_SIZE - 1) & PAGE_MASK;
	uiomem->name = r->name;

	/* Irq is yet to be supported */
	uioinfo->irq = UIO_IRQ_NONE;

	ret = devm_uio_register_device(dev, uioinfo);
	if (ret)
		dev_err(dev, "unable to register uio device\n");

	return ret;
}