static void __init isa_probe()

in i82365.c [753:827]

• 66 lines of code
• 26 McCabe index (conditional complexity)

static void __init isa_probe(void)
{
    int i, j, sock, k, ns, id;
    unsigned int port;
#ifdef CONFIG_PNP
    struct isapnp_device_id *devid;
    struct pnp_dev *dev;

    for (devid = id_table; devid->vendor; devid++) {
	if ((dev = pnp_find_dev(NULL, devid->vendor, devid->function, NULL))) {
	
	    if (pnp_device_attach(dev) < 0)
	    	continue;

	    if (pnp_activate_dev(dev) < 0) {
		printk("activate failed\n");
		pnp_device_detach(dev);
		break;
	    }

	    if (!pnp_port_valid(dev, 0)) {
		printk("invalid resources ?\n");
		pnp_device_detach(dev);
		break;
	    }
	    i365_base = pnp_port_start(dev, 0);
	    i82365_pnpdev = dev;
	    break;
	}
    }
#endif

    if (!request_region(i365_base, 2, "i82365")) {
	if (sockets == 0)
	    printk("port conflict at %#lx\n", i365_base);
	return;
    }

    id = identify(i365_base, 0);
    if ((id == IS_I82365DF) && (identify(i365_base, 1) != id)) {
	for (i = 0; i < 4; i++) {
	    if (i == ignore) continue;
	    port = i365_base + ((i & 1) << 2) + ((i & 2) << 1);
	    sock = (i & 1) << 1;
	    if (identify(port, sock) == IS_I82365DF) {
		add_socket(port, sock, IS_VLSI);
		add_pcic(1, IS_VLSI);
	    }
	}
    } else {
	for (i = 0; i < 8; i += 2) {
	    if (sockets && !extra_sockets && (i == 4))
		break;
	    port = i365_base + 2*(i>>2);
	    sock = (i & 3);
	    id = identify(port, sock);
	    if (id < 0) continue;

	    for (j = ns = 0; j < 2; j++) {
		/* Does the socket exist? */
		if ((ignore == i+j) || (identify(port, sock+j) < 0))
		    continue;
		/* Check for bad socket decode */
		for (k = 0; k <= sockets; k++)
		    i365_set(k, I365_MEM(0)+I365_W_OFF, k);
		for (k = 0; k <= sockets; k++)
		    if (i365_get(k, I365_MEM(0)+I365_W_OFF) != k)
			break;
		if (k <= sockets) break;
		add_socket(port, sock+j, id); ns++;
	    }
	    if (ns != 0) add_pcic(ns, id);
	}
    }
}