i7core_edac: return -ENODEV if no MC is found

static int __devinit i7core_probe(struct pci_dev *pdev,

				  const struct pci_device_id *id)

{

	int rc;

	int rc, count = 0;

	struct i7core_dev *i7core_dev;

	/* get the pci devices we want to reserve for our use */

		goto fail0;

	list_for_each_entry(i7core_dev, &i7core_edac_list, list) {

		count++;

		rc = i7core_register_mci(i7core_dev);

		if (unlikely(rc < 0))

			goto fail1;

	}

	i7core_printk(KERN_INFO, "Driver loaded.\n");

	/*

	 * Nehalem-EX uses a different memory controller. However, as the

	 * memory controller is not visible on some Nehalem/Nehalem-EP, we

	 * need to indirectly probe via a X58 PCI device. The same devices

	 * are found on (some) Nehalem-EX. So, on those machines, the

	 * probe routine needs to return -ENODEV, as the actual Memory

	 * Controller registers won't be detected.

	 */

	if (!count) {

		rc = -ENODEV;

		goto fail1;

	}

	i7core_printk(KERN_INFO,

		      "Driver loaded, %d memory controller(s) found.\n",

		      count);

	mutex_unlock(&i7core_edac_lock);

	return 0;