From 4055759145b421537207ed0d034041f1774ab41d Mon Sep 17 00:00:00 2001 From: Mauro Carvalho Chehab Date: Tue, 30 Nov 2010 08:14:30 -0200 Subject: [PATCH] i7core_edac: return -ENODEV if no MC is found 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. Signed-off-by: Mauro Carvalho Chehab --- drivers/edac/i7core_edac.c | 20 ++++++++++++++++++-- 1 file changed, 18 insertions(+), 2 deletions(-) diff --git a/drivers/edac/i7core_edac.c b/drivers/edac/i7core_edac.c index 304f550..6ae7795 100644 --- a/drivers/edac/i7core_edac.c +++ b/drivers/edac/i7core_edac.c @@ -2226,7 +2226,7 @@ fail0: 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 */ @@ -2246,12 +2246,28 @@ static int __devinit i7core_probe(struct pci_dev *pdev, 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; -- 2.7.4