i7core: fix get_devices routine for Xeon55xx

i7core_get_devices() were preparet to get just the first found device of each type.
Due to that, on Xeon 55xx, only socket 1 were retrived.

Rework i7core_get_devices() to clean it and to properly support Xeon 55xx.

While here, fix a small typo.

Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

1 files changed, 108 insertions, 78 deletions

diff --git a/drivers/edac/i7core_edac.c b/drivers/edac/i7core_edac.c
index 9f39d3d5502..79636b58ec5 100644
--- a/drivers/edac/i7core_edac.c
+++ b/drivers/edac/i7core_edac.c
@@ -410,7 +410,7 @@ static int i7core_get_active_channels(u8 socket, unsigned *channels,
                 }
         }
 
-        debugf0("Number of active channels on socked %d: %d\n",
+        debugf0("Number of active channels on socket %d: %d\n",
                 socket, *channels);
 
         return 0;
@@ -1126,107 +1126,137 @@ static void i7core_put_devices(void)
  *
  *                      Need to 'get' device 16 func 1 and func 2
  */
-static int i7core_get_devices(void)
+int i7core_get_onedevice(struct pci_dev **prev, int devno)
 {
-        int rc, i;
         struct pci_dev *pdev = NULL;
         u8 bus = 0;
         u8 socket = 0;
 
-        for (i = 0; i < N_DEVS; i++) {
+        pdev = pci_get_device(PCI_VENDOR_ID_INTEL,
+                              pci_devs[devno].dev_id, *prev);
+
+        /*
+         * On Xeon 55xx, the Intel Quckpath Arch Generic Non-core pci buses
+         * aren't announced by acpi. So, we need to use a legacy scan probing
+         * to detect them
+         */
+        if (unlikely(!pdev && !devno && !prev)) {
+                pcibios_scan_specific_bus(254);
+                pcibios_scan_specific_bus(255);
+
                 pdev = pci_get_device(PCI_VENDOR_ID_INTEL,
-                                        pci_devs[i].dev_id, NULL);
+                                      pci_devs[devno].dev_id, *prev);
+        }
 
-                if (!pdev && !i) {
-                        pcibios_scan_specific_bus(254);
-                        pcibios_scan_specific_bus(255);
+        /*
+         * On Xeon 55xx, the Intel Quckpath Arch Generic Non-core regs
+         * is at addr 8086:2c40, instead of 8086:2c41. So, we need
+         * to probe for the alternate address in case of failure
+         */
+        if (pci_devs[devno].dev_id == PCI_DEVICE_ID_INTEL_I7_NOCORE && !pdev)
+                pdev = pci_get_device(PCI_VENDOR_ID_INTEL,
+                                      PCI_DEVICE_ID_INTEL_I7_NOCORE_ALT, *prev);
 
-                        pdev = pci_get_device(PCI_VENDOR_ID_INTEL,
-                                                pci_devs[i].dev_id, NULL);
+        if (!pdev) {
+                if (*prev) {
+                        *prev = pdev;
+                        return 0;
                 }
 
                 /*
-                 * On Xeon 55xx, the Intel Quckpath Arch Generic Non-core regs
-                 * is at addr 8086:2c40, instead of 8086:2c41. So, we need
-                 * to probe for the alternate address in case of failure
+                 * Dev 3 function 2 only exists on chips with RDIMMs
+                 * so, it is ok to not found it
                  */
-                if (pci_devs[i].dev_id == PCI_DEVICE_ID_INTEL_I7_NOCORE
-                                                                    && !pdev)
-                        pdev = pci_get_device(PCI_VENDOR_ID_INTEL,
-                                PCI_DEVICE_ID_INTEL_I7_NOCORE_ALT, NULL);
+                if ((pci_devs[devno].dev == 3) && (pci_devs[devno].func == 2)) {
+                        *prev = pdev;
+                        return 0;
+                }
 
-                if (likely(pdev)) {
-                        bus = pdev->bus->number;
+                i7core_printk(KERN_ERR,
+                        "Device not found: dev %02x.%d PCI ID %04x:%04x\n",
+                        pci_devs[devno].dev, pci_devs[devno].func,
+                        PCI_VENDOR_ID_INTEL, pci_devs[devno].dev_id);
 
-                        if (bus == 0x3f)
-                                socket = 0;
-                        else
-                                socket = 255 - bus;
+                /* End of list, leave */
+                return -ENODEV;
+        }
+        bus = pdev->bus->number;
 
-                        if (socket >= NUM_SOCKETS) {
-                                i7core_printk(KERN_ERR,
-                                        "Found unexpected socket for "
-                                        "dev %02x:%02x.%d PCI ID %04x:%04x\n",
-                                        bus, pci_devs[i].dev, pci_devs[i].func,
-                                        PCI_VENDOR_ID_INTEL, pci_devs[i].dev_id);
+        if (bus == 0x3f)
+                socket = 0;
+        else
+                socket = 255 - bus;
+
+        if (socket >= NUM_SOCKETS) {
+                i7core_printk(KERN_ERR,
+                        "Unexpected socket for "
+                        "dev %02x:%02x.%d PCI ID %04x:%04x\n",
+                        bus, pci_devs[devno].dev, pci_devs[devno].func,
+                        PCI_VENDOR_ID_INTEL, pci_devs[devno].dev_id);
+                pci_dev_put(pdev);
+                return -ENODEV;
+        }
 
-                                rc = -ENODEV;
-                                goto error;
-                        }
+        if (pci_devs[devno].pdev[socket]) {
+                i7core_printk(KERN_ERR,
+                        "Duplicated device for "
+                        "dev %02x:%02x.%d PCI ID %04x:%04x\n",
+                        bus, pci_devs[devno].dev, pci_devs[devno].func,
+                        PCI_VENDOR_ID_INTEL, pci_devs[devno].dev_id);
+                pci_dev_put(pdev);
+                return -ENODEV;
+        }
 
-                        pci_devs[i].pdev[socket] = pdev;
-                } else {
-                        i7core_printk(KERN_ERR,
-                                "Device not found: "
-                                "dev %02x:%02x.%d PCI ID %04x:%04x\n",
-                                bus, pci_devs[i].dev, pci_devs[i].func,
-                                PCI_VENDOR_ID_INTEL, pci_devs[i].dev_id);
+        pci_devs[devno].pdev[socket] = pdev;
+
+        /* Sanity check */
+        if (unlikely(PCI_SLOT(pdev->devfn) != pci_devs[devno].dev ||
+                        PCI_FUNC(pdev->devfn) != pci_devs[devno].func)) {
+                i7core_printk(KERN_ERR,
+                        "Device PCI ID %04x:%04x "
+                        "has dev %02x:%02x.%d instead of dev %02x:%02x.%d\n",
+                        PCI_VENDOR_ID_INTEL, pci_devs[devno].dev_id,
+                        bus, PCI_SLOT(pdev->devfn), PCI_FUNC(pdev->devfn),
+                        bus, pci_devs[devno].dev, pci_devs[devno].func);
+                return -ENODEV;
+        }
 
-                        /* Dev 3 function 2 only exists on chips with RDIMMs */
-                        if ((pci_devs[i].dev == 3) && (pci_devs[i].func == 2))
-                                continue;
+        /* Be sure that the device is enabled */
+        if (unlikely(pci_enable_device(pdev) < 0)) {
+                i7core_printk(KERN_ERR,
+                        "Couldn't enable "
+                        "dev %02x:%02x.%d PCI ID %04x:%04x\n",
+                        bus, pci_devs[devno].dev, pci_devs[devno].func,
+                        PCI_VENDOR_ID_INTEL, pci_devs[devno].dev_id);
+                return -ENODEV;
+        }
 
-                        /* End of list, leave */
-                        rc = -ENODEV;
-                        goto error;
-                }
+        i7core_printk(KERN_INFO,
+                        "Registered socket %d "
+                        "dev %02x:%02x.%d PCI ID %04x:%04x\n",
+                        socket, bus, pci_devs[devno].dev, pci_devs[devno].func,
+                        PCI_VENDOR_ID_INTEL, pci_devs[devno].dev_id);
 
-                /* Sanity check */
-                if (unlikely(PCI_SLOT(pdev->devfn) != pci_devs[i].dev ||
-                             PCI_FUNC(pdev->devfn) != pci_devs[i].func)) {
-                        i7core_printk(KERN_ERR,
-                                "Device PCI ID %04x:%04x "
-                                "has fn %d.%d instead of fn %d.%d\n",
-                                PCI_VENDOR_ID_INTEL, pci_devs[i].dev_id,
-                                PCI_SLOT(pdev->devfn), PCI_FUNC(pdev->devfn),
-                                pci_devs[i].dev, pci_devs[i].func);
-                        rc = -EINVAL;
-                        goto error;
-                }
+        *prev = pdev;
 
-                /* Be sure that the device is enabled */
-                rc = pci_enable_device(pdev);
-                if (unlikely(rc < 0)) {
-                        i7core_printk(KERN_ERR,
-                                "Couldn't enable PCI ID %04x:%04x "
-                                "fn %d.%d\n",
-                                PCI_VENDOR_ID_INTEL, pci_devs[i].dev_id,
-                                PCI_SLOT(pdev->devfn), PCI_FUNC(pdev->devfn));
-                        goto error;
-                }
+        return 0;
+}
 
-                i7core_printk(KERN_INFO,
-                                "Registered socket %d "
-                                "dev %02x:%02x.%d PCI ID %04x:%04x\n",
-                                socket, bus, pci_devs[i].dev, pci_devs[i].func,
-                                PCI_VENDOR_ID_INTEL, pci_devs[i].dev_id);
-        }
+static int i7core_get_devices(void)
+{
+        int i;
+        struct pci_dev *pdev = NULL;
 
+        for (i = 0; i < N_DEVS; i++) {
+                pdev = NULL;
+                do {
+                        if (i7core_get_onedevice(&pdev, i) < 0) {
+                                i7core_put_devices();
+                                return -ENODEV;
+                        }
+                } while (pdev);
+        }
         return 0;
-
-error:
-        i7core_put_devices();
-        return -EINVAL;
 }
 
 static int mci_bind_devs(struct mem_ctl_info *mci)