11 files changed, 247 insertions, 132 deletions

diff --git a/arch/powerpc/kernel/cputable.c b/arch/powerpc/kernel/cputable.c
index 2a45d0f04385..22973a74df73 100644
--- a/arch/powerpc/kernel/cputable.c
+++ b/arch/powerpc/kernel/cputable.c
@@ -494,9 +494,27 @@ static struct cpu_spec __initdata cpu_specs[] = {
                 .cpu_restore            = __restore_cpu_power7,
                 .platform               = "power7+",
         },
-        {       /* Power8 */
+        {       /* Power8E */
                 .pvr_mask               = 0xffff0000,
                 .pvr_value              = 0x004b0000,
+                .cpu_name               = "POWER8E (raw)",
+                .cpu_features           = CPU_FTRS_POWER8,
+                .cpu_user_features      = COMMON_USER_POWER8,
+                .cpu_user_features2     = COMMON_USER2_POWER8,
+                .mmu_features           = MMU_FTRS_POWER8,
+                .icache_bsize           = 128,
+                .dcache_bsize           = 128,
+                .num_pmcs               = 6,
+                .pmc_type               = PPC_PMC_IBM,
+                .oprofile_cpu_type      = "ppc64/power8",
+                .oprofile_type          = PPC_OPROFILE_INVALID,
+                .cpu_setup              = __setup_cpu_power8,
+                .cpu_restore            = __restore_cpu_power8,
+                .platform               = "power8",
+        },
+        {       /* Power8 */
+                .pvr_mask               = 0xffff0000,
+                .pvr_value              = 0x004d0000,
                 .cpu_name               = "POWER8 (raw)",
                 .cpu_features           = CPU_FTRS_POWER8,
                 .cpu_user_features      = COMMON_USER_POWER8,
diff --git a/arch/powerpc/kernel/eeh.c b/arch/powerpc/kernel/eeh.c
index 39954fe941b8..ea9414c8088d 100644
--- a/arch/powerpc/kernel/eeh.c
+++ b/arch/powerpc/kernel/eeh.c
@@ -231,7 +231,7 @@ static size_t eeh_gather_pci_data(struct eeh_dev *edev, char * buf, size_t len)
 void eeh_slot_error_detail(struct eeh_pe *pe, int severity)
 {
         size_t loglen = 0;
-        struct eeh_dev *edev;
+        struct eeh_dev *edev, *tmp;
         bool valid_cfg_log = true;
 
         /*
@@ -251,7 +251,7 @@ void eeh_slot_error_detail(struct eeh_pe *pe, int severity)
                 eeh_pe_restore_bars(pe);
 
                 pci_regs_buf[0] = 0;
-                eeh_pe_for_each_dev(pe, edev) {
+                eeh_pe_for_each_dev(pe, edev, tmp) {
                         loglen += eeh_gather_pci_data(edev, pci_regs_buf + loglen,
                                                       EEH_PCI_REGS_LOG_LEN - loglen);
                 }
@@ -499,8 +499,6 @@ unsigned long eeh_check_failure(const volatile void __iomem *token, unsigned lon
         }
 
         eeh_dev_check_failure(edev);
-
-        pci_dev_put(eeh_dev_to_pci_dev(edev));
         return val;
 }
 
@@ -838,7 +836,7 @@ core_initcall_sync(eeh_init);
  * on the CEC architecture, type of the device, on earlier boot
  * command-line arguments & etc.
  */
-static void eeh_add_device_early(struct device_node *dn)
+void eeh_add_device_early(struct device_node *dn)
 {
         struct pci_controller *phb;
 
@@ -886,7 +884,7 @@ EXPORT_SYMBOL_GPL(eeh_add_device_tree_early);
  * This routine must be used to complete EEH initialization for PCI
  * devices that were added after system boot (e.g. hotplug, dlpar).
  */
-static void eeh_add_device_late(struct pci_dev *dev)
+void eeh_add_device_late(struct pci_dev *dev)
 {
         struct device_node *dn;
         struct eeh_dev *edev;
@@ -902,9 +900,23 @@ static void eeh_add_device_late(struct pci_dev *dev)
                 pr_debug("EEH: Already referenced !\n");
                 return;
         }
-        WARN_ON(edev->pdev);
 
-        pci_dev_get(dev);
+        /*
+         * The EEH cache might not be removed correctly because of
+         * unbalanced kref to the device during unplug time, which
+         * relies on pcibios_release_device(). So we have to remove
+         * that here explicitly.
+         */
+        if (edev->pdev) {
+                eeh_rmv_from_parent_pe(edev);
+                eeh_addr_cache_rmv_dev(edev->pdev);
+                eeh_sysfs_remove_device(edev->pdev);
+                edev->mode &= ~EEH_DEV_SYSFS;
+
+                edev->pdev = NULL;
+                dev->dev.archdata.edev = NULL;
+        }
+
         edev->pdev = dev;
         dev->dev.archdata.edev = edev;
 
@@ -967,7 +979,6 @@ EXPORT_SYMBOL_GPL(eeh_add_sysfs_files);
 /**
  * eeh_remove_device - Undo EEH setup for the indicated pci device
  * @dev: pci device to be removed
- * @purge_pe: remove the PE or not
  *
  * This routine should be called when a device is removed from
  * a running system (e.g. by hotplug or dlpar).  It unregisters
@@ -975,7 +986,7 @@ EXPORT_SYMBOL_GPL(eeh_add_sysfs_files);
  * this device will no longer be detected after this call; thus,
  * i/o errors affecting this slot may leave this device unusable.
  */
-static void eeh_remove_device(struct pci_dev *dev, int purge_pe)
+void eeh_remove_device(struct pci_dev *dev)
 {
         struct eeh_dev *edev;
 
@@ -986,42 +997,29 @@ static void eeh_remove_device(struct pci_dev *dev, int purge_pe)
         /* Unregister the device with the EEH/PCI address search system */
         pr_debug("EEH: Removing device %s\n", pci_name(dev));
 
-        if (!edev || !edev->pdev) {
+        if (!edev || !edev->pdev || !edev->pe) {
                 pr_debug("EEH: Not referenced !\n");
                 return;
         }
+
+        /*
+         * During the hotplug for EEH error recovery, we need the EEH
+         * device attached to the parent PE in order for BAR restore
+         * a bit later. So we keep it for BAR restore and remove it
+         * from the parent PE during the BAR resotre.
+         */
         edev->pdev = NULL;
         dev->dev.archdata.edev = NULL;
-        pci_dev_put(dev);
+        if (!(edev->pe->state & EEH_PE_KEEP))
+                eeh_rmv_from_parent_pe(edev);
+        else
+                edev->mode |= EEH_DEV_DISCONNECTED;
 
-        eeh_rmv_from_parent_pe(edev, purge_pe);
         eeh_addr_cache_rmv_dev(dev);
         eeh_sysfs_remove_device(dev);
+        edev->mode &= ~EEH_DEV_SYSFS;
 }
 
-/**
- * eeh_remove_bus_device - Undo EEH setup for the indicated PCI device
- * @dev: PCI device
- * @purge_pe: remove the corresponding PE or not
- *
- * This routine must be called when a device is removed from the
- * running system through hotplug or dlpar. The corresponding
- * PCI address cache will be removed.
- */
-void eeh_remove_bus_device(struct pci_dev *dev, int purge_pe)
-{
-        struct pci_bus *bus = dev->subordinate;
-        struct pci_dev *child, *tmp;
-
-        eeh_remove_device(dev, purge_pe);
-
-        if (bus && dev->hdr_type == PCI_HEADER_TYPE_BRIDGE) {
-                list_for_each_entry_safe(child, tmp, &bus->devices, bus_list)
-                         eeh_remove_bus_device(child, purge_pe);
-        }
-}
-EXPORT_SYMBOL_GPL(eeh_remove_bus_device);
-
 static int proc_eeh_show(struct seq_file *m, void *v)
 {
         if (0 == eeh_subsystem_enabled) {
diff --git a/arch/powerpc/kernel/eeh_cache.c b/arch/powerpc/kernel/eeh_cache.c
index f9ac1232a746..e8c9fd546a5c 100644
--- a/arch/powerpc/kernel/eeh_cache.c
+++ b/arch/powerpc/kernel/eeh_cache.c
@@ -68,16 +68,12 @@ static inline struct eeh_dev *__eeh_addr_cache_get_device(unsigned long addr)
                 struct pci_io_addr_range *piar;
                 piar = rb_entry(n, struct pci_io_addr_range, rb_node);
 
-                if (addr < piar->addr_lo) {
+                if (addr < piar->addr_lo)
                         n = n->rb_left;
-                } else {
-                        if (addr > piar->addr_hi) {
-                                n = n->rb_right;
-                        } else {
-                                pci_dev_get(piar->pcidev);
-                                return piar->edev;
-                        }
-                }
+                else if (addr > piar->addr_hi)
+                        n = n->rb_right;
+                else
+                        return piar->edev;
         }
 
         return NULL;
@@ -156,7 +152,6 @@ eeh_addr_cache_insert(struct pci_dev *dev, unsigned long alo,
         if (!piar)
                 return NULL;
 
-        pci_dev_get(dev);
         piar->addr_lo = alo;
         piar->addr_hi = ahi;
         piar->edev = pci_dev_to_eeh_dev(dev);
@@ -250,7 +245,6 @@ restart:
 
                 if (piar->pcidev == dev) {
                         rb_erase(n, &pci_io_addr_cache_root.rb_root);
-                        pci_dev_put(piar->pcidev);
                         kfree(piar);
                         goto restart;
                 }
@@ -302,12 +296,10 @@ void eeh_addr_cache_build(void)
                 if (!edev)
                         continue;
 
-                pci_dev_get(dev);  /* matching put is in eeh_remove_device() */
                 dev->dev.archdata.edev = edev;
                 edev->pdev = dev;
 
                 eeh_addr_cache_insert_dev(dev);
-
                 eeh_sysfs_add_device(dev);
         }
 
diff --git a/arch/powerpc/kernel/eeh_driver.c b/arch/powerpc/kernel/eeh_driver.c
index 2b1ce17cae50..36bed5a12750 100644
--- a/arch/powerpc/kernel/eeh_driver.c
+++ b/arch/powerpc/kernel/eeh_driver.c
@@ -143,10 +143,14 @@ static void eeh_disable_irq(struct pci_dev *dev)
 static void eeh_enable_irq(struct pci_dev *dev)
 {
         struct eeh_dev *edev = pci_dev_to_eeh_dev(dev);
+        struct irq_desc *desc;
 
         if ((edev->mode) & EEH_DEV_IRQ_DISABLED) {
                 edev->mode &= ~EEH_DEV_IRQ_DISABLED;
-                enable_irq(dev->irq);
+
+                desc = irq_to_desc(dev->irq);
+                if (desc && desc->depth > 0)
+                        enable_irq(dev->irq);
         }
 }
 
@@ -338,6 +342,54 @@ static void *eeh_report_failure(void *data, void *userdata)
         return NULL;
 }
 
+static void *eeh_rmv_device(void *data, void *userdata)
+{
+        struct pci_driver *driver;
+        struct eeh_dev *edev = (struct eeh_dev *)data;
+        struct pci_dev *dev = eeh_dev_to_pci_dev(edev);
+        int *removed = (int *)userdata;
+
+        /*
+         * Actually, we should remove the PCI bridges as well.
+         * However, that's lots of complexity to do that,
+         * particularly some of devices under the bridge might
+         * support EEH. So we just care about PCI devices for
+         * simplicity here.
+         */
+        if (!dev || (dev->hdr_type & PCI_HEADER_TYPE_BRIDGE))
+                return NULL;
+        driver = eeh_pcid_get(dev);
+        if (driver && driver->err_handler)
+                return NULL;
+
+        /* Remove it from PCI subsystem */
+        pr_debug("EEH: Removing %s without EEH sensitive driver\n",
+                 pci_name(dev));
+        edev->bus = dev->bus;
+        edev->mode |= EEH_DEV_DISCONNECTED;
+        (*removed)++;
+
+        pci_stop_and_remove_bus_device(dev);
+
+        return NULL;
+}
+
+static void *eeh_pe_detach_dev(void *data, void *userdata)
+{
+        struct eeh_pe *pe = (struct eeh_pe *)data;
+        struct eeh_dev *edev, *tmp;
+
+        eeh_pe_for_each_dev(pe, edev, tmp) {
+                if (!(edev->mode & EEH_DEV_DISCONNECTED))
+                        continue;
+
+                edev->mode &= ~(EEH_DEV_DISCONNECTED | EEH_DEV_IRQ_DISABLED);
+                eeh_rmv_from_parent_pe(edev);
+        }
+
+        return NULL;
+}
+
 /**
  * eeh_reset_device - Perform actual reset of a pci slot
  * @pe: EEH PE
@@ -349,8 +401,9 @@ static void *eeh_report_failure(void *data, void *userdata)
  */
 static int eeh_reset_device(struct eeh_pe *pe, struct pci_bus *bus)
 {
+        struct pci_bus *frozen_bus = eeh_pe_bus_get(pe);
         struct timeval tstamp;
-        int cnt, rc;
+        int cnt, rc, removed = 0;
 
         /* pcibios will clear the counter; save the value */
         cnt = pe->freeze_count;
@@ -362,8 +415,11 @@ static int eeh_reset_device(struct eeh_pe *pe, struct pci_bus *bus)
          * devices are expected to be attached soon when calling
          * into pcibios_add_pci_devices().
          */
+        eeh_pe_state_mark(pe, EEH_PE_KEEP);
         if (bus)
-                __pcibios_remove_pci_devices(bus, 0);
+                pcibios_remove_pci_devices(bus);
+        else if (frozen_bus)
+                eeh_pe_dev_traverse(pe, eeh_rmv_device, &removed);
 
         /* Reset the pci controller. (Asserts RST#; resets config space).
          * Reconfigure bridges and devices. Don't try to bring the system
@@ -384,9 +440,24 @@ static int eeh_reset_device(struct eeh_pe *pe, struct pci_bus *bus)
          * potentially weird things happen.
          */
         if (bus) {
+                pr_info("EEH: Sleep 5s ahead of complete hotplug\n");
                 ssleep(5);
+
+                /*
+                 * The EEH device is still connected with its parent
+                 * PE. We should disconnect it so the binding can be
+                 * rebuilt when adding PCI devices.
+                 */
+                eeh_pe_traverse(pe, eeh_pe_detach_dev, NULL);
                 pcibios_add_pci_devices(bus);
+        } else if (frozen_bus && removed) {
+                pr_info("EEH: Sleep 5s ahead of partial hotplug\n");
+                ssleep(5);
+
+                eeh_pe_traverse(pe, eeh_pe_detach_dev, NULL);
+                pcibios_add_pci_devices(frozen_bus);
         }
+        eeh_pe_state_clear(pe, EEH_PE_KEEP);
 
         pe->tstamp = tstamp;
         pe->freeze_count = cnt;
diff --git a/arch/powerpc/kernel/eeh_pe.c b/arch/powerpc/kernel/eeh_pe.c
index 016588a6f5ed..f9450537e335 100644
--- a/arch/powerpc/kernel/eeh_pe.c
+++ b/arch/powerpc/kernel/eeh_pe.c
@@ -149,8 +149,8 @@ static struct eeh_pe *eeh_pe_next(struct eeh_pe *pe,
  * callback returns something other than NULL, or no more PEs
  * to be traversed.
  */
-static void *eeh_pe_traverse(struct eeh_pe *root,
-                        eeh_traverse_func fn, void *flag)
+void *eeh_pe_traverse(struct eeh_pe *root,
+                      eeh_traverse_func fn, void *flag)
 {
         struct eeh_pe *pe;
         void *ret;
@@ -176,7 +176,7 @@ void *eeh_pe_dev_traverse(struct eeh_pe *root,
                 eeh_traverse_func fn, void *flag)
 {
         struct eeh_pe *pe;
-        struct eeh_dev *edev;
+        struct eeh_dev *edev, *tmp;
         void *ret;
 
         if (!root) {
@@ -186,7 +186,7 @@ void *eeh_pe_dev_traverse(struct eeh_pe *root,
 
         /* Traverse root PE */
         for (pe = root; pe; pe = eeh_pe_next(pe, root)) {
-                eeh_pe_for_each_dev(pe, edev) {
+                eeh_pe_for_each_dev(pe, edev, tmp) {
                         ret = fn(edev, flag);
                         if (ret)
                                 return ret;
@@ -333,7 +333,7 @@ int eeh_add_to_parent_pe(struct eeh_dev *edev)
                 while (parent) {
                         if (!(parent->type & EEH_PE_INVALID))
                                 break;
-                        parent->type &= ~EEH_PE_INVALID;
+                        parent->type &= ~(EEH_PE_INVALID | EEH_PE_KEEP);
                         parent = parent->parent;
                 }
                 pr_debug("EEH: Add %s to Device PE#%x, Parent PE#%x\n",
@@ -397,21 +397,20 @@ int eeh_add_to_parent_pe(struct eeh_dev *edev)
 /**
  * eeh_rmv_from_parent_pe - Remove one EEH device from the associated PE
  * @edev: EEH device
- * @purge_pe: remove PE or not
  *
  * The PE hierarchy tree might be changed when doing PCI hotplug.
  * Also, the PCI devices or buses could be removed from the system
  * during EEH recovery. So we have to call the function remove the
  * corresponding PE accordingly if necessary.
  */
-int eeh_rmv_from_parent_pe(struct eeh_dev *edev, int purge_pe)
+int eeh_rmv_from_parent_pe(struct eeh_dev *edev)
 {
         struct eeh_pe *pe, *parent, *child;
         int cnt;
 
         if (!edev->pe) {
-                pr_warning("%s: No PE found for EEH device %s\n",
-                        __func__, edev->dn->full_name);
+                pr_debug("%s: No PE found for EEH device %s\n",
+                         __func__, edev->dn->full_name);
                 return -EEXIST;
         }
 
@@ -431,7 +430,7 @@ int eeh_rmv_from_parent_pe(struct eeh_dev *edev, int purge_pe)
                 if (pe->type & EEH_PE_PHB)
                         break;
 
-                if (purge_pe) {
+                if (!(pe->state & EEH_PE_KEEP)) {
                         if (list_empty(&pe->edevs) &&
                             list_empty(&pe->child_list)) {
                                 list_del(&pe->child);
@@ -502,7 +501,7 @@ static void *__eeh_pe_state_mark(void *data, void *flag)
 {
         struct eeh_pe *pe = (struct eeh_pe *)data;
         int state = *((int *)flag);
-        struct eeh_dev *tmp;
+        struct eeh_dev *edev, *tmp;
         struct pci_dev *pdev;
 
         /*
@@ -512,8 +511,8 @@ static void *__eeh_pe_state_mark(void *data, void *flag)
          * the PCI device driver.
          */
         pe->state |= state;
-        eeh_pe_for_each_dev(pe, tmp) {
-                pdev = eeh_dev_to_pci_dev(tmp);
+        eeh_pe_for_each_dev(pe, edev, tmp) {
+                pdev = eeh_dev_to_pci_dev(edev);
                 if (pdev)
                         pdev->error_state = pci_channel_io_frozen;
         }
@@ -579,7 +578,7 @@ void eeh_pe_state_clear(struct eeh_pe *pe, int state)
  * blocked on normal path during the stage. So we need utilize
  * eeh operations, which is always permitted.
  */
-static void eeh_bridge_check_link(struct pci_dev *pdev,
+static void eeh_bridge_check_link(struct eeh_dev *edev,
                                   struct device_node *dn)
 {
         int cap;
@@ -590,16 +589,17 @@ static void eeh_bridge_check_link(struct pci_dev *pdev,
          * We only check root port and downstream ports of
          * PCIe switches
          */
-        if (!pci_is_pcie(pdev) ||
-            (pci_pcie_type(pdev) != PCI_EXP_TYPE_ROOT_PORT &&
-             pci_pcie_type(pdev) != PCI_EXP_TYPE_DOWNSTREAM))
+        if (!(edev->mode & (EEH_DEV_ROOT_PORT | EEH_DEV_DS_PORT)))
                 return;
 
-        pr_debug("%s: Check PCIe link for %s ...\n",
-                 __func__, pci_name(pdev));
+        pr_debug("%s: Check PCIe link for %04x:%02x:%02x.%01x ...\n",
+                 __func__, edev->phb->global_number,
+                 edev->config_addr >> 8,
+                 PCI_SLOT(edev->config_addr & 0xFF),
+                 PCI_FUNC(edev->config_addr & 0xFF));
 
         /* Check slot status */
-        cap = pdev->pcie_cap;
+        cap = edev->pcie_cap;
         eeh_ops->read_config(dn, cap + PCI_EXP_SLTSTA, 2, &val);
         if (!(val & PCI_EXP_SLTSTA_PDS)) {
                 pr_debug("  No card in the slot (0x%04x) !\n", val);
@@ -653,8 +653,7 @@ static void eeh_bridge_check_link(struct pci_dev *pdev,
 #define BYTE_SWAP(OFF)  (8*((OFF)/4)+3-(OFF))
 #define SAVED_BYTE(OFF) (((u8 *)(edev->config_space))[BYTE_SWAP(OFF)])
 
-static void eeh_restore_bridge_bars(struct pci_dev *pdev,
-                                    struct eeh_dev *edev,
+static void eeh_restore_bridge_bars(struct eeh_dev *edev,
                                     struct device_node *dn)
 {
         int i;
@@ -680,7 +679,7 @@ static void eeh_restore_bridge_bars(struct pci_dev *pdev,
         eeh_ops->write_config(dn, PCI_COMMAND, 4, edev->config_space[1]);
 
         /* Check the PCIe link is ready */
-        eeh_bridge_check_link(pdev, dn);
+        eeh_bridge_check_link(edev, dn);
 }
 
 static void eeh_restore_device_bars(struct eeh_dev *edev,
@@ -729,19 +728,12 @@ static void eeh_restore_device_bars(struct eeh_dev *edev,
  */
 static void *eeh_restore_one_device_bars(void *data, void *flag)
 {
-        struct pci_dev *pdev = NULL;
         struct eeh_dev *edev = (struct eeh_dev *)data;
         struct device_node *dn = eeh_dev_to_of_node(edev);
 
-        /* Trace the PCI bridge */
-        if (eeh_probe_mode_dev()) {
-                pdev = eeh_dev_to_pci_dev(edev);
-                if (pdev->hdr_type != PCI_HEADER_TYPE_BRIDGE)
-                        pdev = NULL;
-        }
-
-        if (pdev)
-                eeh_restore_bridge_bars(pdev, edev, dn);
+        /* Do special restore for bridges */
+        if (edev->mode & EEH_DEV_BRIDGE)
+                eeh_restore_bridge_bars(edev, dn);
         else
                 eeh_restore_device_bars(edev, dn);
 
diff --git a/arch/powerpc/kernel/eeh_sysfs.c b/arch/powerpc/kernel/eeh_sysfs.c
index e7ae3484918c..5d753d4f2c75 100644
--- a/arch/powerpc/kernel/eeh_sysfs.c
+++ b/arch/powerpc/kernel/eeh_sysfs.c
@@ -56,19 +56,40 @@ EEH_SHOW_ATTR(eeh_pe_config_addr,  pe_config_addr,  "0x%x");
 
 void eeh_sysfs_add_device(struct pci_dev *pdev)
 {
+        struct eeh_dev *edev = pci_dev_to_eeh_dev(pdev);
         int rc=0;
 
+        if (edev && (edev->mode & EEH_DEV_SYSFS))
+                return;
+
         rc += device_create_file(&pdev->dev, &dev_attr_eeh_mode);
         rc += device_create_file(&pdev->dev, &dev_attr_eeh_config_addr);
         rc += device_create_file(&pdev->dev, &dev_attr_eeh_pe_config_addr);
 
         if (rc)
                 printk(KERN_WARNING "EEH: Unable to create sysfs entries\n");
+        else if (edev)
+                edev->mode |= EEH_DEV_SYSFS;
 }
 
 void eeh_sysfs_remove_device(struct pci_dev *pdev)
 {
+        struct eeh_dev *edev = pci_dev_to_eeh_dev(pdev);
+
+        /*
+         * The parent directory might have been removed. We needn't
+         * continue for that case.
+         */
+        if (!pdev->dev.kobj.sd) {
+                if (edev)
+                        edev->mode &= ~EEH_DEV_SYSFS;
+                return;
+        }
+
         device_remove_file(&pdev->dev, &dev_attr_eeh_mode);
         device_remove_file(&pdev->dev, &dev_attr_eeh_config_addr);
         device_remove_file(&pdev->dev, &dev_attr_eeh_pe_config_addr);
+
+        if (edev)
+                edev->mode &= ~EEH_DEV_SYSFS;
 }
diff --git a/arch/powerpc/kernel/pci-common.c b/arch/powerpc/kernel/pci-common.c
index f46914a0f33e..7d22a675fe1a 100644
--- a/arch/powerpc/kernel/pci-common.c
+++ b/arch/powerpc/kernel/pci-common.c
@@ -1462,6 +1462,8 @@ void pcibios_finish_adding_to_bus(struct pci_bus *bus)
         /* Allocate bus and devices resources */
         pcibios_allocate_bus_resources(bus);
         pcibios_claim_one_bus(bus);
+        if (!pci_has_flag(PCI_PROBE_ONLY))
+                pci_assign_unassigned_bus_resources(bus);
 
         /* Fixup EEH */
         eeh_add_device_tree_late(bus);
diff --git a/arch/powerpc/kernel/pci-hotplug.c b/arch/powerpc/kernel/pci-hotplug.c
index 3f608800c06b..c1e17ae68a08 100644
--- a/arch/powerpc/kernel/pci-hotplug.c
+++ b/arch/powerpc/kernel/pci-hotplug.c
@@ -22,45 +22,40 @@
 #include <asm/eeh.h>
 
 /**
- * __pcibios_remove_pci_devices - remove all devices under this bus
+ * pcibios_release_device - release PCI device
+ * @dev: PCI device
+ *
+ * The function is called before releasing the indicated PCI device.
+ */
+void pcibios_release_device(struct pci_dev *dev)
+{
+        eeh_remove_device(dev);
+}
+
+/**
+ * pcibios_remove_pci_devices - remove all devices under this bus
  * @bus: the indicated PCI bus
- * @purge_pe: destroy the PE on removal of PCI devices
  *
  * Remove all of the PCI devices under this bus both from the
  * linux pci device tree, and from the powerpc EEH address cache.
- * By default, the corresponding PE will be destroied during the
- * normal PCI hotplug path. For PCI hotplug during EEH recovery,
- * the corresponding PE won't be destroied and deallocated.
  */
-void __pcibios_remove_pci_devices(struct pci_bus *bus, int purge_pe)
+void pcibios_remove_pci_devices(struct pci_bus *bus)
 {
         struct pci_dev *dev, *tmp;
         struct pci_bus *child_bus;
 
         /* First go down child busses */
         list_for_each_entry(child_bus, &bus->children, node)
-                __pcibios_remove_pci_devices(child_bus, purge_pe);
+                pcibios_remove_pci_devices(child_bus);
 
         pr_debug("PCI: Removing devices on bus %04x:%02x\n",
                  pci_domain_nr(bus),  bus->number);
         list_for_each_entry_safe(dev, tmp, &bus->devices, bus_list) {
-                pr_debug("     * Removing %s...\n", pci_name(dev));
-                eeh_remove_bus_device(dev, purge_pe);
+                pr_debug("   Removing %s...\n", pci_name(dev));
                 pci_stop_and_remove_bus_device(dev);
         }
 }
 
-/**
- * pcibios_remove_pci_devices - remove all devices under this bus
- * @bus: the indicated PCI bus
- *
- * Remove all of the PCI devices under this bus both from the
- * linux pci device tree, and from the powerpc EEH address cache.
- */
-void pcibios_remove_pci_devices(struct pci_bus *bus)
-{
-        __pcibios_remove_pci_devices(bus, 1);
-}
 EXPORT_SYMBOL_GPL(pcibios_remove_pci_devices);
 
 /**
@@ -76,7 +71,7 @@ EXPORT_SYMBOL_GPL(pcibios_remove_pci_devices);
  */
 void pcibios_add_pci_devices(struct pci_bus * bus)
 {
-        int slotno, num, mode, pass, max;
+        int slotno, mode, pass, max;
         struct pci_dev *dev;
         struct device_node *dn = pci_bus_to_OF_node(bus);
 
@@ -90,11 +85,15 @@ void pcibios_add_pci_devices(struct pci_bus * bus)
                 /* use ofdt-based probe */
                 of_rescan_bus(dn, bus);
         } else if (mode == PCI_PROBE_NORMAL) {
-                /* use legacy probe */
+                /*
+                 * Use legacy probe. In the partial hotplug case, we
+                 * probably have grandchildren devices unplugged. So
+                 * we don't check the return value from pci_scan_slot() in
+                 * order for fully rescan all the way down to pick them up.
+                 * They can have been removed during partial hotplug.
+                 */
                 slotno = PCI_SLOT(PCI_DN(dn->child)->devfn);
-                num = pci_scan_slot(bus, PCI_DEVFN(slotno, 0));
-                if (!num)
-                        return;
+                pci_scan_slot(bus, PCI_DEVFN(slotno, 0));
                 pcibios_setup_bus_devices(bus);
                 max = bus->busn_res.start;
                 for (pass = 0; pass < 2; pass++) {
diff --git a/arch/powerpc/kernel/pci_of_scan.c b/arch/powerpc/kernel/pci_of_scan.c
index 6b0ba5854d99..15d9105323bf 100644
--- a/arch/powerpc/kernel/pci_of_scan.c
+++ b/arch/powerpc/kernel/pci_of_scan.c
@@ -230,11 +230,14 @@ void of_scan_pci_bridge(struct pci_dev *dev)
                 return;
         }
 
-        bus = pci_add_new_bus(dev->bus, dev, busrange[0]);
+        bus = pci_find_bus(pci_domain_nr(dev->bus), busrange[0]);
         if (!bus) {
-                printk(KERN_ERR "Failed to create pci bus for %s\n",
-                       node->full_name);
-                return;
+                bus = pci_add_new_bus(dev->bus, dev, busrange[0]);
+                if (!bus) {
+                        printk(KERN_ERR "Failed to create pci bus for %s\n",
+                               node->full_name);
+                        return;
+                }
         }
 
         bus->primary = dev->bus->number;
@@ -292,6 +295,38 @@ void of_scan_pci_bridge(struct pci_dev *dev)
 }
 EXPORT_SYMBOL(of_scan_pci_bridge);
 
+static struct pci_dev *of_scan_pci_dev(struct pci_bus *bus,
+                            struct device_node *dn)
+{
+        struct pci_dev *dev = NULL;
+        const u32 *reg;
+        int reglen, devfn;
+
+        pr_debug("  * %s\n", dn->full_name);
+        if (!of_device_is_available(dn))
+                return NULL;
+
+        reg = of_get_property(dn, "reg", &reglen);
+        if (reg == NULL || reglen < 20)
+                return NULL;
+        devfn = (reg[0] >> 8) & 0xff;
+
+        /* Check if the PCI device is already there */
+        dev = pci_get_slot(bus, devfn);
+        if (dev) {
+                pci_dev_put(dev);
+                return dev;
+        }
+
+        /* create a new pci_dev for this device */
+        dev = of_create_pci_dev(dn, bus, devfn);
+        if (!dev)
+                return NULL;
+
+        pr_debug("  dev header type: %x\n", dev->hdr_type);
+        return dev;
+}
+
 /**
  * __of_scan_bus - given a PCI bus node, setup bus and scan for child devices
  * @node: device tree node for the PCI bus
@@ -302,8 +337,6 @@ static void __of_scan_bus(struct device_node *node, struct pci_bus *bus,
                           int rescan_existing)
 {
         struct device_node *child;
-        const u32 *reg;
-        int reglen, devfn;
         struct pci_dev *dev;
 
         pr_debug("of_scan_bus(%s) bus no %d...\n",
@@ -311,16 +344,7 @@ static void __of_scan_bus(struct device_node *node, struct pci_bus *bus,
 
         /* Scan direct children */
         for_each_child_of_node(node, child) {
-                pr_debug("  * %s\n", child->full_name);
-                if (!of_device_is_available(child))
-                        continue;
-                reg = of_get_property(child, "reg", &reglen);
-                if (reg == NULL || reglen < 20)
-                        continue;
-                devfn = (reg[0] >> 8) & 0xff;
-
-                /* create a new pci_dev for this device */
-                dev = of_create_pci_dev(child, bus, devfn);
+                dev = of_scan_pci_dev(bus, child);
                 if (!dev)
                         continue;
                 pr_debug("    dev header type: %x\n", dev->hdr_type);
diff --git a/arch/powerpc/kernel/prom_init.c b/arch/powerpc/kernel/prom_init.c
index 5eccda9fd33f..607902424e73 100644
--- a/arch/powerpc/kernel/prom_init.c
+++ b/arch/powerpc/kernel/prom_init.c
@@ -644,7 +644,8 @@ unsigned char ibm_architecture_vec[] = {
         W(0xfffe0000), W(0x003a0000),   /* POWER5/POWER5+ */
         W(0xffff0000), W(0x003e0000),   /* POWER6 */
         W(0xffff0000), W(0x003f0000),   /* POWER7 */
-        W(0xffff0000), W(0x004b0000),   /* POWER8 */
+        W(0xffff0000), W(0x004b0000),   /* POWER8E */
+        W(0xffff0000), W(0x004d0000),   /* POWER8 */
         W(0xffffffff), W(0x0f000004),   /* all 2.07-compliant */
         W(0xffffffff), W(0x0f000003),   /* all 2.06-compliant */
         W(0xffffffff), W(0x0f000002),   /* all 2.05-compliant */
@@ -706,7 +707,7 @@ unsigned char ibm_architecture_vec[] = {
          * must match by the macro below. Update the definition if
          * the structure layout changes.
          */
-#define IBM_ARCH_VEC_NRCORES_OFFSET     117
+#define IBM_ARCH_VEC_NRCORES_OFFSET     125
         W(NR_CPUS),                     /* number of cores supported */
         0,
         0,
diff --git a/arch/powerpc/kernel/vmlinux.lds.S b/arch/powerpc/kernel/vmlinux.lds.S
index 654e479802f2..f096e72262f4 100644
--- a/arch/powerpc/kernel/vmlinux.lds.S
+++ b/arch/powerpc/kernel/vmlinux.lds.S
@@ -38,9 +38,6 @@ jiffies = jiffies_64 + 4;
 #endif
 SECTIONS
 {
-        . = 0;
-        reloc_start = .;
-
         . = KERNELBASE;
 
 /*