9 files changed, 40 insertions, 23 deletions

diff --git a/drivers/pci/hotplug.c b/drivers/pci/hotplug.c
index 10444988a10b..e1743be31909 100644
--- a/drivers/pci/hotplug.c
+++ b/drivers/pci/hotplug.c
@@ -7,7 +7,6 @@ int pci_hotplug (struct device *dev, char **envp, int num_envp,
                  char *buffer, int buffer_size)
 {
         struct pci_dev *pdev;
-        char *scratch;
         int i = 0;
         int length = 0;
 
@@ -18,9 +17,6 @@ int pci_hotplug (struct device *dev, char **envp, int num_envp,
         if (!pdev)
                 return -ENODEV;
 
-        scratch = buffer;
-
-
         if (add_hotplug_env_var(envp, num_envp, &i,
                                 buffer, buffer_size, &length,
                                 "PCI_CLASS=%04X", pdev->class))
diff --git a/drivers/pci/hotplug/ibmphp_pci.c b/drivers/pci/hotplug/ibmphp_pci.c
index 8122fe734aa7..b1ba429e0a2d 100644
--- a/drivers/pci/hotplug/ibmphp_pci.c
+++ b/drivers/pci/hotplug/ibmphp_pci.c
@@ -558,7 +558,7 @@ static int configure_device (struct pci_func *func)
         pci_bus_write_config_byte (ibmphp_pci_bus, devfn, PCI_CACHE_LINE_SIZE, CACHE);
         pci_bus_write_config_byte (ibmphp_pci_bus, devfn, PCI_LATENCY_TIMER, LATENCY);
 
-        pci_bus_write_config_word (ibmphp_pci_bus, devfn, PCI_ROM_ADDRESS, 0x00L);
+        pci_bus_write_config_dword (ibmphp_pci_bus, devfn, PCI_ROM_ADDRESS, 0x00L);
         pci_bus_write_config_word (ibmphp_pci_bus, devfn, PCI_COMMAND, DEVICEENABLE);
 
         return 0;
diff --git a/drivers/pci/hotplug/pciehp_ctrl.c b/drivers/pci/hotplug/pciehp_ctrl.c
index 0e0947601526..898f6da6f0de 100644
--- a/drivers/pci/hotplug/pciehp_ctrl.c
+++ b/drivers/pci/hotplug/pciehp_ctrl.c
@@ -2526,7 +2526,6 @@ configure_new_function(struct controller *ctrl, struct pci_func *func,
         int cloop;
         u8 temp_byte;
         u8 class_code;
-        u16 temp_word;
         u32 rc;
         u32 temp_register;
         u32 base;
@@ -2682,8 +2681,7 @@ configure_new_function(struct controller *ctrl, struct pci_func *func,
                 }               /* End of base register loop */
 
                 /* disable ROM base Address */
-                temp_word = 0x00L;
-                rc = pci_bus_write_config_word (pci_bus, devfn, PCI_ROM_ADDRESS, temp_word);
+                rc = pci_bus_write_config_dword (pci_bus, devfn, PCI_ROM_ADDRESS, 0x00);
 
                 /* Set HP parameters (Cache Line Size, Latency Timer) */
                 rc = pciehprm_set_hpp(ctrl, func, PCI_HEADER_TYPE_NORMAL);
diff --git a/drivers/pci/hotplug/rpadlpar_sysfs.c b/drivers/pci/hotplug/rpadlpar_sysfs.c
index 752e6513c447..db69be85b458 100644
--- a/drivers/pci/hotplug/rpadlpar_sysfs.c
+++ b/drivers/pci/hotplug/rpadlpar_sysfs.c
@@ -62,7 +62,7 @@ static ssize_t add_slot_store(struct dlpar_io_attr *dlpar_attr,
         char drc_name[MAX_DRC_NAME_LEN];
         char *end;
 
-        if (nbytes > MAX_DRC_NAME_LEN)
+        if (nbytes >= MAX_DRC_NAME_LEN)
                 return 0;
 
         memcpy(drc_name, buf, nbytes);
@@ -83,7 +83,7 @@ static ssize_t remove_slot_store(struct dlpar_io_attr *dlpar_attr,
         char drc_name[MAX_DRC_NAME_LEN];
         char *end;
 
-        if (nbytes > MAX_DRC_NAME_LEN)
+        if (nbytes >= MAX_DRC_NAME_LEN)
                 return 0;
 
         memcpy(drc_name, buf, nbytes);
diff --git a/drivers/pci/hotplug/sgi_hotplug.c b/drivers/pci/hotplug/sgi_hotplug.c
index b1409441c1cd..a32ae82e5922 100644
--- a/drivers/pci/hotplug/sgi_hotplug.c
+++ b/drivers/pci/hotplug/sgi_hotplug.c
@@ -159,7 +159,7 @@ static int sn_hp_slot_private_alloc(struct hotplug_slot *bss_hotplug_slot,
 
         pcibus_info = SN_PCIBUS_BUSSOFT_INFO(pci_bus);
 
-        slot = kcalloc(1, sizeof(*slot), GFP_KERNEL);
+        slot = kzalloc(sizeof(*slot), GFP_KERNEL);
         if (!slot)
                 return -ENOMEM;
         bss_hotplug_slot->private = slot;
@@ -491,7 +491,7 @@ static int sn_hotplug_slot_register(struct pci_bus *pci_bus)
                 if (sn_pci_slot_valid(pci_bus, device) != 1)
                         continue;
 
-                bss_hotplug_slot = kcalloc(1, sizeof(*bss_hotplug_slot),
+                bss_hotplug_slot = kzalloc(sizeof(*bss_hotplug_slot),
                                            GFP_KERNEL);
                 if (!bss_hotplug_slot) {
                         rc = -ENOMEM;
@@ -499,7 +499,7 @@ static int sn_hotplug_slot_register(struct pci_bus *pci_bus)
                 }
 
                 bss_hotplug_slot->info =
-                        kcalloc(1, sizeof(struct hotplug_slot_info),
+                        kzalloc(sizeof(struct hotplug_slot_info),
                                 GFP_KERNEL);
                 if (!bss_hotplug_slot->info) {
                         rc = -ENOMEM;
diff --git a/drivers/pci/hotplug/shpchp_ctrl.c b/drivers/pci/hotplug/shpchp_ctrl.c
index 783b5abb0717..91c9903e621f 100644
--- a/drivers/pci/hotplug/shpchp_ctrl.c
+++ b/drivers/pci/hotplug/shpchp_ctrl.c
@@ -2824,8 +2824,7 @@ static int configure_new_function (struct controller * ctrl, struct pci_func * f
                 }
 #endif
                 /* Disable ROM base Address */
-                temp_word = 0x00L;
-                rc = pci_bus_write_config_word (pci_bus, devfn, PCI_ROM_ADDRESS, temp_word);
+                rc = pci_bus_write_config_dword (pci_bus, devfn, PCI_ROM_ADDRESS, 0x00);
 
                 /* Set HP parameters (Cache Line Size, Latency Timer) */
                 rc = shpchprm_set_hpp(ctrl, func, PCI_HEADER_TYPE_NORMAL);
diff --git a/drivers/pci/pci-sysfs.c b/drivers/pci/pci-sysfs.c
index 56a3b397efee..2898830c496f 100644
--- a/drivers/pci/pci-sysfs.c
+++ b/drivers/pci/pci-sysfs.c
@@ -360,7 +360,7 @@ pci_create_resource_files(struct pci_dev *pdev)
                         continue;
 
                 /* allocate attribute structure, piggyback attribute name */
-                res_attr = kcalloc(1, sizeof(*res_attr) + 10, GFP_ATOMIC);
+                res_attr = kzalloc(sizeof(*res_attr) + 10, GFP_ATOMIC);
                 if (res_attr) {
                         char *res_attr_name = (char *)(res_attr + 1);
 
diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c
index 992db89adce7..259d247b7551 100644
--- a/drivers/pci/pci.c
+++ b/drivers/pci/pci.c
@@ -309,17 +309,25 @@ pci_set_power_state(struct pci_dev *dev, pci_power_t state)
 
         pci_read_config_word(dev, pm + PCI_PM_CTRL, &pmcsr);
 
-        /* If we're in D3, force entire word to 0.
+        /* If we're (effectively) in D3, force entire word to 0.
          * This doesn't affect PME_Status, disables PME_En, and
          * sets PowerState to 0.
          */
-        if (dev->current_state >= PCI_D3hot) {
-                if (!(pmcsr & PCI_PM_CTRL_NO_SOFT_RESET))
+        switch (dev->current_state) {
+        case PCI_UNKNOWN: /* Boot-up */
+                if ((pmcsr & PCI_PM_CTRL_STATE_MASK) == PCI_D3hot
+                 && !(pmcsr & PCI_PM_CTRL_NO_SOFT_RESET))
                         need_restore = 1;
+                /* Fall-through: force to D0 */
+        case PCI_D3hot:
+        case PCI_D3cold:
+        case PCI_POWER_ERROR:
                 pmcsr = 0;
-        } else {
+                break;
+        default:
                 pmcsr &= ~PCI_PM_CTRL_STATE_MASK;
                 pmcsr |= state;
+                break;
         }
 
         /* enter specified state */
diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c
index 26a55d08b506..005786416bb5 100644
--- a/drivers/pci/probe.c
+++ b/drivers/pci/probe.c
@@ -165,7 +165,7 @@ static void pci_read_bases(struct pci_dev *dev, unsigned int howmany, int rom)
                 if (l == 0xffffffff)
                         l = 0;
                 if ((l & PCI_BASE_ADDRESS_SPACE) == PCI_BASE_ADDRESS_SPACE_MEMORY) {
-                        sz = pci_size(l, sz, PCI_BASE_ADDRESS_MEM_MASK);
+                        sz = pci_size(l, sz, (u32)PCI_BASE_ADDRESS_MEM_MASK);
                         if (!sz)
                                 continue;
                         res->start = l & PCI_BASE_ADDRESS_MEM_MASK;
@@ -215,7 +215,7 @@ static void pci_read_bases(struct pci_dev *dev, unsigned int howmany, int rom)
                 if (l == 0xffffffff)
                         l = 0;
                 if (sz && sz != 0xffffffff) {
-                        sz = pci_size(l, sz, PCI_ROM_ADDRESS_MASK);
+                        sz = pci_size(l, sz, (u32)PCI_ROM_ADDRESS_MASK);
                         if (sz) {
                                 res->flags = (l & IORESOURCE_ROM_ENABLE) |
                                   IORESOURCE_MEM | IORESOURCE_PREFETCH |
@@ -402,6 +402,12 @@ static void pci_enable_crs(struct pci_dev *dev)
 static void __devinit pci_fixup_parent_subordinate_busnr(struct pci_bus *child, int max)
 {
         struct pci_bus *parent = child->parent;
+
+        /* Attempts to fix that up are really dangerous unless
+           we're going to re-assign all bus numbers. */
+        if (!pcibios_assign_all_busses())
+                return;
+
         while (parent->parent && parent->subordinate < max) {
                 parent->subordinate = max;
                 pci_write_config_byte(parent->self, PCI_SUBORDINATE_BUS, max);
@@ -478,8 +484,18 @@ int __devinit pci_scan_bridge(struct pci_bus *bus, struct pci_dev * dev, int max
                  * We need to assign a number to this bus which we always
                  * do in the second pass.
                  */
-                if (!pass)
+                if (!pass) {
+                        if (pcibios_assign_all_busses())
+                                /* Temporarily disable forwarding of the
+                                   configuration cycles on all bridges in
+                                   this bus segment to avoid possible
+                                   conflicts in the second pass between two
+                                   bridges programmed with overlapping
+                                   bus ranges. */
+                                pci_write_config_dword(dev, PCI_PRIMARY_BUS,
+                                                       buses & ~0xffffff);
                         return max;
+                }
 
                 /* Clear errors */
                 pci_write_config_word(dev, PCI_STATUS, 0xffff);