diff --git a/drivers/pci/hotplug.c b/drivers/pci/hotplug.c
index b844bc972324..10444988a10b 100644
--- a/drivers/pci/hotplug.c
+++ b/drivers/pci/hotplug.c
@@ -20,46 +20,35 @@ int pci_hotplug (struct device *dev, char **envp, int num_envp,
 
 	scratch = buffer;
 
-	/* stuff we want to pass to /sbin/hotplug */
-	envp[i++] = scratch;
-	length += scnprintf (scratch, buffer_size - length, "PCI_CLASS=%04X",
-			    pdev->class);
-	if ((buffer_size - length <= 0) || (i >= num_envp))
-		return -ENOMEM;
-	++length;
-	scratch += length;
 
-	envp[i++] = scratch;
-	length += scnprintf (scratch, buffer_size - length, "PCI_ID=%04X:%04X",
-			    pdev->vendor, pdev->device);
-	if ((buffer_size - length <= 0) || (i >= num_envp))
-		return -ENOMEM;
-	++length;
-	scratch += length;
-
-	envp[i++] = scratch;
-	length += scnprintf (scratch, buffer_size - length,
-			    "PCI_SUBSYS_ID=%04X:%04X", pdev->subsystem_vendor,
-			    pdev->subsystem_device);
-	if ((buffer_size - length <= 0) || (i >= num_envp))
-		return -ENOMEM;
-	++length;
-	scratch += length;
-
-	envp[i++] = scratch;
-	length += scnprintf (scratch, buffer_size - length, "PCI_SLOT_NAME=%s",
-			    pci_name(pdev));
-	if ((buffer_size - length <= 0) || (i >= num_envp))
+	if (add_hotplug_env_var(envp, num_envp, &i,
+				buffer, buffer_size, &length,
+				"PCI_CLASS=%04X", pdev->class))
 		return -ENOMEM;
 
-	envp[i++] = scratch;
-	length += scnprintf (scratch, buffer_size - length,
-			    "MODALIAS=pci:v%08Xd%08Xsv%08Xsd%08Xbc%02Xsc%02Xi%02x",
-			    pdev->vendor, pdev->device,
-			    pdev->subsystem_vendor, pdev->subsystem_device,
-			    (u8)(pdev->class >> 16), (u8)(pdev->class >> 8),
-			    (u8)(pdev->class));
-	if ((buffer_size - length <= 0) || (i >= num_envp))
+	if (add_hotplug_env_var(envp, num_envp, &i,
+				buffer, buffer_size, &length,
+				"PCI_ID=%04X:%04X", pdev->vendor, pdev->device))
+		return -ENOMEM;
+
+	if (add_hotplug_env_var(envp, num_envp, &i,
+				buffer, buffer_size, &length,
+				"PCI_SUBSYS_ID=%04X:%04X", pdev->subsystem_vendor,
+				pdev->subsystem_device))
+		return -ENOMEM;
+
+	if (add_hotplug_env_var(envp, num_envp, &i,
+				buffer, buffer_size, &length,
+				"PCI_SLOT_NAME=%s", pci_name(pdev)))
+		return -ENOMEM;
+
+	if (add_hotplug_env_var(envp, num_envp, &i,
+				buffer, buffer_size, &length,
+				"MODALIAS=pci:v%08Xd%08Xsv%08Xsd%08Xbc%02Xsc%02Xi%02x",
+				pdev->vendor, pdev->device,
+				pdev->subsystem_vendor, pdev->subsystem_device,
+				(u8)(pdev->class >> 16), (u8)(pdev->class >> 8),
+				(u8)(pdev->class)))
 		return -ENOMEM;
 
 	envp[i] = NULL;
diff --git a/drivers/pci/hotplug/pciehprm_acpi.c b/drivers/pci/hotplug/pciehprm_acpi.c
index 305b47ec2f2c..1406db35b089 100644
--- a/drivers/pci/hotplug/pciehprm_acpi.c
+++ b/drivers/pci/hotplug/pciehprm_acpi.c
@@ -1696,15 +1696,15 @@ void pciehprm_enable_card(
 	pci_bus->number = func->bus;
 	devfn = PCI_DEVFN(func->device, func->function);
 
-	rc = pci_bus_read_config_word(pci_bus, devfn, PCI_COMMAND, &command);
+	rc = pci_bus_read_config_word(pci_bus, devfn, PCI_COMMAND, &cmd);
 
 	if (card_type == PCI_HEADER_TYPE_BRIDGE) {
-		rc = pci_bus_read_config_word(pci_bus, devfn, PCI_BRIDGE_CONTROL, &bcommand);
+		rc = pci_bus_read_config_word(pci_bus, devfn, PCI_BRIDGE_CONTROL, &bcmd);
 	}
 
-	cmd = command  = command | PCI_COMMAND_MASTER | PCI_COMMAND_INVALIDATE
+	command  = cmd | PCI_COMMAND_MASTER | PCI_COMMAND_INVALIDATE
 		| PCI_COMMAND_IO | PCI_COMMAND_MEMORY;
-	bcmd = bcommand  = bcommand | PCI_BRIDGE_CTL_NO_ISA;
+	bcommand  = bcmd | PCI_BRIDGE_CTL_NO_ISA;
 
 	ab = find_acpi_bridge_by_bus(acpi_bridges_head, ctrl->seg, ctrl->bus);
 	if (ab) {
diff --git a/drivers/pci/pci.h b/drivers/pci/pci.h
index d00168b1f662..d3f3dd42240d 100644
--- a/drivers/pci/pci.h
+++ b/drivers/pci/pci.h
@@ -29,7 +29,6 @@ static inline int pci_proc_detach_bus(struct pci_bus *bus) { return 0; }
 #endif
 
 /* Functions for PCI Hotplug drivers to use */
-extern struct pci_bus * pci_add_new_bus(struct pci_bus *parent, struct pci_dev *dev, int busnr);
 extern unsigned int pci_do_scan_bus(struct pci_bus *bus);
 extern int pci_remove_device_safe(struct pci_dev *dev);
 extern unsigned char pci_max_busnr(void);
diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c
index b9c9b03919d4..35caec13023a 100644
--- a/drivers/pci/probe.c
+++ b/drivers/pci/probe.c
@@ -753,6 +753,12 @@ pci_scan_device(struct pci_bus *bus, int devfn)
 		kfree(dev);
 		return NULL;
 	}
+
+	return dev;
+}
+
+void __devinit pci_device_add(struct pci_dev *dev, struct pci_bus *bus)
+{
 	device_initialize(&dev->dev);
 	dev->dev.release = pci_release_dev;
 	pci_dev_get(dev);
@@ -760,20 +766,6 @@ pci_scan_device(struct pci_bus *bus, int devfn)
 	dev->dev.dma_mask = &dev->dma_mask;
 	dev->dev.coherent_dma_mask = 0xffffffffull;
 
-	return dev;
-}
-
-struct pci_dev * __devinit
-pci_scan_single_device(struct pci_bus *bus, int devfn)
-{
-	struct pci_dev *dev;
-
-	dev = pci_scan_device(bus, devfn);
-	pci_scan_msi_device(dev);
-
-	if (!dev)
-		return NULL;
-	
 	/* Fix up broken headers */
 	pci_fixup_device(pci_fixup_header, dev);
 
@@ -785,6 +777,19 @@ pci_scan_single_device(struct pci_bus *bus, int devfn)
 	spin_lock(&pci_bus_lock);
 	list_add_tail(&dev->bus_list, &bus->devices);
 	spin_unlock(&pci_bus_lock);
+}
+
+struct pci_dev * __devinit
+pci_scan_single_device(struct pci_bus *bus, int devfn)
+{
+	struct pci_dev *dev;
+
+	dev = pci_scan_device(bus, devfn);
+	if (!dev)
+		return NULL;
+
+	pci_device_add(dev, bus);
+	pci_scan_msi_device(dev);
 
 	return dev;
 }
@@ -881,7 +886,8 @@ unsigned int __devinit pci_do_scan_bus(struct pci_bus *bus)
 	return max;
 }
 
-struct pci_bus * __devinit pci_scan_bus_parented(struct device *parent, int bus, struct pci_ops *ops, void *sysdata)
+struct pci_bus * __devinit pci_create_bus(struct device *parent,
+		int bus, struct pci_ops *ops, void *sysdata)
 {
 	int error;
 	struct pci_bus *b;
@@ -938,8 +944,6 @@ struct pci_bus * __devinit pci_scan_bus_parented(struct device *parent, int bus,
 	b->resource[0] = &ioport_resource;
 	b->resource[1] = &iomem_resource;
 
-	b->subordinate = pci_scan_child_bus(b);
-
 	return b;
 
 sys_create_link_err:
@@ -957,6 +961,18 @@ struct pci_bus * __devinit pci_scan_bus_parented(struct device *parent, int bus,
 	kfree(b);
 	return NULL;
 }
+EXPORT_SYMBOL_GPL(pci_create_bus);
+
+struct pci_bus * __devinit pci_scan_bus_parented(struct device *parent,
+		int bus, struct pci_ops *ops, void *sysdata)
+{
+	struct pci_bus *b;
+
+	b = pci_create_bus(parent, bus, ops, sysdata);
+	if (b)
+		b->subordinate = pci_scan_child_bus(b);
+	return b;
+}
 EXPORT_SYMBOL(pci_scan_bus_parented);
 
 #ifdef CONFIG_HOTPLUG
diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c
index 4f0c1bd3674a..11ca44387cb0 100644
--- a/drivers/pci/quirks.c
+++ b/drivers/pci/quirks.c
@@ -876,6 +876,12 @@ static void __init asus_hides_smbus_hostbridge(struct pci_dev *dev)
                        case 0xC00C: /* Samsung P35 notebook */
                                asus_hides_smbus = 1;
                        }
+	} else if (unlikely(dev->subsystem_vendor == PCI_VENDOR_ID_COMPAQ)) {
+		if (dev->device == PCI_DEVICE_ID_INTEL_82855PM_HB)
+			switch(dev->subsystem_device) {
+			case 0x0058: /* Compaq Evo N620c */
+				asus_hides_smbus = 1;
+			}
 	}
 }
 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL,	PCI_DEVICE_ID_INTEL_82845_HB,	asus_hides_smbus_hostbridge );
diff --git a/include/linux/pci.h b/include/linux/pci.h
index c62e89270237..e5e24e13a114 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -315,8 +315,11 @@ static inline struct pci_bus *pci_scan_bus(int bus, struct pci_ops *ops, void *s
 		pci_bus_add_devices(root_bus);
 	return root_bus;
 }
+struct pci_bus *pci_create_bus(struct device *parent, int bus, struct pci_ops *ops, void *sysdata);
+struct pci_bus * pci_add_new_bus(struct pci_bus *parent, struct pci_dev *dev, int busnr);
 int pci_scan_slot(struct pci_bus *bus, int devfn);
 struct pci_dev * pci_scan_single_device(struct pci_bus *bus, int devfn);
+void pci_device_add(struct pci_dev *dev, struct pci_bus *bus);
 unsigned int pci_scan_child_bus(struct pci_bus *bus);
 void pci_bus_add_device(struct pci_dev *dev);
 void pci_read_bridge_bases(struct pci_bus *child);
@@ -377,32 +380,32 @@ static inline int pci_write_config_dword(struct pci_dev *dev, int where, u32 val
 	return pci_bus_write_config_dword (dev->bus, dev->devfn, where, val);
 }
 
-int pci_enable_device(struct pci_dev *dev);
-int pci_enable_device_bars(struct pci_dev *dev, int mask);
+int __must_check pci_enable_device(struct pci_dev *dev);
+int __must_check pci_enable_device_bars(struct pci_dev *dev, int mask);
 void pci_disable_device(struct pci_dev *dev);
 void pci_set_master(struct pci_dev *dev);
 #define HAVE_PCI_SET_MWI
-int pci_set_mwi(struct pci_dev *dev);
+int __must_check pci_set_mwi(struct pci_dev *dev);
 void pci_clear_mwi(struct pci_dev *dev);
 void pci_intx(struct pci_dev *dev, int enable);
-int pci_set_dma_mask(struct pci_dev *dev, u64 mask);
-int pci_set_consistent_dma_mask(struct pci_dev *dev, u64 mask);
+int __must_check pci_set_dma_mask(struct pci_dev *dev, u64 mask);
+int __must_check pci_set_consistent_dma_mask(struct pci_dev *dev, u64 mask);
 void pci_update_resource(struct pci_dev *dev, struct resource *res, int resno);
 int pci_assign_resource(struct pci_dev *dev, int i);
 void pci_restore_bars(struct pci_dev *dev);
 
 /* ROM control related routines */
-void __iomem *pci_map_rom(struct pci_dev *pdev, size_t *size);
-void __iomem *pci_map_rom_copy(struct pci_dev *pdev, size_t *size);
+void __iomem __must_check *pci_map_rom(struct pci_dev *pdev, size_t *size);
+void __iomem __must_check *pci_map_rom_copy(struct pci_dev *pdev, size_t *size);
 void pci_unmap_rom(struct pci_dev *pdev, void __iomem *rom);
 void pci_remove_rom(struct pci_dev *pdev);
 
 /* Power management related routines */
 int pci_save_state(struct pci_dev *dev);
 int pci_restore_state(struct pci_dev *dev);
-int pci_set_power_state(struct pci_dev *dev, pci_power_t state);
-pci_power_t pci_choose_state(struct pci_dev *dev, pm_message_t state);
-int pci_enable_wake(struct pci_dev *dev, pci_power_t state, int enable);
+int __must_check pci_set_power_state(struct pci_dev *dev, pci_power_t state);
+pci_power_t __must_check pci_choose_state(struct pci_dev *dev, pm_message_t state);
+int __must_check pci_enable_wake(struct pci_dev *dev, pci_power_t state, int enable);
 
 /* Helper functions for low-level code (drivers/pci/setup-[bus,res].c) */
 void pci_bus_assign_resources(struct pci_bus *bus);