6 files changed, 89 insertions, 39 deletions

diff --git a/drivers/pci/hotplug/Makefile b/drivers/pci/hotplug/Makefile
index e31fb91652ce..2aa117c8cd87 100644
--- a/drivers/pci/hotplug/Makefile
+++ b/drivers/pci/hotplug/Makefile
@@ -5,11 +5,15 @@
 obj-$(CONFIG_HOTPLUG_PCI)               += pci_hotplug.o
 obj-$(CONFIG_HOTPLUG_PCI_COMPAQ)        += cpqphp.o
 obj-$(CONFIG_HOTPLUG_PCI_IBM)           += ibmphp.o
+
+# pciehp should be linked before acpiphp in order to allow the native driver
+# to attempt to bind first. We can then fall back to generic support.
+
+obj-$(CONFIG_HOTPLUG_PCI_PCIE)          += pciehp.o
 obj-$(CONFIG_HOTPLUG_PCI_ACPI)          += acpiphp.o
 obj-$(CONFIG_HOTPLUG_PCI_ACPI_IBM)      += acpiphp_ibm.o
 obj-$(CONFIG_HOTPLUG_PCI_CPCI_ZT5550)   += cpcihp_zt5550.o
 obj-$(CONFIG_HOTPLUG_PCI_CPCI_GENERIC)  += cpcihp_generic.o
-obj-$(CONFIG_HOTPLUG_PCI_PCIE)          += pciehp.o
 obj-$(CONFIG_HOTPLUG_PCI_SHPC)          += shpchp.o
 obj-$(CONFIG_HOTPLUG_PCI_RPA)           += rpaphp.o
 obj-$(CONFIG_HOTPLUG_PCI_RPA_DLPAR)     += rpadlpar_io.o
diff --git a/drivers/pci/hotplug/fakephp.c b/drivers/pci/hotplug/fakephp.c
index b0e7de9e536d..d8649e127298 100644
--- a/drivers/pci/hotplug/fakephp.c
+++ b/drivers/pci/hotplug/fakephp.c
@@ -195,13 +195,13 @@ static void remove_slot_worker(struct work_struct *work)
  * Tries hard not to re-enable already existing devices;
  * also handles scanning of subfunctions.
  */
-static void pci_rescan_slot(struct pci_dev *temp)
+static int pci_rescan_slot(struct pci_dev *temp)
 {
         struct pci_bus *bus = temp->bus;
         struct pci_dev *dev;
         int func;
-        int retval;
         u8 hdr_type;
+        int count = 0;
 
         if (!pci_read_config_byte(temp, PCI_HEADER_TYPE, &hdr_type)) {
                 temp->hdr_type = hdr_type & 0x7f;
@@ -213,17 +213,12 @@ static void pci_rescan_slot(struct pci_dev *temp)
                                 dbg("New device on %s function %x:%x\n",
                                         bus->name, temp->devfn >> 3,
                                         temp->devfn & 7);
-                                retval = pci_bus_add_device(dev);
-                                if (retval)
-                                        dev_err(&dev->dev, "error adding "
-                                                "device, continuing.\n");
-                                else
-                                        add_slot(dev);
+                                count++;
                         }
                 }
                 /* multifunction device? */
                 if (!(hdr_type & 0x80))
-                        return;
+                        return count;
 
                 /* continue scanning for other functions */
                 for (func = 1, temp->devfn++; func < 8; func++, temp->devfn++) {
@@ -239,16 +234,13 @@ static void pci_rescan_slot(struct pci_dev *temp)
                                         dbg("New device on %s function %x:%x\n",
                                                 bus->name, temp->devfn >> 3,
                                                 temp->devfn & 7);
-                                        retval = pci_bus_add_device(dev);
-                                        if (retval)
-                                                dev_err(&dev->dev, "error adding "
-                                                        "device, continuing.\n");
-                                        else
-                                                add_slot(dev);
+                                        count++;
                                 }
                         }
                 }
         }
+
+        return count;
 }
 
 
@@ -262,6 +254,8 @@ static void pci_rescan_bus(const struct pci_bus *bus)
 {
         unsigned int devfn;
         struct pci_dev *dev;
+        int retval;
+        int found = 0;
         dev = alloc_pci_dev();
         if (!dev)
                 return;
@@ -270,7 +264,23 @@ static void pci_rescan_bus(const struct pci_bus *bus)
         dev->sysdata = bus->sysdata;
         for (devfn = 0; devfn < 0x100; devfn += 8) {
                 dev->devfn = devfn;
-                pci_rescan_slot(dev);
+                found += pci_rescan_slot(dev);
+        }
+
+        if (found) {
+                pci_bus_assign_resources(bus);
+                list_for_each_entry(dev, &bus->devices, bus_list) {
+                        /* Skip already-added devices */
+                        if (dev->is_added)
+                                        continue;
+                        retval = pci_bus_add_device(dev);
+                        if (retval)
+                                dev_err(&dev->dev,
+                                        "Error adding device, continuing\n");
+                        else
+                                add_slot(dev);
+                }
+                pci_bus_add_devices(bus);
         }
         kfree(dev);
 }
diff --git a/drivers/pci/intel-iommu.c b/drivers/pci/intel-iommu.c
index 3dfecb20d5e7..f4b7c79023ff 100644
--- a/drivers/pci/intel-iommu.c
+++ b/drivers/pci/intel-iommu.c
@@ -268,7 +268,12 @@ static long list_size;
 
 static void domain_remove_dev_info(struct dmar_domain *domain);
 
-int dmar_disabled;
+#ifdef CONFIG_DMAR_DEFAULT_ON
+int dmar_disabled = 0;
+#else
+int dmar_disabled = 1;
+#endif /*CONFIG_DMAR_DEFAULT_ON*/
+
 static int __initdata dmar_map_gfx = 1;
 static int dmar_forcedac;
 static int intel_iommu_strict;
@@ -284,9 +289,12 @@ static int __init intel_iommu_setup(char *str)
         if (!str)
                 return -EINVAL;
         while (*str) {
-                if (!strncmp(str, "off", 3)) {
+                if (!strncmp(str, "on", 2)) {
+                        dmar_disabled = 0;
+                        printk(KERN_INFO "Intel-IOMMU: enabled\n");
+                } else if (!strncmp(str, "off", 3)) {
                         dmar_disabled = 1;
-                        printk(KERN_INFO"Intel-IOMMU: disabled\n");
+                        printk(KERN_INFO "Intel-IOMMU: disabled\n");
                 } else if (!strncmp(str, "igfx_off", 8)) {
                         dmar_map_gfx = 0;
                         printk(KERN_INFO
diff --git a/drivers/pci/msi.c b/drivers/pci/msi.c
index 896a15d70f5b..44f15ff70c1d 100644
--- a/drivers/pci/msi.c
+++ b/drivers/pci/msi.c
@@ -103,6 +103,16 @@ static void msix_set_enable(struct pci_dev *dev, int enable)
         }
 }
 
+/*
+ * Essentially, this is ((1 << (1 << x)) - 1), but without the
+ * undefinedness of a << 32.
+ */
+static inline __attribute_const__ u32 msi_mask(unsigned x)
+{
+        static const u32 mask[] = { 1, 2, 4, 0xf, 0xff, 0xffff, 0xffffffff };
+        return mask[x];
+}
+
 static void msix_flush_writes(struct irq_desc *desc)
 {
         struct msi_desc *entry;
@@ -407,8 +417,7 @@ static int msi_capability_init(struct pci_dev *dev)
 
                 /* All MSIs are unmasked by default, Mask them all */
                 pci_read_config_dword(dev, base, &maskbits);
-                temp = (1 << multi_msi_capable(control));
-                temp = ((temp - 1) & ~temp);
+                temp = msi_mask((control & PCI_MSI_FLAGS_QMASK) >> 1);
                 maskbits |= temp;
                 pci_write_config_dword(dev, base, maskbits);
                 entry->msi_attrib.maskbits_mask = temp;
diff --git a/drivers/pci/pci-driver.c b/drivers/pci/pci-driver.c
index 9de07b75b993..ab1d615425a8 100644
--- a/drivers/pci/pci-driver.c
+++ b/drivers/pci/pci-driver.c
@@ -370,6 +370,7 @@ static int pci_legacy_suspend(struct device *dev, pm_message_t state)
         }
 
         pci_save_state(pci_dev);
+        pci_dev->state_saved = true;
         /*
          * This is for compatibility with existing code with legacy PM support.
          */
@@ -419,6 +420,7 @@ static int pci_legacy_resume(struct device *dev)
 static void pci_pm_default_resume_noirq(struct pci_dev *pci_dev)
 {
         pci_restore_standard_config(pci_dev);
+        pci_dev->state_saved = false;
         pci_fixup_device(pci_fixup_resume_early, pci_dev);
 }
 
@@ -555,6 +557,13 @@ static int pci_pm_resume(struct device *dev)
         struct device_driver *drv = dev->driver;
         int error = 0;
 
+        /*
+         * This is necessary for the suspend error path in which resume is
+         * called without restoring the standard config registers of the device.
+         */
+        if (pci_dev->state_saved)
+                pci_restore_standard_config(pci_dev);
+
         if (pci_has_legacy_pm_support(pci_dev))
                 return pci_legacy_resume(dev);
 
@@ -660,7 +669,10 @@ static int pci_pm_poweroff(struct device *dev)
         if (pci_has_legacy_pm_support(pci_dev))
                 return pci_legacy_suspend(dev, PMSG_HIBERNATE);
 
-        if (drv && drv->pm && drv->pm->poweroff) {
+        if (!drv || !drv->pm)
+                return 0;
+
+        if (drv->pm->poweroff) {
                 error = drv->pm->poweroff(dev);
                 suspend_report_result(drv->pm->poweroff, error);
         }
@@ -710,6 +722,13 @@ static int pci_pm_restore(struct device *dev)
         struct device_driver *drv = dev->driver;
         int error = 0;
 
+        /*
+         * This is necessary for the hibernation error path in which restore is
+         * called without restoring the standard config registers of the device.
+         */
+        if (pci_dev->state_saved)
+                pci_restore_standard_config(pci_dev);
+
         if (pci_has_legacy_pm_support(pci_dev))
                 return pci_legacy_resume(dev);
 
diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c
index 17bd9325a245..48807556b47a 100644
--- a/drivers/pci/pci.c
+++ b/drivers/pci/pci.c
@@ -1393,35 +1393,35 @@ int pci_restore_standard_config(struct pci_dev *dev)
         pci_power_t prev_state;
         int error;
 
-        pci_restore_state(dev);
         pci_update_current_state(dev, PCI_D0);
 
         prev_state = dev->current_state;
         if (prev_state == PCI_D0)
-                return 0;
+                goto Restore;
 
         error = pci_raw_set_power_state(dev, PCI_D0, false);
         if (error)
                 return error;
 
-        if (pci_is_bridge(dev)) {
-                if (prev_state > PCI_D1)
-                        mdelay(PCI_PM_BUS_WAIT);
-        } else {
-                switch(prev_state) {
-                case PCI_D3cold:
-                case PCI_D3hot:
-                        mdelay(pci_pm_d3_delay);
-                        break;
-                case PCI_D2:
-                        udelay(PCI_PM_D2_DELAY);
-                        break;
-                }
+        /*
+         * This assumes that we won't get a bus in B2 or B3 from the BIOS, but
+         * we've made this assumption forever and it appears to be universally
+         * satisfied.
+         */
+        switch(prev_state) {
+        case PCI_D3cold:
+        case PCI_D3hot:
+                mdelay(pci_pm_d3_delay);
+                break;
+        case PCI_D2:
+                udelay(PCI_PM_D2_DELAY);
+                break;
         }
 
         dev->current_state = PCI_D0;
 
-        return 0;
+ Restore:
+        return pci_restore_state(dev);
 }
 
 /**