Merge branch 'linux-next' of git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/pci-2.6

* 'linux-next' of git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/pci-2.6: (27 commits)
  PCI: Don't use dmi_name_in_vendors in quirk
  PCI: remove unused AER functions
  PCI/sysfs: move bus cpuaffinity to class dev_attrs
  PCI: add rescan to /sys/.../pci_bus/.../
  PCI: update bridge resources to get more big ranges when allocating space (again)
  KVM: Use pci_store/load_saved_state() around VM device usage
  PCI: Add interfaces to store and load the device saved state
  PCI: Track the size of each saved capability data area
  PCI/e1000e: Add and use pci_disable_link_state_locked()
  x86/PCI: derive pcibios_last_bus from ACPI MCFG
  PCI: add latency tolerance reporting enable/disable support
  PCI: add OBFF enable/disable support
  PCI: add ID-based ordering enable/disable support
  PCI hotplug: acpiphp: assume device is in state D0 after powering on a slot.
  PCI: Set PCIE maxpayload for card during hotplug insertion
  PCI/ACPI: Report _OSC control mask returned on failure to get control
  x86/PCI: irq and pci_ids patch for Intel Panther Point DeviceIDs
  PCI: handle positive error codes
  PCI: check pci_vpd_pci22_wait() return
  PCI: Use ICH6_GPIO_EN in ich6_lpc_acpi_gpio
  ...

Fix up trivial conflicts in include/linux/pci_ids.h: commit a6e5e2be
moved the intel SMBUS ID definitons to the i2c-i801.c driver.

Documentation/ABI/testing/sysfs-bus-pci

@@ -74,6 +74,15 @@ Description:
 		hot-remove the PCI device and any of its children.
 		Depends on CONFIG_HOTPLUG.
 
+What:		/sys/bus/pci/devices/.../pci_bus/.../rescan
+Date:		May 2011
+Contact:	Linux PCI developers <linux-pci@vger.kernel.org>
+Description:
+		Writing a non-zero value to this attribute will
+		force a rescan of the bus and all child buses,
+		and re-discover devices removed earlier from this
+		part of the device tree.  Depends on CONFIG_HOTPLUG.
+
 What:		/sys/bus/pci/devices/.../rescan
 Date:		January 2009
 Contact:	Linux PCI developers <linux-pci@vger.kernel.org>

arch/x86/include/asm/pci.h

@@ -135,8 +135,6 @@ void default_teardown_msi_irqs(struct pci_dev *dev);
 #include "pci_64.h"
 #endif
 
-void dma32_reserve_bootmem(void);
-
 /* implement the pci_ DMA API in terms of the generic device dma_ one */
 #include <asm-generic/pci-dma-compat.h>
 

arch/x86/kernel/pci-dma.c

@@ -68,74 +68,10 @@ int dma_set_mask(struct device *dev, u64 mask)
 }
 EXPORT_SYMBOL(dma_set_mask);
 
-#if defined(CONFIG_X86_64) && !defined(CONFIG_NUMA)
-static __initdata void *dma32_bootmem_ptr;
-static unsigned long dma32_bootmem_size __initdata = (128ULL<<20);
-
-static int __init parse_dma32_size_opt(char *p)
-{
-	if (!p)
-		return -EINVAL;
-	dma32_bootmem_size = memparse(p, &p);
-	return 0;
-}
-early_param("dma32_size", parse_dma32_size_opt);
-
-void __init dma32_reserve_bootmem(void)
-{
-	unsigned long size, align;
-	if (max_pfn <= MAX_DMA32_PFN)
-		return;
-
-	/*
-	 * check aperture_64.c allocate_aperture() for reason about
-	 * using 512M as goal
-	 */
-	align = 64ULL<<20;
-	size = roundup(dma32_bootmem_size, align);
-	dma32_bootmem_ptr = __alloc_bootmem_nopanic(size, align,
-				 512ULL<<20);
-	/*
-	 * Kmemleak should not scan this block as it may not be mapped via the
-	 * kernel direct mapping.
-	 */
-	kmemleak_ignore(dma32_bootmem_ptr);
-	if (dma32_bootmem_ptr)
-		dma32_bootmem_size = size;
-	else
-		dma32_bootmem_size = 0;
-}
-static void __init dma32_free_bootmem(void)
-{
-
-	if (max_pfn <= MAX_DMA32_PFN)
-		return;
-
-	if (!dma32_bootmem_ptr)
-		return;
-
-	free_bootmem(__pa(dma32_bootmem_ptr), dma32_bootmem_size);
-
-	dma32_bootmem_ptr = NULL;
-	dma32_bootmem_size = 0;
-}
-#else
-void __init dma32_reserve_bootmem(void)
-{
-}
-static void __init dma32_free_bootmem(void)
-{
-}
-
-#endif
-
 void __init pci_iommu_alloc(void)
 {
 	struct iommu_table_entry *p;
 
-	/* free the range so iommu could get some range less than 4G */
-	dma32_free_bootmem();
-
 	sort_iommu_table(__iommu_table, __iommu_table_end);
 	check_iommu_entries(__iommu_table, __iommu_table_end);
 

arch/x86/kernel/setup.c

@@ -964,7 +964,6 @@ void __init setup_arch(char **cmdline_p)
 
 	initmem_init();
 	memblock_find_dma_reserve();
-	dma32_reserve_bootmem();
 
 #ifdef CONFIG_KVM_CLOCK
 	kvmclock_init();

arch/x86/pci/direct.c

@@ -280,12 +280,9 @@ void __init pci_direct_init(int type)
 
 int __init pci_direct_probe(void)
 {
-	struct resource *region, *region2;
-
 	if ((pci_probe & PCI_PROBE_CONF1) == 0)
 		goto type2;
-	region = request_region(0xCF8, 8, "PCI conf1");
-	if (!region)
+	if (!request_region(0xCF8, 8, "PCI conf1"))
 		goto type2;
 
 	if (pci_check_type1()) {
@@ -293,16 +290,14 @@ int __init pci_direct_probe(void)
 		port_cf9_safe = true;
 		return 1;
 	}
-	release_resource(region);
+	release_region(0xCF8, 8);
 
  type2:
 	if ((pci_probe & PCI_PROBE_CONF2) == 0)
 		return 0;
-	region = request_region(0xCF8, 4, "PCI conf2");
-	if (!region)
+	if (!request_region(0xCF8, 4, "PCI conf2"))
 		return 0;
-	region2 = request_region(0xC000, 0x1000, "PCI conf2");
-	if (!region2)
+	if (!request_region(0xC000, 0x1000, "PCI conf2"))
 		goto fail2;
 
 	if (pci_check_type2()) {
@@ -311,8 +306,8 @@ int __init pci_direct_probe(void)
 		return 2;
 	}
 
-	release_resource(region2);
+	release_region(0xC000, 0x1000);
  fail2:
-	release_resource(region);
+	release_region(0xCF8, 4);
 	return 0;
 }

arch/x86/pci/irq.c

@@ -602,7 +602,9 @@ static __init int intel_router_probe(struct irq_router *r, struct pci_dev *route
 	||  (device >= PCI_DEVICE_ID_INTEL_COUGARPOINT_LPC_MIN && 
 	     device <= PCI_DEVICE_ID_INTEL_COUGARPOINT_LPC_MAX)
 	||  (device >= PCI_DEVICE_ID_INTEL_DH89XXCC_LPC_MIN &&
-	     device <= PCI_DEVICE_ID_INTEL_DH89XXCC_LPC_MAX)) {
+	     device <= PCI_DEVICE_ID_INTEL_DH89XXCC_LPC_MAX)
+	||  (device >= PCI_DEVICE_ID_INTEL_PANTHERPOINT_LPC_MIN &&
+	     device <= PCI_DEVICE_ID_INTEL_PANTHERPOINT_LPC_MAX)) {
 		r->name = "PIIX/ICH";
 		r->get = pirq_piix_get;
 		r->set = pirq_piix_set;

arch/x86/pci/mmconfig-shared.c

@@ -606,6 +606,16 @@ static void __init __pci_mmcfg_init(int early)
 	if (list_empty(&pci_mmcfg_list))
 		return;
 
+	if (pcibios_last_bus < 0) {
+		const struct pci_mmcfg_region *cfg;
+
+		list_for_each_entry(cfg, &pci_mmcfg_list, list) {
+			if (cfg->segment)
+				break;
+			pcibios_last_bus = cfg->end_bus;
+		}
+	}
+
 	if (pci_mmcfg_arch_init())
 		pci_probe = (pci_probe & ~PCI_PROBE_MASK) | PCI_PROBE_MMCONF;
 	else {

drivers/acpi/pci_root.c

@@ -596,12 +596,18 @@ static int __devinit acpi_pci_root_add(struct acpi_device *device)
 			dev_info(root->bus->bridge,
 				"ACPI _OSC control (0x%02x) granted\n", flags);
 		} else {
-			dev_dbg(root->bus->bridge,
-				"ACPI _OSC request failed (code %d)\n", status);
-			printk(KERN_INFO "Unable to assume _OSC PCIe control. "
-				"Disabling ASPM\n");
+			dev_info(root->bus->bridge,
+				"ACPI _OSC request failed (%s), "
+				"returned control mask: 0x%02x\n",
+				acpi_format_exception(status), flags);
+			pr_info("ACPI _OSC control for PCIe not granted, "
+				"disabling ASPM\n");
 			pcie_no_aspm();
 		}
+	} else {
+		dev_info(root->bus->bridge,
+			 "Unable to request _OSC control "
+			 "(_OSC support mask: 0x%02x)\n", flags);
 	}
 
 	pci_acpi_add_bus_pm_notifier(device, root->bus);

drivers/i2c/busses/i2c-i801.c

@@ -137,6 +137,7 @@
 /* Older devices have their ID defined in <linux/pci_ids.h> */
 #define PCI_DEVICE_ID_INTEL_COUGARPOINT_SMBUS	0x1c22
 #define PCI_DEVICE_ID_INTEL_PATSBURG_SMBUS	0x1d22
+#define PCI_DEVICE_ID_INTEL_PANTHERPOINT_SMBUS	0x1e22
 /* Patsburg also has three 'Integrated Device Function' SMBus controllers */
 #define PCI_DEVICE_ID_INTEL_PATSBURG_SMBUS_IDF0	0x1d70
 #define PCI_DEVICE_ID_INTEL_PATSBURG_SMBUS_IDF1	0x1d71

drivers/net/e1000e/netdev.c

@@ -5361,7 +5361,7 @@ static void e1000_complete_shutdown(struct pci_dev *pdev, bool sleep,
 #ifdef CONFIG_PCIEASPM
 static void __e1000e_disable_aspm(struct pci_dev *pdev, u16 state)
 {
-	pci_disable_link_state(pdev, state);
+	pci_disable_link_state_locked(pdev, state);
 }
 #else
 static void __e1000e_disable_aspm(struct pci_dev *pdev, u16 state)

drivers/pci/access.c

@@ -143,33 +143,41 @@ static noinline void pci_wait_ucfg(struct pci_dev *dev)
 	__remove_wait_queue(&pci_ucfg_wait, &wait);
 }
 
+/* Returns 0 on success, negative values indicate error. */
 #define PCI_USER_READ_CONFIG(size,type)					\
 int pci_user_read_config_##size						\
 	(struct pci_dev *dev, int pos, type *val)			\
 {									\
 	int ret = 0;							\
 	u32 data = -1;							\
-	if (PCI_##size##_BAD) return PCIBIOS_BAD_REGISTER_NUMBER;	\
+	if (PCI_##size##_BAD)						\
+		return -EINVAL;						\
 	raw_spin_lock_irq(&pci_lock);				\
 	if (unlikely(dev->block_ucfg_access)) pci_wait_ucfg(dev);	\
 	ret = dev->bus->ops->read(dev->bus, dev->devfn,			\
 					pos, sizeof(type), &data);	\
 	raw_spin_unlock_irq(&pci_lock);				\
 	*val = (type)data;						\
+	if (ret > 0)							\
+		ret = -EINVAL;						\
 	return ret;							\
 }
 
+/* Returns 0 on success, negative values indicate error. */
 #define PCI_USER_WRITE_CONFIG(size,type)				\
 int pci_user_write_config_##size					\
 	(struct pci_dev *dev, int pos, type val)			\
 {									\
 	int ret = -EIO;							\
-	if (PCI_##size##_BAD) return PCIBIOS_BAD_REGISTER_NUMBER;	\
+	if (PCI_##size##_BAD)						\
+		return -EINVAL;						\
 	raw_spin_lock_irq(&pci_lock);				\
 	if (unlikely(dev->block_ucfg_access)) pci_wait_ucfg(dev);	\
 	ret = dev->bus->ops->write(dev->bus, dev->devfn,		\
 					pos, sizeof(type), val);	\
 	raw_spin_unlock_irq(&pci_lock);				\
+	if (ret > 0)							\
+		ret = -EINVAL;						\
 	return ret;							\
 }
 
@@ -197,6 +205,8 @@ struct pci_vpd_pci22 {
  * This code has to spin since there is no other notification from the PCI
  * hardware. Since the VPD is often implemented by serial attachment to an
  * EEPROM, it may take many milliseconds to complete.
+ *
+ * Returns 0 on success, negative values indicate error.
  */
 static int pci_vpd_pci22_wait(struct pci_dev *dev)
 {
@@ -212,7 +222,7 @@ static int pci_vpd_pci22_wait(struct pci_dev *dev)
 	for (;;) {
 		ret = pci_user_read_config_word(dev, vpd->cap + PCI_VPD_ADDR,
 						&status);
-		if (ret)
+		if (ret < 0)
 			return ret;
 
 		if ((status & PCI_VPD_ADDR_F) == vpd->flag) {
@@ -324,6 +334,8 @@ static ssize_t pci_vpd_pci22_write(struct pci_dev *dev, loff_t pos, size_t count
 		vpd->busy = true;
 		vpd->flag = 0;
 		ret = pci_vpd_pci22_wait(dev);
+		if (ret < 0)
+			break;
 
 		pos += sizeof(u32);
 	}

drivers/pci/bus.c

@@ -163,12 +163,6 @@ int pci_bus_add_child(struct pci_bus *bus)
 
 	bus->is_added = 1;
 
-	retval = device_create_file(&bus->dev, &dev_attr_cpuaffinity);
-	if (retval)
-		return retval;
-
-	retval = device_create_file(&bus->dev, &dev_attr_cpulistaffinity);
-
 	/* Create legacy_io and legacy_mem files for this bus */
 	pci_create_legacy_files(bus);
 

drivers/pci/hotplug/acpiphp_glue.c

@@ -827,6 +827,13 @@ static int __ref enable_device(struct acpiphp_slot *slot)
 	acpiphp_set_hpp_values(bus);
 	acpiphp_set_acpi_region(slot);
 	pci_enable_bridges(bus);
+
+	list_for_each_entry(dev, &bus->devices, bus_list) {
+		/* Assume that newly added devices are powered on already. */
+		if (!dev->is_added)
+			dev->current_state = PCI_D0;
+	}
+
 	pci_bus_add_devices(bus);
 
 	list_for_each_entry(func, &slot->funcs, sibling) {

drivers/pci/hotplug/pcihp_slot.c

@@ -158,6 +158,47 @@ static void program_hpp_type2(struct pci_dev *dev, struct hpp_type2 *hpp)
 	 */
 }
 
+/* Program PCIE MaxPayload setting on device: ensure parent maxpayload <= device */
+static int pci_set_payload(struct pci_dev *dev)
+{
+       int pos, ppos;
+       u16 pctl, psz;
+       u16 dctl, dsz, dcap, dmax;
+       struct pci_dev *parent;
+
+       parent = dev->bus->self;
+       pos = pci_find_capability(dev, PCI_CAP_ID_EXP);
+       if (!pos)
+               return 0;
+
+       /* Read Device MaxPayload capability and setting */
+       pci_read_config_word(dev, pos + PCI_EXP_DEVCTL, &dctl);
+       pci_read_config_word(dev, pos + PCI_EXP_DEVCAP, &dcap);
+       dsz = (dctl & PCI_EXP_DEVCTL_PAYLOAD) >> 5;
+       dmax = (dcap & PCI_EXP_DEVCAP_PAYLOAD);
+
+       /* Read Parent MaxPayload setting */
+       ppos = pci_find_capability(parent, PCI_CAP_ID_EXP);
+       if (!ppos)
+               return 0;
+       pci_read_config_word(parent, ppos + PCI_EXP_DEVCTL, &pctl);
+       psz = (pctl &  PCI_EXP_DEVCTL_PAYLOAD) >> 5;
+
+       /* If parent payload > device max payload -> error
+        * If parent payload > device payload -> set speed
+        * If parent payload <= device payload -> do nothing
+        */
+       if (psz > dmax)
+               return -1;
+       else if (psz > dsz) {
+               dev_info(&dev->dev, "Setting MaxPayload to %d\n", 128 << psz);
+               pci_write_config_word(dev, pos + PCI_EXP_DEVCTL,
+                                     (dctl & ~PCI_EXP_DEVCTL_PAYLOAD) +
+                                     (psz << 5));
+       }
+       return 0;
+}
+
 void pci_configure_slot(struct pci_dev *dev)
 {
 	struct pci_dev *cdev;
@@ -169,6 +210,10 @@ void pci_configure_slot(struct pci_dev *dev)
 			(dev->class >> 8) == PCI_CLASS_BRIDGE_PCI)))
 		return;
 
+       ret = pci_set_payload(dev);
+       if (ret)
+               dev_warn(&dev->dev, "could not set device max payload\n");
+
 	memset(&hpp, 0, sizeof(hpp));
 	ret = pci_get_hp_params(dev, &hpp);
 	if (ret)

drivers/pci/pci-sysfs.c

@@ -108,6 +108,40 @@ static ssize_t local_cpulist_show(struct device *dev,
 	return len;
 }
 
+/*
+ * PCI Bus Class Devices
+ */
+static ssize_t pci_bus_show_cpuaffinity(struct device *dev,
+					int type,
+					struct device_attribute *attr,
+					char *buf)
+{
+	int ret;
+	const struct cpumask *cpumask;
+
+	cpumask = cpumask_of_pcibus(to_pci_bus(dev));
+	ret = type ?
+		cpulist_scnprintf(buf, PAGE_SIZE-2, cpumask) :
+		cpumask_scnprintf(buf, PAGE_SIZE-2, cpumask);
+	buf[ret++] = '\n';
+	buf[ret] = '\0';
+	return ret;
+}
+
+static inline ssize_t pci_bus_show_cpumaskaffinity(struct device *dev,
+					struct device_attribute *attr,
+					char *buf)
+{
+	return pci_bus_show_cpuaffinity(dev, 0, attr, buf);
+}
+
+static inline ssize_t pci_bus_show_cpulistaffinity(struct device *dev,
+					struct device_attribute *attr,
+					char *buf)
+{
+	return pci_bus_show_cpuaffinity(dev, 1, attr, buf);
+}
+
 /* show resources */
 static ssize_t
 resource_show(struct device * dev, struct device_attribute *attr, char * buf)
@@ -318,6 +352,25 @@ remove_store(struct device *dev, struct device_attribute *dummy,
 		count = ret;
 	return count;
 }
+
+static ssize_t
+dev_bus_rescan_store(struct device *dev, struct device_attribute *attr,
+		 const char *buf, size_t count)
+{
+	unsigned long val;
+	struct pci_bus *bus = to_pci_bus(dev);
+
+	if (strict_strtoul(buf, 0, &val) < 0)
+		return -EINVAL;
+
+	if (val) {
+		mutex_lock(&pci_remove_rescan_mutex);
+		pci_rescan_bus(bus);
+		mutex_unlock(&pci_remove_rescan_mutex);
+	}
+	return count;
+}
+
 #endif
 
 struct device_attribute pci_dev_attrs[] = {
@@ -347,6 +400,15 @@ struct device_attribute pci_dev_attrs[] = {
 	__ATTR_NULL,
 };
 
+struct device_attribute pcibus_dev_attrs[] = {
+#ifdef CONFIG_HOTPLUG
+	__ATTR(rescan, (S_IWUSR|S_IWGRP), NULL, dev_bus_rescan_store),
+#endif
+	__ATTR(cpuaffinity, S_IRUGO, pci_bus_show_cpumaskaffinity, NULL),
+	__ATTR(cpulistaffinity, S_IRUGO, pci_bus_show_cpulistaffinity, NULL),
+	__ATTR_NULL,
+};
+
 static ssize_t
 boot_vga_show(struct device *dev, struct device_attribute *attr, char *buf)
 {

drivers/pci/pci.c

@@ -830,7 +830,7 @@ static int pci_save_pcie_state(struct pci_dev *dev)
 		dev_err(&dev->dev, "buffer not found in %s\n", __func__);
 		return -ENOMEM;
 	}
-	cap = (u16 *)&save_state->data[0];
+	cap = (u16 *)&save_state->cap.data[0];
 
 	pci_read_config_word(dev, pos + PCI_EXP_FLAGS, &flags);
 
@@ -863,7 +863,7 @@ static void pci_restore_pcie_state(struct pci_dev *dev)
 	pos = pci_find_capability(dev, PCI_CAP_ID_EXP);
 	if (!save_state || pos <= 0)
 		return;
-	cap = (u16 *)&save_state->data[0];
+	cap = (u16 *)&save_state->cap.data[0];
 
 	pci_read_config_word(dev, pos + PCI_EXP_FLAGS, &flags);
 
@@ -899,7 +899,8 @@ static int pci_save_pcix_state(struct pci_dev *dev)
 		return -ENOMEM;
 	}
 
-	pci_read_config_word(dev, pos + PCI_X_CMD, (u16 *)save_state->data);
+	pci_read_config_word(dev, pos + PCI_X_CMD,
+			     (u16 *)save_state->cap.data);
 
 	return 0;
 }
@@ -914,7 +915,7 @@ static void pci_restore_pcix_state(struct pci_dev *dev)
 	pos = pci_find_capability(dev, PCI_CAP_ID_PCIX);
 	if (!save_state || pos <= 0)
 		return;
-	cap = (u16 *)&save_state->data[0];
+	cap = (u16 *)&save_state->cap.data[0];
 
 	pci_write_config_word(dev, pos + PCI_X_CMD, cap[i++]);
 }
@@ -975,6 +976,104 @@ void pci_restore_state(struct pci_dev *dev)
 	dev->state_saved = false;
 }
 
+struct pci_saved_state {
+	u32 config_space[16];
+	struct pci_cap_saved_data cap[0];
+};
+
+/**
+ * pci_store_saved_state - Allocate and return an opaque struct containing
+ *			   the device saved state.
+ * @dev: PCI device that we're dealing with
+ *
+ * Rerturn NULL if no state or error.
+ */
+struct pci_saved_state *pci_store_saved_state(struct pci_dev *dev)
+{
+	struct pci_saved_state *state;
+	struct pci_cap_saved_state *tmp;
+	struct pci_cap_saved_data *cap;
+	struct hlist_node *pos;
+	size_t size;
+
+	if (!dev->state_saved)
+		return NULL;
+
+	size = sizeof(*state) + sizeof(struct pci_cap_saved_data);
+
+	hlist_for_each_entry(tmp, pos, &dev->saved_cap_space, next)
+		size += sizeof(struct pci_cap_saved_data) + tmp->cap.size;
+
+	state = kzalloc(size, GFP_KERNEL);
+	if (!state)
+		return NULL;
+
+	memcpy(state->config_space, dev->saved_config_space,
+	       sizeof(state->config_space));
+
+	cap = state->cap;
+	hlist_for_each_entry(tmp, pos, &dev->saved_cap_space, next) {
+		size_t len = sizeof(struct pci_cap_saved_data) + tmp->cap.size;
+		memcpy(cap, &tmp->cap, len);
+		cap = (struct pci_cap_saved_data *)((u8 *)cap + len);
+	}
+	/* Empty cap_save terminates list */
+
+	return state;
+}
+EXPORT_SYMBOL_GPL(pci_store_saved_state);
+
+/**
+ * pci_load_saved_state - Reload the provided save state into struct pci_dev.
+ * @dev: PCI device that we're dealing with
+ * @state: Saved state returned from pci_store_saved_state()
+ */
+int pci_load_saved_state(struct pci_dev *dev, struct pci_saved_state *state)
+{
+	struct pci_cap_saved_data *cap;
+
+	dev->state_saved = false;
+
+	if (!state)
+		return 0;
+
+	memcpy(dev->saved_config_space, state->config_space,
+	       sizeof(state->config_space));
+
+	cap = state->cap;
+	while (cap->size) {
+		struct pci_cap_saved_state *tmp;
+
+		tmp = pci_find_saved_cap(dev, cap->cap_nr);
+		if (!tmp || tmp->cap.size != cap->size)
+			return -EINVAL;
+
+		memcpy(tmp->cap.data, cap->data, tmp->cap.size);
+		cap = (struct pci_cap_saved_data *)((u8 *)cap +
+		       sizeof(struct pci_cap_saved_data) + cap->size);
+	}
+
+	dev->state_saved = true;
+	return 0;
+}
+EXPORT_SYMBOL_GPL(pci_load_saved_state);
+
+/**
+ * pci_load_and_free_saved_state - Reload the save state pointed to by state,
+ *				   and free the memory allocated for it.
+ * @dev: PCI device that we're dealing with
+ * @state: Pointer to saved state returned from pci_store_saved_state()
+ */
+int pci_load_and_free_saved_state(struct pci_dev *dev,
+				  struct pci_saved_state **state)
+{
+	int ret = pci_load_saved_state(dev, *state);
+	kfree(*state);
+	*state = NULL;
+	return ret;
+}
+EXPORT_SYMBOL_GPL(pci_load_and_free_saved_state);
+
 static int do_pci_enable_device(struct pci_dev *dev, int bars)
 {
 	int err;
@@ -1771,7 +1870,8 @@ static int pci_add_cap_save_buffer(
 	if (!save_state)
 		return -ENOMEM;
 
-	save_state->cap_nr = cap;
+	save_state->cap.cap_nr = cap;
+	save_state->cap.size = size;
 	pci_add_saved_cap(dev, save_state);
 
 	return 0;
@@ -1834,6 +1934,300 @@ void pci_enable_ari(struct pci_dev *dev)
 	bridge->ari_enabled = 1;
 }
 
+/**
+ * pci_enable_ido - enable ID-based ordering on a device
+ * @dev: the PCI device
+ * @type: which types of IDO to enable
+ *
+ * Enable ID-based ordering on @dev.  @type can contain the bits
+ * %PCI_EXP_IDO_REQUEST and/or %PCI_EXP_IDO_COMPLETION to indicate
+ * which types of transactions are allowed to be re-ordered.
+ */
+void pci_enable_ido(struct pci_dev *dev, unsigned long type)
+{
+	int pos;
+	u16 ctrl;
+
+	pos = pci_pcie_cap(dev);
+	if (!pos)
+		return;
+
+	pci_read_config_word(dev, pos + PCI_EXP_DEVCTL2, &ctrl);
+	if (type & PCI_EXP_IDO_REQUEST)
+		ctrl |= PCI_EXP_IDO_REQ_EN;
+	if (type & PCI_EXP_IDO_COMPLETION)
+		ctrl |= PCI_EXP_IDO_CMP_EN;
+	pci_write_config_word(dev, pos + PCI_EXP_DEVCTL2, ctrl);
+}
+EXPORT_SYMBOL(pci_enable_ido);
+
+/**
+ * pci_disable_ido - disable ID-based ordering on a device
+ * @dev: the PCI device
+ * @type: which types of IDO to disable
+ */
+void pci_disable_ido(struct pci_dev *dev, unsigned long type)
+{
+	int pos;
+	u16 ctrl;
+
+	if (!pci_is_pcie(dev))
+		return;
+
+	pos = pci_pcie_cap(dev);
+	if (!pos)
+		return;
+
+	pci_read_config_word(dev, pos + PCI_EXP_DEVCTL2, &ctrl);
+	if (type & PCI_EXP_IDO_REQUEST)
+		ctrl &= ~PCI_EXP_IDO_REQ_EN;
+	if (type & PCI_EXP_IDO_COMPLETION)
+		ctrl &= ~PCI_EXP_IDO_CMP_EN;
+	pci_write_config_word(dev, pos + PCI_EXP_DEVCTL2, ctrl);
+}
+EXPORT_SYMBOL(pci_disable_ido);
+
+/**
+ * pci_enable_obff - enable optimized buffer flush/fill
+ * @dev: PCI device
+ * @type: type of signaling to use
+ *
+ * Try to enable @type OBFF signaling on @dev.  It will try using WAKE#
+ * signaling if possible, falling back to message signaling only if
+ * WAKE# isn't supported.  @type should indicate whether the PCIe link
+ * be brought out of L0s or L1 to send the message.  It should be either
+ * %PCI_EXP_OBFF_SIGNAL_ALWAYS or %PCI_OBFF_SIGNAL_L0.
+ *
+ * If your device can benefit from receiving all messages, even at the
+ * power cost of bringing the link back up from a low power state, use
+ * %PCI_EXP_OBFF_SIGNAL_ALWAYS.  Otherwise, use %PCI_OBFF_SIGNAL_L0 (the
+ * preferred type).
+ *
+ * RETURNS:
+ * Zero on success, appropriate error number on failure.
+ */
+int pci_enable_obff(struct pci_dev *dev, enum pci_obff_signal_type type)
+{
+	int pos;
+	u32 cap;
+	u16 ctrl;
+	int ret;
+
+	if (!pci_is_pcie(dev))
+		return -ENOTSUPP;
+
+	pos = pci_pcie_cap(dev);
+	if (!pos)
+		return -ENOTSUPP;
+
+	pci_read_config_dword(dev, pos + PCI_EXP_DEVCAP2, &cap);
+	if (!(cap & PCI_EXP_OBFF_MASK))
+		return -ENOTSUPP; /* no OBFF support at all */
+
+	/* Make sure the topology supports OBFF as well */
+	if (dev->bus) {
+		ret = pci_enable_obff(dev->bus->self, type);
+		if (ret)
+			return ret;
+	}
+
+	pci_read_config_word(dev, pos + PCI_EXP_DEVCTL2, &ctrl);
+	if (cap & PCI_EXP_OBFF_WAKE)
+		ctrl |= PCI_EXP_OBFF_WAKE_EN;
+	else {
+		switch (type) {
+		case PCI_EXP_OBFF_SIGNAL_L0:
+			if (!(ctrl & PCI_EXP_OBFF_WAKE_EN))
+				ctrl |= PCI_EXP_OBFF_MSGA_EN;
+			break;
+		case PCI_EXP_OBFF_SIGNAL_ALWAYS:
+			ctrl &= ~PCI_EXP_OBFF_WAKE_EN;
+			ctrl |= PCI_EXP_OBFF_MSGB_EN;
+			break;
+		default:
+			WARN(1, "bad OBFF signal type\n");
+			return -ENOTSUPP;
+		}
+	}
+	pci_write_config_word(dev, pos + PCI_EXP_DEVCTL2, ctrl);
+
+	return 0;
+}
+EXPORT_SYMBOL(pci_enable_obff);
+
+/**
+ * pci_disable_obff - disable optimized buffer flush/fill
+ * @dev: PCI device
+ *
+ * Disable OBFF on @dev.
+ */
+void pci_disable_obff(struct pci_dev *dev)
+{
+	int pos;
+	u16 ctrl;
+
+	if (!pci_is_pcie(dev))
+		return;
+
+	pos = pci_pcie_cap(dev);
+	if (!pos)
+		return;
+
+	pci_read_config_word(dev, pos + PCI_EXP_DEVCTL2, &ctrl);
+	ctrl &= ~PCI_EXP_OBFF_WAKE_EN;
+	pci_write_config_word(dev, pos + PCI_EXP_DEVCTL2, ctrl);
+}
+EXPORT_SYMBOL(pci_disable_obff);
+
+/**
+ * pci_ltr_supported - check whether a device supports LTR
+ * @dev: PCI device
+ *
+ * RETURNS:
+ * True if @dev supports latency tolerance reporting, false otherwise.
+ */
+bool pci_ltr_supported(struct pci_dev *dev)
+{
+	int pos;
+	u32 cap;
+
+	if (!pci_is_pcie(dev))
+		return false;
+
+	pos = pci_pcie_cap(dev);
+	if (!pos)
+		return false;
+
+	pci_read_config_dword(dev, pos + PCI_EXP_DEVCAP2, &cap);
+
+	return cap & PCI_EXP_DEVCAP2_LTR;
+}
+EXPORT_SYMBOL(pci_ltr_supported);
+
+/**
+ * pci_enable_ltr - enable latency tolerance reporting
+ * @dev: PCI device
+ *
+ * Enable LTR on @dev if possible, which means enabling it first on
+ * upstream ports.
+ *
+ * RETURNS:
+ * Zero on success, errno on failure.
+ */
+int pci_enable_ltr(struct pci_dev *dev)
+{
+	int pos;
+	u16 ctrl;
+	int ret;
+
+	if (!pci_ltr_supported(dev))
+		return -ENOTSUPP;
+
+	pos = pci_pcie_cap(dev);
+	if (!pos)
+		return -ENOTSUPP;
+
+	/* Only primary function can enable/disable LTR */
+	if (PCI_FUNC(dev->devfn) != 0)
+		return -EINVAL;
+
+	/* Enable upstream ports first */
+	if (dev->bus) {
+		ret = pci_enable_ltr(dev->bus->self);
+		if (ret)
+			return ret;
+	}
+
+	pci_read_config_word(dev, pos + PCI_EXP_DEVCTL2, &ctrl);
+	ctrl |= PCI_EXP_LTR_EN;
+	pci_write_config_word(dev, pos + PCI_EXP_DEVCTL2, ctrl);
+
+	return 0;
+}
+EXPORT_SYMBOL(pci_enable_ltr);
+
+/**
+ * pci_disable_ltr - disable latency tolerance reporting
+ * @dev: PCI device
+ */
+void pci_disable_ltr(struct pci_dev *dev)
+{
+	int pos;
+	u16 ctrl;
+
+	if (!pci_ltr_supported(dev))
+		return;
+
+	pos = pci_pcie_cap(dev);
+	if (!pos)
+		return;
+
+	/* Only primary function can enable/disable LTR */
+	if (PCI_FUNC(dev->devfn) != 0)
+		return;
+
+	pci_read_config_word(dev, pos + PCI_EXP_DEVCTL2, &ctrl);
+	ctrl &= ~PCI_EXP_LTR_EN;
+	pci_write_config_word(dev, pos + PCI_EXP_DEVCTL2, ctrl);
+}
+EXPORT_SYMBOL(pci_disable_ltr);
+
+static int __pci_ltr_scale(int *val)
+{
+	int scale = 0;
+
+	while (*val > 1023) {
+		*val = (*val + 31) / 32;
+		scale++;
+	}
+	return scale;
+}
+
+/**
+ * pci_set_ltr - set LTR latency values
+ * @dev: PCI device
+ * @snoop_lat_ns: snoop latency in nanoseconds
+ * @nosnoop_lat_ns: nosnoop latency in nanoseconds
+ *
+ * Figure out the scale and set the LTR values accordingly.
+ */
+int pci_set_ltr(struct pci_dev *dev, int snoop_lat_ns, int nosnoop_lat_ns)
+{
+	int pos, ret, snoop_scale, nosnoop_scale;
+	u16 val;
+
+	if (!pci_ltr_supported(dev))
+		return -ENOTSUPP;
+
+	snoop_scale = __pci_ltr_scale(&snoop_lat_ns);
+	nosnoop_scale = __pci_ltr_scale(&nosnoop_lat_ns);
+
+	if (snoop_lat_ns > PCI_LTR_VALUE_MASK ||
+	    nosnoop_lat_ns > PCI_LTR_VALUE_MASK)
+		return -EINVAL;
+
+	if ((snoop_scale > (PCI_LTR_SCALE_MASK >> PCI_LTR_SCALE_SHIFT)) ||
+	    (nosnoop_scale > (PCI_LTR_SCALE_MASK >> PCI_LTR_SCALE_SHIFT)))
+		return -EINVAL;
+
+	pos = pci_find_ext_capability(dev, PCI_EXT_CAP_ID_LTR);
+	if (!pos)
+		return -ENOTSUPP;
+
+	val = (snoop_scale << PCI_LTR_SCALE_SHIFT) | snoop_lat_ns;
+	ret = pci_write_config_word(dev, pos + PCI_LTR_MAX_SNOOP_LAT, val);
+	if (ret != 4)
+		return -EIO;
+
+	val = (nosnoop_scale << PCI_LTR_SCALE_SHIFT) | nosnoop_lat_ns;
+	ret = pci_write_config_word(dev, pos + PCI_LTR_MAX_NOSNOOP_LAT, val);
+	if (ret != 4)
+		return -EIO;
+
+	return 0;
+}
+EXPORT_SYMBOL(pci_set_ltr);
+
 static int pci_acs_enable;
 
 /**
@@ -2479,6 +2873,21 @@ static int pci_af_flr(struct pci_dev *dev, int probe)
 	return 0;
 }
 
+/**
+ * pci_pm_reset - Put device into PCI_D3 and back into PCI_D0.
+ * @dev: Device to reset.
+ * @probe: If set, only check if the device can be reset this way.
+ *
+ * If @dev supports native PCI PM and its PCI_PM_CTRL_NO_SOFT_RESET flag is
+ * unset, it will be reinitialized internally when going from PCI_D3hot to
+ * PCI_D0.  If that's the case and the device is not in a low-power state
+ * already, force it into PCI_D3hot and back to PCI_D0, causing it to be reset.
+ *
+ * NOTE: This causes the caller to sleep for twice the device power transition
+ * cooldown period, which for the D0->D3hot and D3hot->D0 transitions is 10 ms
+ * by devault (i.e. unless the @dev's d3_delay field has a different value).
+ * Moreover, only devices in D0 can be reset by this function.
+ */
 static int pci_pm_reset(struct pci_dev *dev, int probe)
 {
 	u16 csr;

drivers/pci/pci.h

@@ -156,8 +156,7 @@ static inline int pci_no_d1d2(struct pci_dev *dev)
 
 }
 extern struct device_attribute pci_dev_attrs[];
-extern struct device_attribute dev_attr_cpuaffinity;
-extern struct device_attribute dev_attr_cpulistaffinity;
+extern struct device_attribute pcibus_dev_attrs[];
 #ifdef CONFIG_HOTPLUG
 extern struct bus_attribute pci_bus_attrs[];
 #else

drivers/pci/pcie/aer/aer_inject.c

@@ -326,7 +326,7 @@ static int aer_inject(struct aer_error_inj *einj)
 	unsigned long flags;
 	unsigned int devfn = PCI_DEVFN(einj->dev, einj->fn);
 	int pos_cap_err, rp_pos_cap_err;
-	u32 sever, cor_mask, uncor_mask, cor_mask_orig, uncor_mask_orig;
+	u32 sever, cor_mask, uncor_mask, cor_mask_orig = 0, uncor_mask_orig = 0;
 	int ret = 0;
 
 	dev = pci_get_domain_bus_and_slot((int)einj->domain, einj->bus, devfn);

drivers/pci/pcie/aer/aerdrv.h

@@ -114,15 +114,6 @@ extern void aer_print_error(struct pci_dev *dev, struct aer_err_info *info);
 extern void aer_print_port_info(struct pci_dev *dev, struct aer_err_info *info);
 extern irqreturn_t aer_irq(int irq, void *context);
 
-#ifdef CONFIG_ACPI
-extern int aer_osc_setup(struct pcie_device *pciedev);
-#else
-static inline int aer_osc_setup(struct pcie_device *pciedev)
-{
-	return 0;
-}
-#endif
-
 #ifdef CONFIG_ACPI_APEI
 extern int pcie_aer_get_firmware_first(struct pci_dev *pci_dev);
 #else

drivers/pci/pcie/aspm.c

@@ -608,7 +608,7 @@ void pcie_aspm_init_link_state(struct pci_dev *pdev)
 	 * the BIOS's expectation, we'll do so once pci_enable_device() is
 	 * called.
 	 */
-	if (aspm_policy != POLICY_POWERSAVE) {
+	if (aspm_policy != POLICY_POWERSAVE || aspm_clear_state) {
 		pcie_config_aspm_path(link);
 		pcie_set_clkpm(link, policy_to_clkpm_state(link));
 	}
@@ -734,7 +734,7 @@ void pcie_aspm_powersave_config_link(struct pci_dev *pdev)
  * pci_disable_link_state - disable pci device's link state, so the link will
  * never enter specific states
  */
-void pci_disable_link_state(struct pci_dev *pdev, int state)
+static void __pci_disable_link_state(struct pci_dev *pdev, int state, bool sem)
 {
 	struct pci_dev *parent = pdev->bus->self;
 	struct pcie_link_state *link;
@@ -747,6 +747,7 @@ void pci_disable_link_state(struct pci_dev *pdev, int state)
 	if (!parent || !parent->link_state)
 		return;
 
+	if (sem)
 		down_read(&pci_bus_sem);
 	mutex_lock(&aspm_lock);
 	link = parent->link_state;
@@ -761,8 +762,20 @@ void pci_disable_link_state(struct pci_dev *pdev, int state)
 		pcie_set_clkpm(link, 0);
 	}
 	mutex_unlock(&aspm_lock);
+	if (sem)
 		up_read(&pci_bus_sem);
 }
+
+void pci_disable_link_state_locked(struct pci_dev *pdev, int state)
+{
+	__pci_disable_link_state(pdev, state, false);
+}
+EXPORT_SYMBOL(pci_disable_link_state_locked);
+
+void pci_disable_link_state(struct pci_dev *pdev, int state)
+{
+	__pci_disable_link_state(pdev, state, true);
+}
 EXPORT_SYMBOL(pci_disable_link_state);
 
 static int pcie_aspm_set_policy(const char *val, struct kernel_param *kp)

drivers/pci/probe.c

@@ -42,43 +42,6 @@ int no_pci_devices(void)
 }
 EXPORT_SYMBOL(no_pci_devices);
 
-/*
- * PCI Bus Class Devices
- */
-static ssize_t pci_bus_show_cpuaffinity(struct device *dev,
-					int type,
-					struct device_attribute *attr,
-					char *buf)
-{
-	int ret;
-	const struct cpumask *cpumask;
-
-	cpumask = cpumask_of_pcibus(to_pci_bus(dev));
-	ret = type?
-		cpulist_scnprintf(buf, PAGE_SIZE-2, cpumask) :
-		cpumask_scnprintf(buf, PAGE_SIZE-2, cpumask);
-	buf[ret++] = '\n';
-	buf[ret] = '\0';
-	return ret;
-}
-
-static ssize_t inline pci_bus_show_cpumaskaffinity(struct device *dev,
-					struct device_attribute *attr,
-					char *buf)
-{
-	return pci_bus_show_cpuaffinity(dev, 0, attr, buf);
-}
-
-static ssize_t inline pci_bus_show_cpulistaffinity(struct device *dev,
-					struct device_attribute *attr,
-					char *buf)
-{
-	return pci_bus_show_cpuaffinity(dev, 1, attr, buf);
-}
-
-DEVICE_ATTR(cpuaffinity,     S_IRUGO, pci_bus_show_cpumaskaffinity, NULL);
-DEVICE_ATTR(cpulistaffinity, S_IRUGO, pci_bus_show_cpulistaffinity, NULL);
-
 /*
  * PCI Bus Class
  */
@@ -95,6 +58,7 @@ static void release_pcibus_dev(struct device *dev)
 static struct class pcibus_class = {
 	.name		= "pci_bus",
 	.dev_release	= &release_pcibus_dev,
+	.dev_attrs	= pcibus_dev_attrs,
 };
 
 static int __init pcibus_class_init(void)
@@ -1455,9 +1419,6 @@ struct pci_bus * pci_create_bus(struct device *parent,
 	error = device_register(&b->dev);
 	if (error)
 		goto class_dev_reg_err;
-	error = device_create_file(&b->dev, &dev_attr_cpuaffinity);
-	if (error)
-		goto dev_create_file_err;
 
 	/* Create legacy_io and legacy_mem files for this bus */
 	pci_create_legacy_files(b);
@@ -1468,8 +1429,6 @@ struct pci_bus * pci_create_bus(struct device *parent,
 
 	return b;
 
-dev_create_file_err:
-	device_unregister(&b->dev);
 class_dev_reg_err:
 	device_unregister(dev);
 dev_reg_err:

drivers/pci/quirks.c

@@ -606,7 +606,7 @@ static void __devinit ich6_lpc_acpi_gpio(struct pci_dev *dev)
 	}
 
 	pci_read_config_byte(dev, ICH6_GPIO_CNTL, &enable);
-	if (enable & ICH4_GPIO_EN) {
+	if (enable & ICH6_GPIO_EN) {
 		pci_read_config_dword(dev, ICH6_GPIOBASE, &region);
 		region &= PCI_BASE_ADDRESS_IO_MASK;
 		if (region >= PCIBIOS_MIN_IO)
@@ -681,7 +681,7 @@ static void __devinit ich7_lpc_generic_decode(struct pci_dev *dev, unsigned reg,
 /* ICH7-10 has the same common LPC generic IO decode registers */
 static void __devinit quirk_ich7_lpc(struct pci_dev *dev)
 {
-	/* We share the common ACPI/DPIO decode with ICH6 */
+	/* We share the common ACPI/GPIO decode with ICH6 */
 	ich6_lpc_acpi_gpio(dev);
 
 	/* And have 4 ICH7+ generic decodes */
@@ -2349,8 +2349,11 @@ DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_8132_BRIDGE,
  */
 static void __devinit nvenet_msi_disable(struct pci_dev *dev)
 {
-	if (dmi_name_in_vendors("P5N32-SLI PREMIUM") ||
-	    dmi_name_in_vendors("P5N32-E SLI")) {
+	const char *board_name = dmi_get_system_info(DMI_BOARD_NAME);
+
+	if (board_name &&
+	    (strstr(board_name, "P5N32-SLI PREMIUM") ||
+	     strstr(board_name, "P5N32-E SLI"))) {
 		dev_info(&dev->dev,
 			 "Disabling msi for MCP55 NIC on P5N32-SLI\n");
 		dev->no_msi = 1;
@@ -2784,6 +2787,16 @@ DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_INTEL, 0x342e, vtd_mask_spec_errors);
 DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_INTEL, 0x3c28, vtd_mask_spec_errors);
 #endif
 
+static void __devinit fixup_ti816x_class(struct pci_dev* dev)
+{
+	/* TI 816x devices do not have class code set when in PCIe boot mode */
+	if (dev->class == PCI_CLASS_NOT_DEFINED) {
+		dev_info(&dev->dev, "Setting PCI class for 816x PCIe device\n");
+		dev->class = PCI_CLASS_MULTIMEDIA_VIDEO;
+	}
+}
+DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_TI, 0xb800, fixup_ti816x_class);
+
 static void pci_do_fixups(struct pci_dev *dev, struct pci_fixup *f,
 			  struct pci_fixup *end)
 {

drivers/pci/remove.c

@@ -73,8 +73,6 @@ void pci_remove_bus(struct pci_bus *pci_bus)
 		return;
 
 	pci_remove_legacy_files(pci_bus);
-	device_remove_file(&pci_bus->dev, &dev_attr_cpuaffinity);
-	device_remove_file(&pci_bus->dev, &dev_attr_cpulistaffinity);
 	device_unregister(&pci_bus->dev);
 }
 EXPORT_SYMBOL(pci_remove_bus);

drivers/pci/setup-bus.c

@@ -991,30 +991,139 @@ static void pci_bus_dump_resources(struct pci_bus *bus)
 	}
 }
 
+static int __init pci_bus_get_depth(struct pci_bus *bus)
+{
+	int depth = 0;
+	struct pci_dev *dev;
+
+	list_for_each_entry(dev, &bus->devices, bus_list) {
+		int ret;
+		struct pci_bus *b = dev->subordinate;
+		if (!b)
+			continue;
+
+		ret = pci_bus_get_depth(b);
+		if (ret + 1 > depth)
+			depth = ret + 1;
+	}
+
+	return depth;
+}
+static int __init pci_get_max_depth(void)
+{
+	int depth = 0;
+	struct pci_bus *bus;
+
+	list_for_each_entry(bus, &pci_root_buses, node) {
+		int ret;
+
+		ret = pci_bus_get_depth(bus);
+		if (ret > depth)
+			depth = ret;
+	}
+
+	return depth;
+}
+
+/*
+ * first try will not touch pci bridge res
+ * second  and later try will clear small leaf bridge res
+ * will stop till to the max  deepth if can not find good one
+ */
 void __init
 pci_assign_unassigned_resources(void)
 {
 	struct pci_bus *bus;
 	struct resource_list_x add_list; /* list of resources that
 					want additional resources */
+	int tried_times = 0;
+	enum release_type rel_type = leaf_only;
+	struct resource_list_x head, *list;
+	unsigned long type_mask = IORESOURCE_IO | IORESOURCE_MEM |
+				  IORESOURCE_PREFETCH;
+	unsigned long failed_type;
+	int max_depth = pci_get_max_depth();
+	int pci_try_num;
+
+
+	head.next = NULL;
 	add_list.next = NULL;
+
+	pci_try_num = max_depth + 1;
+	printk(KERN_DEBUG "PCI: max bus depth: %d pci_try_num: %d\n",
+		 max_depth, pci_try_num);
+
+again:
 	/* Depth first, calculate sizes and alignments of all
 	   subordinate buses. */
-	list_for_each_entry(bus, &pci_root_buses, node) {
+	list_for_each_entry(bus, &pci_root_buses, node)
 		__pci_bus_size_bridges(bus, &add_list);
-	}
 
 	/* Depth last, allocate resources and update the hardware. */
-	list_for_each_entry(bus, &pci_root_buses, node) {
-		__pci_bus_assign_resources(bus, &add_list, NULL);
-		pci_enable_bridges(bus);
-	}
+	list_for_each_entry(bus, &pci_root_buses, node)
+		__pci_bus_assign_resources(bus, &add_list, &head);
 	BUG_ON(add_list.next);
+	tried_times++;
+
+	/* any device complain? */
+	if (!head.next)
+		goto enable_and_dump;
+	failed_type = 0;
+	for (list = head.next; list;) {
+		failed_type |= list->flags;
+		list = list->next;
+	}
+	/*
+	 * io port are tight, don't try extra
+	 * or if reach the limit, don't want to try more
+	 */
+	failed_type &= type_mask;
+	if ((failed_type == IORESOURCE_IO) || (tried_times >= pci_try_num)) {
+		free_list(resource_list_x, &head);
+		goto enable_and_dump;
+	}
+
+	printk(KERN_DEBUG "PCI: No. %d try to assign unassigned res\n",
+			 tried_times + 1);
+
+	/* third times and later will not check if it is leaf */
+	if ((tried_times + 1) > 2)
+		rel_type = whole_subtree;
+
+	/*
+	 * Try to release leaf bridge's resources that doesn't fit resource of
+	 * child device under that bridge
+	 */
+	for (list = head.next; list;) {
+		bus = list->dev->bus;
+		pci_bus_release_bridge_resources(bus, list->flags & type_mask,
+						  rel_type);
+		list = list->next;
+	}
+	/* restore size and flags */
+	for (list = head.next; list;) {
+		struct resource *res = list->res;
+
+		res->start = list->start;
+		res->end = list->end;
+		res->flags = list->flags;
+		if (list->dev->subordinate)
+			res->flags = 0;
+
+		list = list->next;
+	}
+	free_list(resource_list_x, &head);
+
+	goto again;
+
+enable_and_dump:
+	/* Depth last, update the hardware. */
+	list_for_each_entry(bus, &pci_root_buses, node)
+		pci_enable_bridges(bus);
 
 	/* dump the resource on buses */
-	list_for_each_entry(bus, &pci_root_buses, node) {
+	list_for_each_entry(bus, &pci_root_buses, node)
 		pci_bus_dump_resources(bus);
-	}
 }
 
 void pci_assign_unassigned_bridge_resources(struct pci_dev *bridge)

include/linux/kvm_host.h

@@ -517,6 +517,7 @@ struct kvm_assigned_dev_kernel {
 	struct kvm *kvm;
 	spinlock_t intx_lock;
 	char irq_name[32];
+	struct pci_saved_state *pci_saved_state;
 };
 
 struct kvm_irq_mask_notifier {

include/linux/pci-aspm.h

@@ -28,6 +28,7 @@ extern void pcie_aspm_exit_link_state(struct pci_dev *pdev);
 extern void pcie_aspm_pm_state_change(struct pci_dev *pdev);
 extern void pcie_aspm_powersave_config_link(struct pci_dev *pdev);
 extern void pci_disable_link_state(struct pci_dev *pdev, int state);
+extern void pci_disable_link_state_locked(struct pci_dev *pdev, int state);
 extern void pcie_clear_aspm(void);
 extern void pcie_no_aspm(void);
 #else

include/linux/pci.h

@@ -214,12 +214,17 @@ enum pci_bus_speed {
 	PCI_SPEED_UNKNOWN		= 0xff,
 };
 
-struct pci_cap_saved_state {
-	struct hlist_node next;
+struct pci_cap_saved_data {
 	char cap_nr;
+	unsigned int size;
 	u32 data[0];
 };
 
+struct pci_cap_saved_state {
+	struct hlist_node next;
+	struct pci_cap_saved_data cap;
+};
+
 struct pcie_link_state;
 struct pci_vpd;
 struct pci_sriov;
@@ -366,7 +371,7 @@ static inline struct pci_cap_saved_state *pci_find_saved_cap(
 	struct hlist_node *pos;
 
 	hlist_for_each_entry(tmp, pos, &pci_dev->saved_cap_space, next) {
-		if (tmp->cap_nr == cap)
+		if (tmp->cap.cap_nr == cap)
 			return tmp;
 	}
 	return NULL;
@@ -807,6 +812,10 @@ size_t pci_get_rom_size(struct pci_dev *pdev, void __iomem *rom, size_t size);
 /* Power management related routines */
 int pci_save_state(struct pci_dev *dev);
 void pci_restore_state(struct pci_dev *dev);
+struct pci_saved_state *pci_store_saved_state(struct pci_dev *dev);
+int pci_load_saved_state(struct pci_dev *dev, struct pci_saved_state *state);
+int pci_load_and_free_saved_state(struct pci_dev *dev,
+				  struct pci_saved_state **state);
 int __pci_complete_power_transition(struct pci_dev *dev, pci_power_t state);
 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);
@@ -828,6 +837,23 @@ static inline int pci_enable_wake(struct pci_dev *dev, pci_power_t state,
 	return __pci_enable_wake(dev, state, false, enable);
 }
 
+#define PCI_EXP_IDO_REQUEST	(1<<0)
+#define PCI_EXP_IDO_COMPLETION	(1<<1)
+void pci_enable_ido(struct pci_dev *dev, unsigned long type);
+void pci_disable_ido(struct pci_dev *dev, unsigned long type);
+
+enum pci_obff_signal_type {
+	PCI_EXP_OBFF_SIGNAL_L0,
+	PCI_EXP_OBFF_SIGNAL_ALWAYS,
+};
+int pci_enable_obff(struct pci_dev *dev, enum pci_obff_signal_type);
+void pci_disable_obff(struct pci_dev *dev);
+
+bool pci_ltr_supported(struct pci_dev *dev);
+int pci_enable_ltr(struct pci_dev *dev);
+void pci_disable_ltr(struct pci_dev *dev);
+int pci_set_ltr(struct pci_dev *dev, int snoop_lat_ns, int nosnoop_lat_ns);
+
 /* For use by arch with custom probe code */
 void set_pcie_port_type(struct pci_dev *pdev);
 void set_pcie_hotplug_bridge(struct pci_dev *pdev);
@@ -1207,6 +1233,23 @@ static inline int pci_enable_wake(struct pci_dev *dev, pci_power_t state,
 	return 0;
 }
 
+static inline void pci_enable_ido(struct pci_dev *dev, unsigned long type)
+{
+}
+
+static inline void pci_disable_ido(struct pci_dev *dev, unsigned long type)
+{
+}
+
+static inline int pci_enable_obff(struct pci_dev *dev, unsigned long type)
+{
+	return 0;
+}
+
+static inline void pci_disable_obff(struct pci_dev *dev)
+{
+}
+
 static inline int pci_request_regions(struct pci_dev *dev, const char *res_name)
 {
 	return -EIO;

include/linux/pci_ids.h

@@ -2483,6 +2483,8 @@
 #define PCI_DEVICE_ID_INTEL_COUGARPOINT_LPC_MAX	0x1c5f
 #define PCI_DEVICE_ID_INTEL_PATSBURG_LPC_0	0x1d40
 #define PCI_DEVICE_ID_INTEL_PATSBURG_LPC_1	0x1d41
+#define PCI_DEVICE_ID_INTEL_PANTHERPOINT_LPC_MIN	0x1e40
+#define PCI_DEVICE_ID_INTEL_PANTHERPOINT_LPC_MAX	0x1e5f
 #define PCI_DEVICE_ID_INTEL_DH89XXCC_LPC_MIN	0x2310
 #define PCI_DEVICE_ID_INTEL_DH89XXCC_LPC_MAX	0x231f
 #define PCI_DEVICE_ID_INTEL_82801AA_0	0x2410

include/linux/pci_regs.h

@@ -508,8 +508,18 @@
 #define PCI_EXP_RTSTA_PENDING	0x20000 /* PME pending */
 #define PCI_EXP_DEVCAP2		36	/* Device Capabilities 2 */
 #define  PCI_EXP_DEVCAP2_ARI	0x20	/* Alternative Routing-ID */
+#define  PCI_EXP_DEVCAP2_LTR	0x800	/* Latency tolerance reporting */
+#define  PCI_EXP_OBFF_MASK	0xc0000 /* OBFF support mechanism */
+#define  PCI_EXP_OBFF_MSG	0x40000 /* New message signaling */
+#define  PCI_EXP_OBFF_WAKE	0x80000 /* Re-use WAKE# for OBFF */
 #define PCI_EXP_DEVCTL2		40	/* Device Control 2 */
 #define  PCI_EXP_DEVCTL2_ARI	0x20	/* Alternative Routing-ID */
+#define  PCI_EXP_IDO_REQ_EN	0x100	/* ID-based ordering request enable */
+#define  PCI_EXP_IDO_CMP_EN	0x200	/* ID-based ordering completion enable */
+#define  PCI_EXP_LTR_EN		0x400	/* Latency tolerance reporting */
+#define  PCI_EXP_OBFF_MSGA_EN	0x2000	/* OBFF enable with Message type A */
+#define  PCI_EXP_OBFF_MSGB_EN	0x4000	/* OBFF enable with Message type B */
+#define  PCI_EXP_OBFF_WAKE_EN	0x6000	/* OBFF using WAKE# signaling */
 #define PCI_EXP_LNKCTL2		48	/* Link Control 2 */
 #define PCI_EXP_SLTCTL2		56	/* Slot Control 2 */
 
@@ -527,6 +537,7 @@
 #define PCI_EXT_CAP_ID_ARI	14
 #define PCI_EXT_CAP_ID_ATS	15
 #define PCI_EXT_CAP_ID_SRIOV	16
+#define PCI_EXT_CAP_ID_LTR	24
 
 /* Advanced Error Reporting */
 #define PCI_ERR_UNCOR_STATUS	4	/* Uncorrectable Error Status */
@@ -683,6 +694,12 @@
 #define  PCI_SRIOV_VFM_MO	0x2	/* Active.MigrateOut */
 #define  PCI_SRIOV_VFM_AV	0x3	/* Active.Available */
 
+#define PCI_LTR_MAX_SNOOP_LAT	0x4
+#define PCI_LTR_MAX_NOSNOOP_LAT	0x6
+#define  PCI_LTR_VALUE_MASK	0x000003ff
+#define  PCI_LTR_SCALE_MASK	0x00001c00
+#define  PCI_LTR_SCALE_SHIFT	10
+
 /* Access Control Service */
 #define PCI_ACS_CAP		0x04	/* ACS Capability Register */
 #define  PCI_ACS_SV		0x01	/* Source Validation */

virt/kvm/assigned-dev.c

@@ -197,7 +197,12 @@ static void kvm_free_assigned_device(struct kvm *kvm,
 {
 	kvm_free_assigned_irq(kvm, assigned_dev);
 
-	__pci_reset_function(assigned_dev->dev);
+	pci_reset_function(assigned_dev->dev);
+	if (pci_load_and_free_saved_state(assigned_dev->dev,
+					  &assigned_dev->pci_saved_state))
+		printk(KERN_INFO "%s: Couldn't reload %s saved state\n",
+		       __func__, dev_name(&assigned_dev->dev->dev));
+	else
 		pci_restore_state(assigned_dev->dev);
 
 	pci_release_regions(assigned_dev->dev);
@@ -516,7 +521,10 @@ static int kvm_vm_ioctl_assign_device(struct kvm *kvm,
 
 	pci_reset_function(dev);
 	pci_save_state(dev);
-
+	match->pci_saved_state = pci_store_saved_state(dev);
+	if (!match->pci_saved_state)
+		printk(KERN_DEBUG "%s: Couldn't store %s saved state\n",
+		       __func__, dev_name(&dev->dev));
 	match->assigned_dev_id = assigned_dev->assigned_dev_id;
 	match->host_segnr = assigned_dev->segnr;
 	match->host_busnr = assigned_dev->busnr;
@@ -546,7 +554,9 @@ static int kvm_vm_ioctl_assign_device(struct kvm *kvm,
 	mutex_unlock(&kvm->lock);
 	return r;
 out_list_del:
-	pci_restore_state(dev);
+	if (pci_load_and_free_saved_state(dev, &match->pci_saved_state))
+		printk(KERN_INFO "%s: Couldn't reload %s saved state\n",
+		       __func__, dev_name(&dev->dev));
 	list_del(&match->list);
 	pci_release_regions(dev);
 out_disable: