7 files changed, 84 insertions, 26 deletions

diff --git a/drivers/pci/host/pci-mvebu.c b/drivers/pci/host/pci-mvebu.c
index c269e430c76..2aa7b77c7c8 100644
--- a/drivers/pci/host/pci-mvebu.c
+++ b/drivers/pci/host/pci-mvebu.c
@@ -447,6 +447,11 @@ static int mvebu_sw_pci_bridge_read(struct mvebu_pcie_port *port,
 		*value = 0;
 		break;
 
+	case PCI_INTERRUPT_LINE:
+		/* LINE PIN MIN_GNT MAX_LAT */
+		*value = 0;
+		break;
+
 	default:
 		*value = 0xffffffff;
 		return PCIBIOS_BAD_REGISTER_NUMBER;
diff --git a/drivers/pci/hotplug/acpiphp_glue.c b/drivers/pci/hotplug/acpiphp_glue.c
index 1cf605f6767..e86439283a5 100644
--- a/drivers/pci/hotplug/acpiphp_glue.c
+++ b/drivers/pci/hotplug/acpiphp_glue.c
@@ -279,7 +279,9 @@ static acpi_status register_slot(acpi_handle handle, u32 lvl, void *data,
 
 	status = acpi_evaluate_integer(handle, "_ADR", NULL, &adr);
 	if (ACPI_FAILURE(status)) {
-		acpi_handle_warn(handle, "can't evaluate _ADR (%#x)\n", status);
+		if (status != AE_NOT_FOUND)
+			acpi_handle_warn(handle,
+				"can't evaluate _ADR (%#x)\n", status);
 		return AE_OK;
 	}
 
@@ -643,6 +645,24 @@ static void disable_slot(struct acpiphp_slot *slot)
 	slot->flags &= (~SLOT_ENABLED);
 }
 
+static bool acpiphp_no_hotplug(acpi_handle handle)
+{
+	struct acpi_device *adev = NULL;
+
+	acpi_bus_get_device(handle, &adev);
+	return adev && adev->flags.no_hotplug;
+}
+
+static bool slot_no_hotplug(struct acpiphp_slot *slot)
+{
+	struct acpiphp_func *func;
+
+	list_for_each_entry(func, &slot->funcs, sibling)
+		if (acpiphp_no_hotplug(func_to_handle(func)))
+			return true;
+
+	return false;
+}
 
 /**
  * get_slot_status - get ACPI slot status
@@ -701,7 +721,8 @@ static void trim_stale_devices(struct pci_dev *dev)
 		unsigned long long sta;
 
 		status = acpi_evaluate_integer(handle, "_STA", NULL, &sta);
-		alive = ACPI_SUCCESS(status) && sta == ACPI_STA_ALL;
+		alive = (ACPI_SUCCESS(status) && sta == ACPI_STA_ALL)
+			|| acpiphp_no_hotplug(handle);
 	}
 	if (!alive) {
 		u32 v;
@@ -741,8 +762,9 @@ static void acpiphp_check_bridge(struct acpiphp_bridge *bridge)
 		struct pci_dev *dev, *tmp;
 
 		mutex_lock(&slot->crit_sect);
-		/* wake up all functions */
-		if (get_slot_status(slot) == ACPI_STA_ALL) {
+		if (slot_no_hotplug(slot)) {
+			; /* do nothing */
+		} else if (get_slot_status(slot) == ACPI_STA_ALL) {
 			/* remove stale devices if any */
 			list_for_each_entry_safe(dev, tmp, &bus->devices,
 						 bus_list)
diff --git a/drivers/pci/pci-acpi.c b/drivers/pci/pci-acpi.c
index 43e31799132..68128d6bd33 100644
--- a/drivers/pci/pci-acpi.c
+++ b/drivers/pci/pci-acpi.c
@@ -327,29 +327,32 @@ static int acpi_pci_find_device(struct device *dev, acpi_handle *handle)
 static void pci_acpi_setup(struct device *dev)
 {
 	struct pci_dev *pci_dev = to_pci_dev(dev);
-	acpi_handle handle = ACPI_HANDLE(dev);
-	struct acpi_device *adev;
+	struct acpi_device *adev = ACPI_COMPANION(dev);
 
-	if (acpi_bus_get_device(handle, &adev) || !adev->wakeup.flags.valid)
+	if (!adev)
+		return;
+
+	pci_acpi_add_pm_notifier(adev, pci_dev);
+	if (!adev->wakeup.flags.valid)
 		return;
 
 	device_set_wakeup_capable(dev, true);
 	acpi_pci_sleep_wake(pci_dev, false);
-
-	pci_acpi_add_pm_notifier(adev, pci_dev);
 	if (adev->wakeup.flags.run_wake)
 		device_set_run_wake(dev, true);
 }
 
 static void pci_acpi_cleanup(struct device *dev)
 {
-	acpi_handle handle = ACPI_HANDLE(dev);
-	struct acpi_device *adev;
+	struct acpi_device *adev = ACPI_COMPANION(dev);
+
+	if (!adev)
+		return;
 
-	if (!acpi_bus_get_device(handle, &adev) && adev->wakeup.flags.valid) {
+	pci_acpi_remove_pm_notifier(adev);
+	if (adev->wakeup.flags.valid) {
 		device_set_wakeup_capable(dev, false);
 		device_set_run_wake(dev, false);
-		pci_acpi_remove_pm_notifier(adev);
 	}
 }
 
diff --git a/drivers/pci/pci-driver.c b/drivers/pci/pci-driver.c
index 9042fdbd724..25f0bc65916 100644
--- a/drivers/pci/pci-driver.c
+++ b/drivers/pci/pci-driver.c
@@ -19,6 +19,7 @@
 #include <linux/cpu.h>
 #include <linux/pm_runtime.h>
 #include <linux/suspend.h>
+#include <linux/kexec.h>
 #include "pci.h"
 
 struct pci_dynid {
@@ -288,12 +289,27 @@ static int pci_call_probe(struct pci_driver *drv, struct pci_dev *dev,
 	int error, node;
 	struct drv_dev_and_id ddi = { drv, dev, id };
 
-	/* Execute driver initialization on node where the device's
-	   bus is attached to.  This way the driver likely allocates
-	   its local memory on the right node without any need to
-	   change it. */
+	/*
+	 * Execute driver initialization on node where the device is
+	 * attached.  This way the driver likely allocates its local memory
+	 * on the right node.
+	 */
 	node = dev_to_node(&dev->dev);
-	if (node >= 0) {
+
+	/*
+	 * On NUMA systems, we are likely to call a PF probe function using
+	 * work_on_cpu().  If that probe calls pci_enable_sriov() (which
+	 * adds the VF devices via pci_bus_add_device()), we may re-enter
+	 * this function to call the VF probe function.  Calling
+	 * work_on_cpu() again will cause a lockdep warning.  Since VFs are
+	 * always on the same node as the PF, we can work around this by
+	 * avoiding work_on_cpu() when we're already on the correct node.
+	 *
+	 * Preemption is enabled, so it's theoretically unsafe to use
+	 * numa_node_id(), but even if we run the probe function on the
+	 * wrong node, it should be functionally correct.
+	 */
+	if (node >= 0 && node != numa_node_id()) {
 		int cpu;
 
 		get_online_cpus();
@@ -305,6 +321,7 @@ static int pci_call_probe(struct pci_driver *drv, struct pci_dev *dev,
 		put_online_cpus();
 	} else
 		error = local_pci_probe(&ddi);
+
 	return error;
 }
 
@@ -399,12 +416,17 @@ static void pci_device_shutdown(struct device *dev)
 	pci_msi_shutdown(pci_dev);
 	pci_msix_shutdown(pci_dev);
 
+#ifdef CONFIG_KEXEC
 	/*
-	 * Turn off Bus Master bit on the device to tell it to not
-	 * continue to do DMA. Don't touch devices in D3cold or unknown states.
+	 * If this is a kexec reboot, turn off Bus Master bit on the
+	 * device to tell it to not continue to do DMA. Don't touch
+	 * devices in D3cold or unknown states.
+	 * If it is not a kexec reboot, firmware will hit the PCI
+	 * devices with big hammer and stop their DMA any way.
 	 */
-	if (pci_dev->current_state <= PCI_D3hot)
+	if (kexec_in_progress && (pci_dev->current_state <= PCI_D3hot))
 		pci_clear_master(pci_dev);
+#endif
 }
 
 #ifdef CONFIG_PM
diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c
index 33120d15666..07369f32e8b 100644
--- a/drivers/pci/pci.c
+++ b/drivers/pci/pci.c
@@ -4165,6 +4165,14 @@ int pci_set_vga_state(struct pci_dev *dev, bool decode,
 	return 0;
 }
 
+bool pci_device_is_present(struct pci_dev *pdev)
+{
+	u32 v;
+
+	return pci_bus_read_dev_vendor_id(pdev->bus, pdev->devfn, &v, 0);
+}
+EXPORT_SYMBOL_GPL(pci_device_is_present);
+
 #define RESOURCE_ALIGNMENT_PARAM_SIZE COMMAND_LINE_SIZE
 static char resource_alignment_param[RESOURCE_ALIGNMENT_PARAM_SIZE] = {0};
 static DEFINE_SPINLOCK(resource_alignment_lock);
diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c
index b3b1b9aa886..3a02717473a 100644
--- a/drivers/pci/quirks.c
+++ b/drivers/pci/quirks.c
@@ -9,10 +9,6 @@
  *
  *  Init/reset quirks for USB host controllers should be in the
  *  USB quirks file, where their drivers can access reuse it.
- *
- *  The bridge optimization stuff has been removed. If you really
- *  have a silly BIOS which is unable to set your host bridge right,
- *  use the PowerTweak utility (see http://powertweak.sourceforge.net).
  */
 
 #include <linux/types.h>
diff --git a/drivers/pci/remove.c b/drivers/pci/remove.c
index 1576851028d..cc9337a7152 100644
--- a/drivers/pci/remove.c
+++ b/drivers/pci/remove.c
@@ -24,7 +24,7 @@ static void pci_stop_dev(struct pci_dev *dev)
 	if (dev->is_added) {
 		pci_proc_detach_device(dev);
 		pci_remove_sysfs_dev_files(dev);
-		device_del(&dev->dev);
+		device_release_driver(&dev->dev);
 		dev->is_added = 0;
 	}
 
@@ -34,6 +34,8 @@ static void pci_stop_dev(struct pci_dev *dev)
 
 static void pci_destroy_dev(struct pci_dev *dev)
 {
+	device_del(&dev->dev);
+
 	down_write(&pci_bus_sem);
 	list_del(&dev->bus_list);
 	up_write(&pci_bus_sem);