Merge branch 'pci/enumeration'

- Remove x86 and arm64 node-local allocation for host bridge structures
    (Punit Agrawal)

  - Pay attention to device-specific _PXM node values (Jonathan Cameron)

  - Support new Immediate Readiness bit (Felipe Balbi)

* pci/enumeration:
  PCI: Add support for Immediate Readiness
  ACPI/PCI: Pay attention to device-specific _PXM node values
  x86/PCI: Remove node-local allocation when initialising host controller
  arm64: PCI: Remove node-local allocations when initialising host controller

arch/arm64/kernel/pci.c

@@ -165,16 +165,15 @@ static void pci_acpi_generic_release_info(struct acpi_pci_root_info *ci)
 /* Interface called from ACPI code to setup PCI host controller */
 struct pci_bus *pci_acpi_scan_root(struct acpi_pci_root *root)
 {
-	int node = acpi_get_node(root->device->handle);
 	struct acpi_pci_generic_root_info *ri;
 	struct pci_bus *bus, *child;
 	struct acpi_pci_root_ops *root_ops;
 
-	ri = kzalloc_node(sizeof(*ri), GFP_KERNEL, node);
+	ri = kzalloc(sizeof(*ri), GFP_KERNEL);
 	if (!ri)
 		return NULL;
 
-	root_ops = kzalloc_node(sizeof(*root_ops), GFP_KERNEL, node);
+	root_ops = kzalloc(sizeof(*root_ops), GFP_KERNEL);
 	if (!root_ops) {
 		kfree(ri);
 		return NULL;

arch/x86/pci/acpi.c

@@ -356,7 +356,7 @@ struct pci_bus *pci_acpi_scan_root(struct acpi_pci_root *root)
 	} else {
 		struct pci_root_info *info;
 
-		info = kzalloc_node(sizeof(*info), GFP_KERNEL, node);
+		info = kzalloc(sizeof(*info), GFP_KERNEL);
 		if (!info)
 			dev_err(&root->device->dev,
 				"pci_bus %04x:%02x: ignored (out of memory)\n",

drivers/pci/pci-acpi.c

@@ -751,10 +751,15 @@ static void pci_acpi_setup(struct device *dev)
 {
 	struct pci_dev *pci_dev = to_pci_dev(dev);
 	struct acpi_device *adev = ACPI_COMPANION(dev);
+	int node;
 
 	if (!adev)
 		return;
 
+	node = acpi_get_node(adev->handle);
+	if (node != NUMA_NO_NODE)
+		set_dev_node(dev, node);
+
 	pci_acpi_optimize_delay(pci_dev, adev->handle);
 
 	pci_acpi_add_pm_notifier(adev, pci_dev);

drivers/pci/pci.c

@@ -999,7 +999,7 @@ static void __pci_start_power_transition(struct pci_dev *dev, pci_power_t state)
 		 * because have already delayed for the bridge.
 		 */
 		if (dev->runtime_d3cold) {
-			if (dev->d3cold_delay)
+			if (dev->d3cold_delay && !dev->imm_ready)
 				msleep(dev->d3cold_delay);
 			/*
 			 * When powering on a bridge from D3cold, the
@@ -2644,6 +2644,7 @@ EXPORT_SYMBOL_GPL(pci_d3cold_disable);
 void pci_pm_init(struct pci_dev *dev)
 {
 	int pm;
+	u16 status;
 	u16 pmc;
 
 	pm_runtime_forbid(&dev->dev);
@@ -2706,6 +2707,10 @@ void pci_pm_init(struct pci_dev *dev)
 		/* Disable the PME# generation functionality */
 		pci_pme_active(dev, false);
 	}
+
+	pci_read_config_word(dev, PCI_STATUS, &status);
+	if (status & PCI_STATUS_IMM_READY)
+		dev->imm_ready = 1;
 }
 
 static unsigned long pci_ea_flags(struct pci_dev *dev, u8 prop)
@@ -4376,6 +4381,9 @@ int pcie_flr(struct pci_dev *dev)
 
 	pcie_capability_set_word(dev, PCI_EXP_DEVCTL, PCI_EXP_DEVCTL_BCR_FLR);
 
+	if (dev->imm_ready)
+		return 0;
+
 	/*
 	 * Per PCIe r4.0, sec 6.6.2, a device must complete an FLR within
 	 * 100ms, but may silently discard requests while the FLR is in
@@ -4417,6 +4425,9 @@ static int pci_af_flr(struct pci_dev *dev, int probe)
 
 	pci_write_config_byte(dev, pos + PCI_AF_CTRL, PCI_AF_CTRL_FLR);
 
+	if (dev->imm_ready)
+		return 0;
+
 	/*
 	 * Per Advanced Capabilities for Conventional PCI ECN, 13 April 2006,
 	 * updated 27 July 2006; a device must complete an FLR within

include/linux/pci.h

@@ -325,6 +325,7 @@ struct pci_dev {
 	pci_power_t	current_state;	/* Current operating state. In ACPI,
 					   this is D0-D3, D0 being fully
 					   functional, and D3 being off. */
+	unsigned int	imm_ready:1;	/* Supports Immediate Readiness */
 	u8		pm_cap;		/* PM capability offset */
 	unsigned int	pme_support:5;	/* Bitmask of states from which PME#
 					   can be generated */

include/uapi/linux/pci_regs.h

@@ -52,6 +52,7 @@
 #define  PCI_COMMAND_INTX_DISABLE 0x400 /* INTx Emulation Disable */
 
 #define PCI_STATUS		0x06	/* 16 bits */
+#define  PCI_STATUS_IMM_READY	0x01	/* Immediate Readiness */
 #define  PCI_STATUS_INTERRUPT	0x08	/* Interrupt status */
 #define  PCI_STATUS_CAP_LIST	0x10	/* Support Capability List */
 #define  PCI_STATUS_66MHZ	0x20	/* Support 66 MHz PCI 2.1 bus */