Merge branch 'irq-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull irq updates from Thomas Gleixner:
 "This updated pull request does not contain the last few GIC related
  patches which were reported to cause a regression.  There is a fix
  available, but I let it breed for a couple of days first.

  The irq departement provides:

   - new infrastructure to support non PCI based MSI interrupts
   - a couple of new irq chip drivers
   - the usual pile of fixlets and updates to irq chip drivers
   - preparatory changes for removal of the irq argument from interrupt
     flow handlers
   - preparatory changes to remove IRQF_VALID"

* 'irq-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (129 commits)
  irqchip/imx-gpcv2: IMX GPCv2 driver for wakeup sources
  irqchip: Add bcm2836 interrupt controller for Raspberry Pi 2
  irqchip: Add documentation for the bcm2836 interrupt controller
  irqchip/bcm2835: Add support for being used as a second level controller
  irqchip/bcm2835: Refactor handle_IRQ() calls out of MAKE_HWIRQ
  PCI: xilinx: Fix typo in function name
  irqchip/gic: Ensure gic_cpu_if_up/down() programs correct GIC instance
  irqchip/gic: Only allow the primary GIC to set the CPU map
  PCI/MSI: pci-xgene-msi: Consolidate chained IRQ handler install/remove
  unicore32/irq: Prepare puv3_gpio_handler for irq argument removal
  tile/pci_gx: Prepare trio_handle_level_irq for irq argument removal
  m68k/irq: Prepare irq handlers for irq argument removal
  C6X/megamode-pic: Prepare megamod_irq_cascade for irq argument removal
  blackfin: Prepare irq handlers for irq argument removal
  arc/irq: Prepare idu_cascade_isr for irq argument removal
  sparc/irq: Use access helper irq_data_get_affinity_mask()
  sparc/irq: Use helper irq_data_get_irq_handler_data()
  parisc/irq: Use access helper irq_data_get_affinity_mask()
  mn10300/irq: Use access helper irq_data_get_affinity_mask()
  irqchip/i8259: Prepare i8259_irq_dispatch for irq argument removal
  ...

1 files changed, 45 insertions, 0 deletions

diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c
index 04cfc60f7860..8177f3b04491 100644
--- a/drivers/pci/probe.c
+++ b/drivers/pci/probe.c
@@ -661,6 +661,35 @@ static void pci_set_bus_speed(struct pci_bus *bus)
 	}
 }
 
+static struct irq_domain *pci_host_bridge_msi_domain(struct pci_bus *bus)
+{
+	struct irq_domain *d;
+
+	/*
+	 * Any firmware interface that can resolve the msi_domain
+	 * should be called from here.
+	 */
+	d = pci_host_bridge_of_msi_domain(bus);
+
+	return d;
+}
+
+static void pci_set_bus_msi_domain(struct pci_bus *bus)
+{
+	struct irq_domain *d;
+
+	/*
+	 * Either bus is the root, and we must obtain it from the
+	 * firmware, or we inherit it from the bridge device.
+	 */
+	if (pci_is_root_bus(bus))
+		d = pci_host_bridge_msi_domain(bus);
+	else
+		d = dev_get_msi_domain(&bus->self->dev);
+
+	dev_set_msi_domain(&bus->dev, d);
+}
+
 static struct pci_bus *pci_alloc_child_bus(struct pci_bus *parent,
 					   struct pci_dev *bridge, int busnr)
 {
@@ -714,6 +743,7 @@ static struct pci_bus *pci_alloc_child_bus(struct pci_bus *parent,
 	bridge->subordinate = child;
 
 add_dev:
+	pci_set_bus_msi_domain(child);
 	ret = device_register(&child->dev);
 	WARN_ON(ret < 0);
 
@@ -1594,6 +1624,17 @@ static void pci_init_capabilities(struct pci_dev *dev)
 	pci_enable_acs(dev);
 }
 
+static void pci_set_msi_domain(struct pci_dev *dev)
+{
+	/*
+	 * If no domain has been set through the pcibios_add_device
+	 * callback, inherit the default from the bus device.
+	 */
+	if (!dev_get_msi_domain(&dev->dev))
+		dev_set_msi_domain(&dev->dev,
+				   dev_get_msi_domain(&dev->bus->dev));
+}
+
 void pci_device_add(struct pci_dev *dev, struct pci_bus *bus)
 {
 	int ret;
@@ -1635,6 +1676,9 @@ void pci_device_add(struct pci_dev *dev, struct pci_bus *bus)
 	ret = pcibios_add_device(dev);
 	WARN_ON(ret < 0);
 
+	/* Setup MSI irq domain */
+	pci_set_msi_domain(dev);
+
 	/* Notifier could use PCI capabilities */
 	dev->match_driver = false;
 	ret = device_add(&dev->dev);
@@ -2008,6 +2052,7 @@ struct pci_bus *pci_create_root_bus(struct device *parent, int bus,
 	b->bridge = get_device(&bridge->dev);
 	device_enable_async_suspend(b->bridge);
 	pci_set_bus_of_node(b);
+	pci_set_bus_msi_domain(b);
 
 	if (!parent)
 		set_dev_node(b->bridge, pcibus_to_node(b));