Merge tag 'pci-v5.13-fixes-1' of git://git.kernel.org/pub/scm/linux/k…

…ernel/git/helgaas/pci

Pull PCI fixes from Bjorn Helgaas:

 - Fix MSIs for platforms with "msi-map" device-tree property, which we
   broke in v5.13-rc1 (Jean-Philippe Brucker)

 - Add Krzysztof Wilczyński as PCI reviewer (Lorenzo Pieralisi)

* tag 'pci-v5.13-fixes-1' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci:
  PCI/MSI: Fix MSIs for generic hosts that use device-tree's "msi-map"
  MAINTAINERS: Add Krzysztof as PCI host/endpoint controllers reviewer

MAINTAINERS

@@ -14119,6 +14119,7 @@ F:	drivers/pci/controller/pci-v3-semi.c
 PCI ENDPOINT SUBSYSTEM
 M:	Kishon Vijay Abraham I <kishon@ti.com>
 M:	Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
+R:	Krzysztof Wilczyński <kw@linux.com>
 L:	linux-pci@vger.kernel.org
 S:	Supported
 F:	Documentation/PCI/endpoint/*
@@ -14167,6 +14168,7 @@ F:	drivers/pci/controller/pci-xgene-msi.c
 PCI NATIVE HOST BRIDGE AND ENDPOINT DRIVERS
 M:	Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
 R:	Rob Herring <robh@kernel.org>
+R:	Krzysztof Wilczyński <kw@linux.com>
 L:	linux-pci@vger.kernel.org
 S:	Supported
 Q:	http://patchwork.ozlabs.org/project/linux-pci/list/

drivers/pci/of.c

@@ -103,6 +103,13 @@ struct irq_domain *pci_host_bridge_of_msi_domain(struct pci_bus *bus)
 #endif
 }
 
+bool pci_host_of_has_msi_map(struct device *dev)
+{
+	if (dev && dev->of_node)
+		return of_get_property(dev->of_node, "msi-map", NULL);
+	return false;
+}
+
 static inline int __of_pci_pci_compare(struct device_node *node,
 				       unsigned int data)
 {

drivers/pci/probe.c

@@ -925,7 +925,8 @@ static int pci_register_host_bridge(struct pci_host_bridge *bridge)
 	device_enable_async_suspend(bus->bridge);
 	pci_set_bus_of_node(bus);
 	pci_set_bus_msi_domain(bus);
-	if (bridge->msi_domain && !dev_get_msi_domain(&bus->dev))
+	if (bridge->msi_domain && !dev_get_msi_domain(&bus->dev) &&
+	    !pci_host_of_has_msi_map(parent))
 		bus->bus_flags |= PCI_BUS_FLAGS_NO_MSI;
 
 	if (!parent)

include/linux/pci.h

@@ -2344,13 +2344,15 @@ int pci_vpd_find_info_keyword(const u8 *buf, unsigned int off,
 struct device_node;
 struct irq_domain;
 struct irq_domain *pci_host_bridge_of_msi_domain(struct pci_bus *bus);
+bool pci_host_of_has_msi_map(struct device *dev);
 
 /* Arch may override this (weak) */
 struct device_node *pcibios_get_phb_of_node(struct pci_bus *bus);
 
 #else	/* CONFIG_OF */
 static inline struct irq_domain *
 pci_host_bridge_of_msi_domain(struct pci_bus *bus) { return NULL; }
+static inline bool pci_host_of_has_msi_map(struct device *dev) { return false; }
 #endif  /* CONFIG_OF */
 
 static inline struct device_node *