From: Jake Oshins <ja...@microsoft.com>

This patch adds an fwnode_handle to struct pci_sysdata, which is
used by the next patch in the series when trying to locate an
IRQ domain associated with a root PCI bus.

Signed-off-by: Jake Oshins <ja...@microsoft.com>
---
 arch/x86/include/asm/pci.h | 15 +++++++++++++++
 drivers/pci/probe.c        |  1 +
 include/linux/pci.h        |  4 ++++
 3 files changed, 20 insertions(+)

diff --git a/arch/x86/include/asm/pci.h b/arch/x86/include/asm/pci.h
index 4625943..6fc3c7c 100644
--- a/arch/x86/include/asm/pci.h
+++ b/arch/x86/include/asm/pci.h
@@ -20,6 +20,9 @@ struct pci_sysdata {
 #ifdef CONFIG_X86_64
        void            *iommu;         /* IOMMU private data */
 #endif
+#ifdef CONFIG_PCI_MSI_IRQ_DOMAIN
+       void            *fwnode;        /* IRQ domain for MSI assignment */
+#endif
 };
 
 extern int pci_routeirq;
@@ -32,6 +35,7 @@ extern int noioapicreroute;
 static inline int pci_domain_nr(struct pci_bus *bus)
 {
        struct pci_sysdata *sd = bus->sysdata;
+
        return sd->domain;
 }
 
@@ -41,6 +45,17 @@ static inline int pci_proc_domain(struct pci_bus *bus)
 }
 #endif
 
+#ifdef CONFIG_PCI_MSI_IRQ_DOMAIN
+static inline void *_pci_root_bus_fwnode(struct pci_bus *bus)
+{
+       struct pci_sysdata *sd = bus->sysdata;
+
+       return sd->fwnode;
+}
+
+#define pci_root_bus_fwnode    _pci_root_bus_fwnode
+#endif
+
 /* Can be used to override the logic in pci_scan_bus for skipping
    already-configured bus numbers - to be used for buggy BIOSes
    or architectures with incomplete PCI setup by the loader */
diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c
index edb1984..750f907 100644
--- a/drivers/pci/probe.c
+++ b/drivers/pci/probe.c
@@ -15,6 +15,7 @@
 #include <linux/pci-aspm.h>
 #include <linux/aer.h>
 #include <linux/acpi.h>
+#include <linux/irqdomain.h>
 #include <asm-generic/pci-bridge.h>
 #include "pci.h"
 
diff --git a/include/linux/pci.h b/include/linux/pci.h
index 6ae25aa..b414422 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -1517,6 +1517,10 @@ static inline int pci_get_new_domain_nr(void) { return 
-ENOSYS; }
 
 #include <asm/pci.h>
 
+#ifndef pci_root_bus_fwnode
+#define pci_root_bus_fwnode(bus)       ((void)(bus), NULL)
+#endif
+
 /* these helpers provide future and backwards compatibility
  * for accessing popular PCI BAR info */
 #define pci_resource_start(dev, bar)   ((dev)->resource[(bar)].start)
-- 
1.9.1

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