PCI: Export pcie_find_root_port

commit e784930bd645e7df78c66e7872fec282b0620075 upstream.

Export pcie_find_root_port() so we can use it outside of PCIe-AER error
injection.

Signed-off-by: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/pci/pcie/aer/aer_inject.c b/drivers/pci/pcie/aer/aer_inject.c
index 182224acedbe79c18dbc357cb45763afef40e387..58f1419a68aef0b7fd1e7eef352400a875f7ad94 100644 (file)
--- a/drivers/pci/pcie/aer/aer_inject.c
+++ b/drivers/pci/pcie/aer/aer_inject.c
@@ -283,20 +283,6 @@ out:
        return 0;
 }
 
-static struct pci_dev *pcie_find_root_port(struct pci_dev *dev)
-{
-       while (1) {
-               if (!pci_is_pcie(dev))
-                       break;
-               if (pci_pcie_type(dev) == PCI_EXP_TYPE_ROOT_PORT)
-                       return dev;
-               if (!dev->bus->self)
-                       break;
-               dev = dev->bus->self;
-       }
-       return NULL;
-}
-
 static int find_aer_device_iter(struct device *device, void *data)
 {
        struct pcie_device **result = data;

diff --git a/include/linux/pci.h b/include/linux/pci.h
index e89c7ee7e8036b55abd63a687fbd91e858006554..5f37614f2451faa1fdcfdf91031963746cea2c83 100644 (file)
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -1802,6 +1802,20 @@ static inline int pci_pcie_type(const struct pci_dev *dev)
        return (pcie_caps_reg(dev) & PCI_EXP_FLAGS_TYPE) >> 4;
 }
 
+static inline struct pci_dev *pcie_find_root_port(struct pci_dev *dev)
+{
+       while (1) {
+               if (!pci_is_pcie(dev))
+                       break;
+               if (pci_pcie_type(dev) == PCI_EXP_TYPE_ROOT_PORT)
+                       return dev;
+               if (!dev->bus->self)
+                       break;
+               dev = dev->bus->self;
+       }
+       return NULL;
+}
+
 void pci_request_acs(void);
 bool pci_acs_enabled(struct pci_dev *pdev, u16 acs_flags);
 bool pci_acs_path_enabled(struct pci_dev *start,