1 files changed, 59 insertions, 2 deletions

diff --git a/drivers/pci/access.c b/drivers/pci/access.c
index 8b7382705bf2..74cf5fffb1e1 100644
--- a/drivers/pci/access.c
+++ b/drivers/pci/access.c
@@ -629,7 +629,7 @@ void pci_vpd_release(struct pci_dev *dev)
  *
  * When access is locked, any userspace reads or writes to config
  * space and concurrent lock requests will sleep until access is
- * allowed via pci_cfg_access_unlocked again.
+ * allowed via pci_cfg_access_unlock() again.
  */
 void pci_cfg_access_lock(struct pci_dev *dev)
 {
@@ -700,7 +700,8 @@ static bool pcie_downstream_port(const struct pci_dev *dev)
         int type = pci_pcie_type(dev);
 
         return type == PCI_EXP_TYPE_ROOT_PORT ||
-               type == PCI_EXP_TYPE_DOWNSTREAM;
+               type == PCI_EXP_TYPE_DOWNSTREAM ||
+               type == PCI_EXP_TYPE_PCIE_BRIDGE;
 }
 
 bool pcie_cap_has_lnkctl(const struct pci_dev *dev)
@@ -890,3 +891,59 @@ int pcie_capability_clear_and_set_dword(struct pci_dev *dev, int pos,
         return ret;
 }
 EXPORT_SYMBOL(pcie_capability_clear_and_set_dword);
+
+int pci_read_config_byte(const struct pci_dev *dev, int where, u8 *val)
+{
+        if (pci_dev_is_disconnected(dev)) {
+                *val = ~0;
+                return -ENODEV;
+        }
+        return pci_bus_read_config_byte(dev->bus, dev->devfn, where, val);
+}
+EXPORT_SYMBOL(pci_read_config_byte);
+
+int pci_read_config_word(const struct pci_dev *dev, int where, u16 *val)
+{
+        if (pci_dev_is_disconnected(dev)) {
+                *val = ~0;
+                return -ENODEV;
+        }
+        return pci_bus_read_config_word(dev->bus, dev->devfn, where, val);
+}
+EXPORT_SYMBOL(pci_read_config_word);
+
+int pci_read_config_dword(const struct pci_dev *dev, int where,
+                                        u32 *val)
+{
+        if (pci_dev_is_disconnected(dev)) {
+                *val = ~0;
+                return -ENODEV;
+        }
+        return pci_bus_read_config_dword(dev->bus, dev->devfn, where, val);
+}
+EXPORT_SYMBOL(pci_read_config_dword);
+
+int pci_write_config_byte(const struct pci_dev *dev, int where, u8 val)
+{
+        if (pci_dev_is_disconnected(dev))
+                return -ENODEV;
+        return pci_bus_write_config_byte(dev->bus, dev->devfn, where, val);
+}
+EXPORT_SYMBOL(pci_write_config_byte);
+
+int pci_write_config_word(const struct pci_dev *dev, int where, u16 val)
+{
+        if (pci_dev_is_disconnected(dev))
+                return -ENODEV;
+        return pci_bus_write_config_word(dev->bus, dev->devfn, where, val);
+}
+EXPORT_SYMBOL(pci_write_config_word);
+
+int pci_write_config_dword(const struct pci_dev *dev, int where,
+                                         u32 val)
+{
+        if (pci_dev_is_disconnected(dev))
+                return -ENODEV;
+        return pci_bus_write_config_dword(dev->bus, dev->devfn, where, val);
+}
+EXPORT_SYMBOL(pci_write_config_dword);