PCI: Add pcibios_release_device()

Platforms may want to provide architecture-specific functionality when
a PCI device is released.  Add a pcibios_release_device() call that
architectures can override to do so.

Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>

3 files changed, 12 insertions, 0 deletions

diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c
index e5f4e55d407d..709791b70ca0 100644
--- a/drivers/pci/pci.c
+++ b/drivers/pci/pci.c
@@ -1335,6 +1335,16 @@ int __weak pcibios_add_device (struct pci_dev *dev)
 }
 
 /**
+ * pcibios_release_device - provide arch specific hooks when releasing device dev
+ * @dev: the PCI device being released
+ *
+ * Permits the platform to provide architecture specific functionality when
+ * devices are released. This is the default implementation. Architecture
+ * implementations can override this.
+ */
+void __weak pcibios_release_device(struct pci_dev *dev) {}
+
+/**
  * pcibios_disable_device - disable arch specific PCI resources for device dev
  * @dev: the PCI device to disable
  *
diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c
index 70f10fa3c1b2..58cc0a8a0979 100644
--- a/drivers/pci/probe.c
+++ b/drivers/pci/probe.c
@@ -1132,6 +1132,7 @@ static void pci_release_dev(struct device *dev)
         pci_dev = to_pci_dev(dev);
         pci_release_capabilities(pci_dev);
         pci_release_of_node(pci_dev);
+        pcibios_release_device(pci_dev);
         kfree(pci_dev);
 }
 
diff --git a/include/linux/pci.h b/include/linux/pci.h
index 3a24e4ff3248..8f170e9073a5 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -1643,6 +1643,7 @@ void pcibios_set_master(struct pci_dev *dev);
 int pcibios_set_pcie_reset_state(struct pci_dev *dev,
                                  enum pcie_reset_state state);
 int pcibios_add_device(struct pci_dev *dev);
+void pcibios_release_device(struct pci_dev *dev);
 
 #ifdef CONFIG_PCI_MMCONFIG
 void __init pci_mmcfg_early_init(void);