[PATCH 1/2] PCI: Introduce pcibios_fixup_dev()

[Shawn Anastasio]

Introduce pcibios_fixup_dev to allow platform-specific code to perform
final setup of a PCI device after it has been registered in sysfs.

The default implementation is a no-op.

Signed-off-by: Shawn Anastasio <shawn at anastas.io>
---
 drivers/pci/probe.c | 14 ++++++++++++++
 include/linux/pci.h |  1 +
 2 files changed, 15 insertions(+)

diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c
index a3c7338fad86..14eb7ee38794 100644
--- a/drivers/pci/probe.c
+++ b/drivers/pci/probe.c
@@ -2652,6 +2652,17 @@ static void pci_set_msi_domain(struct pci_dev *dev)
 	dev_set_msi_domain(&dev->dev, d);
 }
 
+/**
+ * pcibios_fixup_dev - Platform-specific device setup
+ * @dev: Device to set up
+ *
+ * Default empty implementation. Replace with an architecture-specific
+ * setup routine, if necessary.
+ */
+void __weak pcibios_fixup_dev(struct pci_dev *dev)
+{
+}
+
 void pci_device_add(struct pci_dev *dev, struct pci_bus *bus)
 {
 	int ret;
@@ -2699,6 +2710,9 @@ void pci_device_add(struct pci_dev *dev, struct pci_bus *bus)
 	dev->match_driver = false;
 	ret = device_add(&dev->dev);
 	WARN_ON(ret < 0);
+
+	/* Allow platform-specific code to perform final setup of device */
+	pcibios_fixup_dev(dev);
 }
 
 struct pci_dev *pci_scan_single_device(struct pci_bus *bus, int devfn)
diff --git a/include/linux/pci.h b/include/linux/pci.h
index 82e4cd1b7ac3..83eb0e241137 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -960,6 +960,7 @@ void pcibios_bus_add_device(struct pci_dev *pdev);
 void pcibios_add_bus(struct pci_bus *bus);
 void pcibios_remove_bus(struct pci_bus *bus);
 void pcibios_fixup_bus(struct pci_bus *);
+void pcibios_fixup_dev(struct pci_dev *);
 int __must_check pcibios_enable_device(struct pci_dev *, int mask);
 /* Architecture-specific versions may override this (weak) */
 char *pcibios_setup(char *str);
-- 
2.20.1