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Subject[PATCH V2 2/4] PCI: Add pcibios_add_device
Date
Platforms may want to provide architecture-specific functionality during
PCI enumeration. Add a pcibios_add_device() call that architectures can
override to do so.

Signed-off-by: Matthew Garrett <mjg@redhat.com>
Tested-by: Seth Forshee <seth.forshee@canonical.com>
---
drivers/pci/bus.c | 5 +++++
drivers/pci/pci.c | 13 +++++++++++++
include/linux/pci.h | 1 +
3 files changed, 19 insertions(+)
diff --git a/drivers/pci/bus.c b/drivers/pci/bus.c
index 4b0970b..e2f447e 100644
--- a/drivers/pci/bus.c
+++ b/drivers/pci/bus.c
@@ -166,6 +166,11 @@ int pci_bus_add_device(struct pci_dev *dev)
int retval;

pci_fixup_device(pci_fixup_final, dev);
+
+ retval = pcibios_add_device(dev);
+ if (retval)
+ return retval;
+
retval = device_add(&dev->dev);
if (retval)
return retval;
diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c
index f3ea977..fec3a92 100644
--- a/drivers/pci/pci.c
+++ b/drivers/pci/pci.c
@@ -1385,6 +1385,19 @@ void pcim_pin_device(struct pci_dev *pdev)
dr->pinned = 1;
}

+/*
+ * pcibios_add_device - provide arch specific hooks when adding device dev
+ * @dev: the PCI device being added
+ *
+ * Permits the platform to provide architecture specific functionality when
+ * devices are added. This is the default implementation. Architecture
+ * implementations can override this.
+ */
+int __weak pcibios_add_device(struct pci_dev *dev)
+{
+ return 0;
+}
+
/**
* pcibios_disable_device - disable arch specific PCI resources for device dev
* @dev: the PCI device to disable
diff --git a/include/linux/pci.h b/include/linux/pci.h
index 5faa831..6a2625c 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -1582,6 +1582,7 @@ void pcibios_disable_device(struct pci_dev *dev);
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);

#ifdef CONFIG_PCI_MMCONFIG
extern void __init pci_mmcfg_early_init(void);
--
1.7.10.4


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