From: Thierry Reding <treding@xxxxxxxxxx>
This callback will be called on every newly created bus. Drivers can
implement it to perform driver-specific initialization of the bus.
Signed-off-by: Thierry Reding <treding@xxxxxxxxxx>
---
drivers/pci/probe.c | 8 +++++++-
include/linux/pci.h | 1 +
2 files changed, 8 insertions(+), 1 deletion(-)
diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c
index e735c728e3b3..fbed432f8915 100644
--- a/drivers/pci/probe.c
+++ b/drivers/pci/probe.c
@@ -754,7 +754,13 @@ add_dev:
ret = device_register(&child->dev);
WARN_ON(ret < 0);
- pcibios_add_bus(child);
+ if (child->ops->add_bus) {
+ ret = child->ops->add_bus(child);
+ if (ret < 0)
+ dev_err(&child->dev, "failed to add bus: %d\n", ret);
+ } else {
+ pcibios_add_bus(child);
+ }
/* Create legacy_io and legacy_mem files for this bus */
pci_create_legacy_files(child);
diff --git a/include/linux/pci.h b/include/linux/pci.h
index e828e7b4afec..70c1228d585f 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -569,6 +569,7 @@ static inline int pcibios_err_to_errno(int err)
/* Low-level architecture-dependent routines */
struct pci_ops {
+ int (*add_bus)(struct pci_bus *bus);
void __iomem *(*map_bus)(struct pci_bus *bus, unsigned int devfn, int where);
int (*read)(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 *val);
int (*write)(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 val);
--
2.5.0
--
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