[PATCH] PCI: Small rearrangement of PCI probing code

This patch makes some small rearrangements of the PCI probing code in
order to make it possible for arch code to set up the PCI tree
without needing to duplicate code from the PCI layer unnecessarily.
PPC64 will use this to set up the PCI tree from the Open Firmware
device tree, which we need to do on logically-partitioned pSeries
systems.

Signed-off-by: Paul Mackerras <paulus@samba.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/drivers/pci/pci.h b/drivers/pci/pci.h
index d00168b1f66286f8f897a0f19ea0c44e977e5361..d3f3dd42240d79b52c0fdecf5e95333f17131246 100644 (file)
--- a/drivers/pci/pci.h
+++ b/drivers/pci/pci.h
@@ -29,7 +29,6 @@ static inline int pci_proc_detach_bus(struct pci_bus *bus) { return 0; }
 #endif
 
 /* Functions for PCI Hotplug drivers to use */
-extern struct pci_bus * pci_add_new_bus(struct pci_bus *parent, struct pci_dev *dev, int busnr);
 extern unsigned int pci_do_scan_bus(struct pci_bus *bus);
 extern int pci_remove_device_safe(struct pci_dev *dev);
 extern unsigned char pci_max_busnr(void);

diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c
index b9c9b03919d449ff967f7359bbd6049fe15c0dc4..35caec13023a0d236de67b11a06cd76cf734aed2 100644 (file)
--- a/drivers/pci/probe.c
+++ b/drivers/pci/probe.c
@@ -753,27 +753,19 @@ pci_scan_device(struct pci_bus *bus, int devfn)
                kfree(dev);
                return NULL;
        }
-       device_initialize(&dev->dev);
-       dev->dev.release = pci_release_dev;
-       pci_dev_get(dev);
-
-       dev->dev.dma_mask = &dev->dma_mask;
-       dev->dev.coherent_dma_mask = 0xffffffffull;
 
        return dev;
 }
 
-struct pci_dev * __devinit
-pci_scan_single_device(struct pci_bus *bus, int devfn)
+void __devinit pci_device_add(struct pci_dev *dev, struct pci_bus *bus)
 {
-       struct pci_dev *dev;
+       device_initialize(&dev->dev);
+       dev->dev.release = pci_release_dev;
+       pci_dev_get(dev);
 
-       dev = pci_scan_device(bus, devfn);
-       pci_scan_msi_device(dev);
+       dev->dev.dma_mask = &dev->dma_mask;
+       dev->dev.coherent_dma_mask = 0xffffffffull;
 
-       if (!dev)
-               return NULL;
-       
        /* Fix up broken headers */
        pci_fixup_device(pci_fixup_header, dev);
 
@@ -785,6 +777,19 @@ pci_scan_single_device(struct pci_bus *bus, int devfn)
        spin_lock(&pci_bus_lock);
        list_add_tail(&dev->bus_list, &bus->devices);
        spin_unlock(&pci_bus_lock);
+}
+
+struct pci_dev * __devinit
+pci_scan_single_device(struct pci_bus *bus, int devfn)
+{
+       struct pci_dev *dev;
+
+       dev = pci_scan_device(bus, devfn);
+       if (!dev)
+               return NULL;
+
+       pci_device_add(dev, bus);
+       pci_scan_msi_device(dev);
 
        return dev;
 }
@@ -881,7 +886,8 @@ unsigned int __devinit pci_do_scan_bus(struct pci_bus *bus)
        return max;
 }
 
-struct pci_bus * __devinit pci_scan_bus_parented(struct device *parent, int bus, struct pci_ops *ops, void *sysdata)
+struct pci_bus * __devinit pci_create_bus(struct device *parent,
+               int bus, struct pci_ops *ops, void *sysdata)
 {
        int error;
        struct pci_bus *b;
@@ -938,8 +944,6 @@ struct pci_bus * __devinit pci_scan_bus_parented(struct device *parent, int bus,
        b->resource[0] = &ioport_resource;
        b->resource[1] = &iomem_resource;
 
-       b->subordinate = pci_scan_child_bus(b);
-
        return b;
 
 sys_create_link_err:
@@ -957,6 +961,18 @@ err_out:
        kfree(b);
        return NULL;
 }
+EXPORT_SYMBOL_GPL(pci_create_bus);
+
+struct pci_bus * __devinit pci_scan_bus_parented(struct device *parent,
+               int bus, struct pci_ops *ops, void *sysdata)
+{
+       struct pci_bus *b;
+
+       b = pci_create_bus(parent, bus, ops, sysdata);
+       if (b)
+               b->subordinate = pci_scan_child_bus(b);
+       return b;
+}
 EXPORT_SYMBOL(pci_scan_bus_parented);
 
 #ifdef CONFIG_HOTPLUG

diff --git a/include/linux/pci.h b/include/linux/pci.h
index 609499356e07443f188758d1764564edf7852bfe..9c7aecf0c59905ae1eae899cc8dba3dae8265a20 100644 (file)
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -315,8 +315,11 @@ static inline struct pci_bus *pci_scan_bus(int bus, struct pci_ops *ops, void *s
                pci_bus_add_devices(root_bus);
        return root_bus;
 }
+struct pci_bus *pci_create_bus(struct device *parent, int bus, struct pci_ops *ops, void *sysdata);
+struct pci_bus * pci_add_new_bus(struct pci_bus *parent, struct pci_dev *dev, int busnr);
 int pci_scan_slot(struct pci_bus *bus, int devfn);
 struct pci_dev * pci_scan_single_device(struct pci_bus *bus, int devfn);
+void pci_device_add(struct pci_dev *dev, struct pci_bus *bus);
 unsigned int pci_scan_child_bus(struct pci_bus *bus);
 void pci_bus_add_device(struct pci_dev *dev);
 void pci_read_bridge_bases(struct pci_bus *child);