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[PATCH] powerpc: fix dynamic PCI probe regression

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Some hotplug driver functions were migrated to the kernel for use by EEH
in commit 2bf6a8fa21.

Previously, the PCI Hotplug module had been changed to use the new
OFDT-based PCI probe when appropriate:
5fa80fcdca

When rpaphp_pci_config_slot() was moved from the rpaphp driver to the
new kernel function pcibios_add_pci_devices(), the OFDT-based probe
stuff was dropped.  This patch restores it.

Signed-off-by: John Rose <johnrose@austin.ibm.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
This commit is contained in:
John Rose 2006-02-24 11:34:23 -06:00 committed by Paul Mackerras
parent a8b76b4915
commit 827c1a6c1a
3 changed files with 38 additions and 19 deletions
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14
arch/powerpc/platforms/pseries/eeh.c
View file

@ -893,6 +893,20 @@ void eeh_add_device_tree_early(struct device_node *dn)
}
EXPORT_SYMBOL_GPL(eeh_add_device_tree_early);
void eeh_add_device_tree_late(struct pci_bus *bus)
{
struct pci_dev *dev;
list_for_each_entry(dev, &bus->devices, bus_list) {
eeh_add_device_late(dev);
if (dev->hdr_type == PCI_HEADER_TYPE_BRIDGE) {
struct pci_bus *subbus = dev->subordinate;
if (subbus)
eeh_add_device_tree_late(subbus);
}
}
}
/**
* eeh_add_device_late - perform EEH initialization for the indicated pci device
* @dev: pci device for which to set up EEH

36
arch/powerpc/platforms/pseries/pci_dlpar.c
View file

@ -106,6 +106,8 @@ pcibios_fixup_new_pci_devices(struct pci_bus *bus, int fix_bus)
}
}
}
eeh_add_device_tree_late(bus);
}
EXPORT_SYMBOL_GPL(pcibios_fixup_new_pci_devices);
@ -114,7 +116,6 @@ pcibios_pci_config_bridge(struct pci_dev *dev)
{
u8 sec_busno;
struct pci_bus *child_bus;
struct pci_dev *child_dev;
/* Get busno of downstream bus */
pci_read_config_byte(dev, PCI_SECONDARY_BUS, &sec_busno);
@ -129,10 +130,6 @@ pcibios_pci_config_bridge(struct pci_dev *dev)
pci_scan_child_bus(child_bus);
list_for_each_entry(child_dev, &child_bus->devices, bus_list) {
eeh_add_device_late(child_dev);
}
/* Fixup new pci devices without touching bus struct */
pcibios_fixup_new_pci_devices(child_bus, 0);
@ -160,18 +157,25 @@ pcibios_add_pci_devices(struct pci_bus * bus)
eeh_add_device_tree_early(dn);
/* pci_scan_slot should find all children */
slotno = PCI_SLOT(PCI_DN(dn->child)->devfn);
num = pci_scan_slot(bus, PCI_DEVFN(slotno, 0));
if (num) {
pcibios_fixup_new_pci_devices(bus, 1);
pci_bus_add_devices(bus);
}
if (_machine == PLATFORM_PSERIES_LPAR) {
/* use ofdt-based probe */
of_scan_bus(dn, bus);
if (!list_empty(&bus->devices)) {
pcibios_fixup_new_pci_devices(bus, 0);
pci_bus_add_devices(bus);
}
} else {
/* use legacy probe */
slotno = PCI_SLOT(PCI_DN(dn->child)->devfn);
num = pci_scan_slot(bus, PCI_DEVFN(slotno, 0));
if (num) {
pcibios_fixup_new_pci_devices(bus, 1);
pci_bus_add_devices(bus);
}
list_for_each_entry(dev, &bus->devices, bus_list) {
eeh_add_device_late (dev);
if (dev->hdr_type == PCI_HEADER_TYPE_BRIDGE)
pcibios_pci_config_bridge(dev);
list_for_each_entry(dev, &bus->devices, bus_list)
if (dev->hdr_type == PCI_HEADER_TYPE_BRIDGE)
pcibios_pci_config_bridge(dev);
}
}
EXPORT_SYMBOL_GPL(pcibios_add_pci_devices);

7
include/asm-powerpc/eeh.h
View file

@ -27,6 +27,7 @@
#include <linux/string.h>
struct pci_dev;
struct pci_bus;
struct device_node;
#ifdef CONFIG_EEH
@ -61,7 +62,7 @@ void __init pci_addr_cache_build(void);
*/
void eeh_add_device_early(struct device_node *);
void eeh_add_device_tree_early(struct device_node *);
void eeh_add_device_late(struct pci_dev *);
void eeh_add_device_tree_late(struct pci_bus *);
/**
* eeh_remove_device - undo EEH setup for the indicated pci device
@ -116,12 +117,12 @@ static inline void pci_addr_cache_build(void) { }
static inline void eeh_add_device_early(struct device_node *dn) { }
static inline void eeh_add_device_late(struct pci_dev *dev) { }
static inline void eeh_remove_device(struct pci_dev *dev) { }
static inline void eeh_add_device_tree_early(struct device_node *dn) { }
static inline void eeh_add_device_tree_late(struct pci_bus *bus) { }
static inline void eeh_remove_bus_device(struct pci_dev *dev) { }
#define EEH_POSSIBLE_ERROR(val, type) (0)
#define EEH_IO_ERROR_VALUE(size) (-1UL)