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[PATCH] PCI Hotplug: rpaphp: Remove rpaphp_find_pci

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The rpaphp module currently uses a fragile method to find a pci device
by its device node.  This function is unnecessary, so this patch scraps
it.

Signed-off-by: John Rose <johnrose@austin.ibm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
John Rose 2005-07-25 10:16:53 -05:00 committed by Greg Kroah-Hartman
parent 9c209c919d
commit 0945cd5f90
3 changed files with 47 additions and 61 deletions
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35
drivers/pci/hotplug/rpadlpar_core.c
View File

@ -165,6 +165,20 @@ static int pci_add_secondary_bus(struct device_node *dn,
return 0;
}
static struct pci_dev *dlpar_find_new_dev(struct pci_bus *parent,
struct device_node *dev_dn)
{
struct pci_dev *tmp = NULL;
struct device_node *child_dn;
list_for_each_entry(tmp, &parent->devices, bus_list) {
child_dn = pci_device_to_OF_node(tmp);
if (child_dn == dev_dn)
return tmp;
}
return NULL;
}
static struct pci_dev *dlpar_pci_add_bus(struct device_node *dn)
{
struct pci_controller *hose = dn->phb;
@ -180,21 +194,18 @@ static struct pci_dev *dlpar_pci_add_bus(struct device_node *dn)
pci_bus_add_devices(hose->bus);
/* Confirm new bridge dev was created */
dev = rpaphp_find_pci_dev(dn);
if (!dev) {
printk(KERN_ERR "%s: failed to add pci device\n", __FUNCTION__);
return NULL;
}
dev = dlpar_find_new_dev(hose->bus, dn);
if (dev) {
if (dev->hdr_type != PCI_HEADER_TYPE_BRIDGE) {
printk(KERN_ERR "%s: unexpected header type %d\n",
__FUNCTION__, dev->hdr_type);
return NULL;
}
if (dev->hdr_type != PCI_HEADER_TYPE_BRIDGE) {
printk(KERN_ERR "%s: unexpected header type %d\n",
__FUNCTION__, dev->hdr_type);
return NULL;
if (pci_add_secondary_bus(dn, dev))
return NULL;
}
if (pci_add_secondary_bus(dn, dev))
return NULL;
return dev;
}

1
drivers/pci/hotplug/rpaphp.h
View File

@ -93,7 +93,6 @@ extern int num_slots;
/* function prototypes */
/* rpaphp_pci.c */
extern struct pci_dev *rpaphp_find_pci_dev(struct device_node *dn);
extern int rpaphp_claim_resource(struct pci_dev *dev, int resource);
extern int rpaphp_enable_pci_slot(struct slot *slot);
extern int register_pci_slot(struct slot *slot);

72
drivers/pci/hotplug/rpaphp_pci.c
View File

@ -30,22 +30,7 @@
#include "rpaphp.h"
struct pci_dev *rpaphp_find_pci_dev(struct device_node *dn)
{
struct pci_dev *dev = NULL;
char bus_id[BUS_ID_SIZE];
sprintf(bus_id, "%04x:%02x:%02x.%d", dn->phb->global_number,
dn->busno, PCI_SLOT(dn->devfn), PCI_FUNC(dn->devfn));
for_each_pci_dev(dev) {
if (!strcmp(pci_name(dev), bus_id)) {
break;
}
}
return dev;
}
struct pci_bus *find_bus_among_children(struct pci_bus *bus,
static struct pci_bus *find_bus_among_children(struct pci_bus *bus,
struct device_node *dn)
{
struct pci_bus *child = NULL;
@ -64,15 +49,14 @@ struct pci_bus *find_bus_among_children(struct pci_bus *bus,
return child;
}
struct pci_bus *rpaphp_find_pci_bus(struct device_node *dn)
static struct pci_bus *rpaphp_find_pci_bus(struct device_node *dn)
{
BUG_ON(!dn->phb || !dn->phb->bus);
if (!dn->phb || !dn->phb->bus)
return NULL;
return find_bus_among_children(dn->phb->bus, dn);
}
EXPORT_SYMBOL_GPL(rpaphp_find_pci_dev);
int rpaphp_claim_resource(struct pci_dev *dev, int resource)
{
struct resource *res = &dev->resource[resource];
@ -137,9 +121,8 @@ static int rpaphp_get_sensor_state(struct slot *slot, int *state)
*/
int rpaphp_get_pci_adapter_status(struct slot *slot, int is_init, u8 * value)
{
struct pci_bus *bus;
int state, rc;
struct device_node *child_dn;
struct pci_dev *child_dev = NULL;
*value = NOT_VALID;
rc = rpaphp_get_sensor_state(slot, &state);
@ -156,20 +139,11 @@ int rpaphp_get_pci_adapter_status(struct slot *slot, int is_init, u8 * value)
/* config/unconfig adapter */
*value = slot->state;
} else {
child_dn = slot->dn->child;
if (child_dn)
child_dev = rpaphp_find_pci_dev(child_dn);
if (child_dev)
*value = CONFIGURED;
else if (!child_dn)
dbg("%s: %s is not valid OFDT node\n",
__FUNCTION__, slot->dn->full_name);
else {
err("%s: can't find pdev of adapter in slot[%s]\n",
__FUNCTION__, slot->dn->full_name);
bus = rpaphp_find_pci_bus(slot->dn);
if (bus && !list_empty(&bus->devices))
*value = CONFIGURED;
else
*value = NOT_CONFIGURED;
}
}
}
exit:
@ -252,24 +226,26 @@ rpaphp_pci_config_slot(struct device_node *dn, struct pci_bus *bus)
int num;
dbg("Enter %s: dn=%s bus=%s\n", __FUNCTION__, dn->full_name, bus->name);
if (!dn->child)
return NULL;
if (dn->child) {
slotno = PCI_SLOT(dn->child->devfn);
slotno = PCI_SLOT(dn->child->devfn);
/* pci_scan_slot should find all children */
num = pci_scan_slot(bus, PCI_DEVFN(slotno, 0));
if (num) {
rpaphp_fixup_new_pci_devices(bus, 1);
pci_bus_add_devices(bus);
}
dev = rpaphp_find_pci_dev(dn->child);
if (!dev) {
err("No new device found\n");
return NULL;
}
/* pci_scan_slot should find all children */
num = pci_scan_slot(bus, PCI_DEVFN(slotno, 0));
if (num) {
rpaphp_fixup_new_pci_devices(bus, 1);
pci_bus_add_devices(bus);
}
if (list_empty(&bus->devices)) {
err("%s: No new device found\n", __FUNCTION__);
return NULL;
}
list_for_each_entry(dev, &bus->devices, bus_list) {
if (dev->hdr_type == PCI_HEADER_TYPE_BRIDGE)
rpaphp_pci_config_bridge(dev);
}
return dev;
}