From johnrose@austin.ibm.com Mon Jul 25 11:19:26 2005
Date: Mon, 25 Jul 2005 10:16:53 -0500
From: John Rose <johnrose@austin.ibm.com>
To: greg@kroah.com
Cc: John Rose <johnrose@austin.ibm.com>, pcihpd-discuss@lists.sourceforge.net,
wortman@us.ibm.com
Message-Id: <20050725151243.7004.83478.sendpatchset@sinatra.austin.ibm.com>
Subject: PCI Hotplug: rpaphp: Remove rpaphp_find_pci
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>
---
drivers/pci/hotplug/rpadlpar_core.c | 35 +++++++++++------
drivers/pci/hotplug/rpaphp.h | 1
drivers/pci/hotplug/rpaphp_pci.c | 72 ++++++++++++------------------------
3 files changed, 47 insertions(+), 61 deletions(-)
--- gregkh-2.6.orig/drivers/pci/hotplug/rpaphp_pci.c 2005-07-26 16:10:22.000000000 -0700
+++ gregkh-2.6/drivers/pci/hotplug/rpaphp_pci.c 2005-07-26 16:10:25.000000000 -0700
@@ -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 @@
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 @@
*/
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 @@
/* 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 @@
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;
}
--- gregkh-2.6.orig/drivers/pci/hotplug/rpadlpar_core.c 2005-07-26 16:10:22.000000000 -0700
+++ gregkh-2.6/drivers/pci/hotplug/rpadlpar_core.c 2005-07-26 16:10:25.000000000 -0700
@@ -165,6 +165,20 @@
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 @@
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;
}
--- gregkh-2.6.orig/drivers/pci/hotplug/rpaphp.h 2005-07-26 16:10:22.000000000 -0700
+++ gregkh-2.6/drivers/pci/hotplug/rpaphp.h 2005-07-26 16:10:25.000000000 -0700
@@ -93,7 +93,6 @@
/* 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);