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authorLinas Vepstas <linas@austin.ibm.com>2007-04-13 15:34:21 -0700
committerGreg Kroah-Hartman <gregkh@suse.de>2007-05-02 19:02:40 -0700
commit8485d1a123e0d367bbcbfec36acf134e6895f39a (patch)
tree7fdce4c4c4ec188cee71e16f3e49758599e55680
parentfea54b8cc9c8290b4c99d481c3e600c46eb18fd5 (diff)
PCI: rpaphp: Document find_php_slot()
Document some of the interaction between dlpar and hotplug. viz, the a dlpar remove of a htoplug slot uses hotplug to remove it. Signed-off-by: Linas Vepstas <linas@austin.ibm.com> Cc: John Rose <johnrose@austin.ibm.com> Signed-off-by: Kristen Carlson Accardi <kristen.c.accardi@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
-rw-r--r--drivers/pci/hotplug/rpadlpar_core.c18
1 files changed, 13 insertions, 5 deletions
diff --git a/drivers/pci/hotplug/rpadlpar_core.c b/drivers/pci/hotplug/rpadlpar_core.c
index 72383467a0d..4d74f0b6079 100644
--- a/drivers/pci/hotplug/rpadlpar_core.c
+++ b/drivers/pci/hotplug/rpadlpar_core.c
@@ -98,7 +98,15 @@ static struct device_node *find_dlpar_node(char *drc_name, int *node_type)
return NULL;
}
-static struct slot *find_slot(struct device_node *dn)
+/**
+ * find_php_slot - return hotplug slot structure for device node
+ *
+ * This routine will return the hotplug slot structure
+ * for a given device node. Note that built-in PCI slots
+ * may be dlpar-able, but not hot-pluggable, so this routine
+ * will return NULL for built-in PCI slots.
+ */
+static struct slot *find_php_slot(struct device_node *dn)
{
struct list_head *tmp, *n;
struct slot *slot;
@@ -224,9 +232,9 @@ static int dlpar_remove_phb(char *drc_name, struct device_node *dn)
if (!pcibios_find_pci_bus(dn))
return -EINVAL;
- slot = find_slot(dn);
+ /* If pci slot is hotplugable, use hotplug to remove it */
+ slot = find_php_slot(dn);
if (slot) {
- /* Remove hotplug slot */
if (rpaphp_deregister_slot(slot)) {
printk(KERN_ERR
"%s: unable to remove hotplug slot %s\n",
@@ -370,9 +378,9 @@ int dlpar_remove_pci_slot(char *drc_name, struct device_node *dn)
if (!bus)
return -EINVAL;
- slot = find_slot(dn);
+ /* If pci slot is hotplugable, use hotplug to remove it */
+ slot = find_php_slot(dn);
if (slot) {
- /* Remove hotplug slot */
if (rpaphp_deregister_slot(slot)) {
printk(KERN_ERR
"%s: unable to remove hotplug slot %s\n",