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| author | Linas Vepstas <linas@austin.ibm.com> | 2007-04-13 15:34:21 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2007-05-02 19:02:40 -0700 |
| commit | 8485d1a123e0d367bbcbfec36acf134e6895f39a (patch) | |
| tree | 7fdce4c4c4ec188cee71e16f3e49758599e55680 /drivers/pci | |
| parent | fea54b8cc9c8290b4c99d481c3e600c46eb18fd5 (diff) | |
| download | linux-rpi3-8485d1a123e0d367bbcbfec36acf134e6895f39a.tar.gz linux-rpi3-8485d1a123e0d367bbcbfec36acf134e6895f39a.tar.bz2 linux-rpi3-8485d1a123e0d367bbcbfec36acf134e6895f39a.zip | |
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>
Diffstat (limited to 'drivers/pci')
| -rw-r--r-- | drivers/pci/hotplug/rpadlpar_core.c | 18 |
1 files changed, 13 insertions, 5 deletions
diff --git a/drivers/pci/hotplug/rpadlpar_core.c b/drivers/pci/hotplug/rpadlpar_core.c index 72383467a0d5..4d74f0b6079f 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", |