diff options
| author | Alex Chiang <achiang@hp.com> | 2008-10-21 03:40:52 +0400 |
|---|---|---|
| committer | Jesse Barnes <jbarnes@virtuousgeek.org> | 2008-10-23 03:42:38 +0400 |
| commit | 828f37683e6d3ab5912989df0d04201db7ad798e (patch) | |
| tree | 5761f28363b8fd4b23eaf88305b3f29cfc6b92ba /drivers | |
| parent | d25b7c8d6ba2735602003d75a28894772fe8ad6a (diff) | |
| download | linux-828f37683e6d3ab5912989df0d04201db7ad798e.tar.xz | |
PCI: update pci_create_slot() to take a 'hotplug' param
Slot detection drivers can co-exist with hotplug drivers. The names
of the detected/claimed slots may be different depending on module
load order.
For legacy reasons, we need to allow hotplug drivers to override
the slot name if a detection driver is loaded first (and they find
the same slots).
Creating and overriding slot names should be an atomic operation,
otherwise you get a locking nightmare as various drivers race to
call pci_create_slot().
pci_create_slot() is already serialized by grabbing the pci_bus_sem.
We update the API and add a 'hotplug' param, which is:
set if the caller is a hotplug driver
NULL if the caller is a detection driver
pci_create_slot() does not actually use the 'hotplug' parameter in this
patch. A later patch will add the logic that uses it.
Cc: kristen.c.accardi@intel.com
Cc: matthew@wil.cx
Acked-by: Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com>
Signed-off-by: Alex Chiang <achiang@hp.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/acpi/pci_slot.c | 2 | ||||
| -rw-r--r-- | drivers/pci/hotplug/pci_hotplug_core.c | 2 | ||||
| -rw-r--r-- | drivers/pci/slot.c | 4 |
3 files changed, 5 insertions, 3 deletions
diff --git a/drivers/acpi/pci_slot.c b/drivers/acpi/pci_slot.c index d5b4ef898879..8d4a568be1cc 100644 --- a/drivers/acpi/pci_slot.c +++ b/drivers/acpi/pci_slot.c @@ -150,7 +150,7 @@ register_slot(acpi_handle handle, u32 lvl, void *context, void **rv) } snprintf(name, sizeof(name), "%u", (u32)sun); - pci_slot = pci_create_slot(pci_bus, device, name); + pci_slot = pci_create_slot(pci_bus, device, name, NULL); if (IS_ERR(pci_slot)) { err("pci_create_slot returned %ld\n", PTR_ERR(pci_slot)); kfree(slot); diff --git a/drivers/pci/hotplug/pci_hotplug_core.c b/drivers/pci/hotplug/pci_hotplug_core.c index 02b1ae12a2e6..1cdeb642fdcf 100644 --- a/drivers/pci/hotplug/pci_hotplug_core.c +++ b/drivers/pci/hotplug/pci_hotplug_core.c @@ -579,7 +579,7 @@ int pci_hp_register(struct hotplug_slot *slot, struct pci_bus *bus, int slot_nr, * driver and call it here again. If we've already created the * pci_slot, the interface will simply bump the refcount. */ - pci_slot = pci_create_slot(bus, slot_nr, name); + pci_slot = pci_create_slot(bus, slot_nr, name, slot); if (IS_ERR(pci_slot)) return PTR_ERR(pci_slot); diff --git a/drivers/pci/slot.c b/drivers/pci/slot.c index b9b90ab6b861..0e009c3ba5fd 100644 --- a/drivers/pci/slot.c +++ b/drivers/pci/slot.c @@ -83,6 +83,7 @@ static struct kobj_type pci_slot_ktype = { * @parent: struct pci_bus of parent bridge * @slot_nr: PCI_SLOT(pci_dev->devfn) or -1 for placeholder * @name: user visible string presented in /sys/bus/pci/slots/<name> + * @hotplug: set if caller is hotplug driver, NULL otherwise * * PCI slots have first class attributes such as address, speed, width, * and a &struct pci_slot is used to manage them. This interface will @@ -111,7 +112,8 @@ static struct kobj_type pci_slot_ktype = { */ struct pci_slot *pci_create_slot(struct pci_bus *parent, int slot_nr, - const char *name) + const char *name, + struct hotplug_slot *hotplug) { struct pci_dev *dev; struct pci_slot *slot; |