From 828f37683e6d3ab5912989df0d04201db7ad798e Mon Sep 17 00:00:00 2001 From: Alex Chiang Date: Mon, 20 Oct 2008 17:40:52 -0600 Subject: 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 Signed-off-by: Alex Chiang Signed-off-by: Jesse Barnes --- drivers/pci/slot.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) (limited to 'drivers/pci/slot.c') diff --git a/drivers/pci/slot.c b/drivers/pci/slot.c index b9b90ab6b86..0e009c3ba5f 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/ + * @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; -- cgit v1.2.3