PCI: acpiphp: Keep driver loaded even if no slots found
Could have root bus hot-added later and there may be slots that need acpiphp. The result returned by acpiphp_get_num_slots() is meaningless, because the bridge the slots are under may be added after this function has been called, so drop acpiphp_get_num_slots() and the code using it. Signed-off-by: Yinghai Lu <yinghai@kernel.org> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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@ -193,7 +193,6 @@ extern void acpiphp_unregister_hotplug_slot(struct acpiphp_slot *slot);
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/* acpiphp_glue.c */
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extern int acpiphp_glue_init (void);
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extern void acpiphp_glue_exit (void);
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extern int acpiphp_get_num_slots (void);
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typedef int (*acpiphp_callback)(struct acpiphp_slot *slot, void *data);
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extern int acpiphp_enable_slot (struct acpiphp_slot *slot);
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@ -50,7 +50,6 @@
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bool acpiphp_debug;
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/* local variables */
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static int num_slots;
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static struct acpiphp_attention_info *attention_info;
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#define DRIVER_VERSION "0.5"
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@ -272,25 +271,6 @@ static int get_adapter_status(struct hotplug_slot *hotplug_slot, u8 *value)
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return 0;
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}
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static int __init init_acpi(void)
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{
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int retval;
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/* initialize internal data structure etc. */
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retval = acpiphp_glue_init();
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/* read initial number of slots */
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if (!retval) {
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num_slots = acpiphp_get_num_slots();
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if (num_slots == 0) {
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acpiphp_glue_exit();
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retval = -ENODEV;
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}
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}
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return retval;
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}
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/**
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* release_slot - free up the memory used by a slot
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* @hotplug_slot: slot to free
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@ -379,7 +359,8 @@ static int __init acpiphp_init(void)
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return 0;
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/* read all the ACPI info from the system */
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return init_acpi();
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/* initialize internal data structure etc. */
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return acpiphp_glue_init();
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}
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@ -1416,28 +1416,6 @@ void acpiphp_glue_exit(void)
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acpi_pci_unregister_driver(&acpi_pci_hp_driver);
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}
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/**
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* acpiphp_get_num_slots - count number of slots in a system
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*/
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int __init acpiphp_get_num_slots(void)
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{
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struct acpiphp_bridge *bridge;
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int num_slots = 0;
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list_for_each_entry(bridge, &bridge_list, list) {
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dbg("Bus %04x:%02x has %d slot%s\n",
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pci_domain_nr(bridge->pci_bus),
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bridge->pci_bus->number, bridge->nr_slots,
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bridge->nr_slots == 1 ? "" : "s");
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num_slots += bridge->nr_slots;
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}
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dbg("Total %d slots\n", num_slots);
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return num_slots;
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}
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/**
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* acpiphp_enable_slot - power on slot
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* @slot: ACPI PHP slot
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