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PCI: acpiphp: Keep driver loaded even if no slots found

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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>
This commit is contained in:
Yinghai Lu 2013-01-21 13:20:50 -08:00 committed by Bjorn Helgaas
parent 121b090e7d
commit d59f53bc9b
3 changed files with 2 additions and 44 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

1
drivers/pci/hotplug/acpiphp.h
View file

@ -193,7 +193,6 @@ extern void acpiphp_unregister_hotplug_slot(struct acpiphp_slot *slot);
/* acpiphp_glue.c */
extern int acpiphp_glue_init (void);
extern void acpiphp_glue_exit (void);
extern int acpiphp_get_num_slots (void);
typedef int (*acpiphp_callback)(struct acpiphp_slot *slot, void *data);
extern int acpiphp_enable_slot (struct acpiphp_slot *slot);

23
drivers/pci/hotplug/acpiphp_core.c
View file

@ -50,7 +50,6 @@
bool acpiphp_debug;
/* local variables */
static int num_slots;
static struct acpiphp_attention_info *attention_info;
#define DRIVER_VERSION "0.5"
@ -272,25 +271,6 @@ static int get_adapter_status(struct hotplug_slot *hotplug_slot, u8 *value)
return 0;
}
static int __init init_acpi(void)
{
int retval;
/* initialize internal data structure etc. */
retval = acpiphp_glue_init();
/* read initial number of slots */
if (!retval) {
num_slots = acpiphp_get_num_slots();
if (num_slots == 0) {
acpiphp_glue_exit();
retval = -ENODEV;
}
}
return retval;
}
/**
* release_slot - free up the memory used by a slot
* @hotplug_slot: slot to free
@ -379,7 +359,8 @@ static int __init acpiphp_init(void)
return 0;
/* read all the ACPI info from the system */
return init_acpi();
/* initialize internal data structure etc. */
return acpiphp_glue_init();
}

22
drivers/pci/hotplug/acpiphp_glue.c
View file

@ -1416,28 +1416,6 @@ void acpiphp_glue_exit(void)
acpi_pci_unregister_driver(&acpi_pci_hp_driver);
}
/**
* acpiphp_get_num_slots - count number of slots in a system
*/
int __init acpiphp_get_num_slots(void)
{
struct acpiphp_bridge *bridge;
int num_slots = 0;
list_for_each_entry(bridge, &bridge_list, list) {
dbg("Bus %04x:%02x has %d slot%s\n",
pci_domain_nr(bridge->pci_bus),
bridge->pci_bus->number, bridge->nr_slots,
bridge->nr_slots == 1 ? "" : "s");
num_slots += bridge->nr_slots;
}
dbg("Total %d slots\n", num_slots);
return num_slots;
}
/**
* acpiphp_enable_slot - power on slot
* @slot: ACPI PHP slot