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authorJiang Liu <liuj97@gmail.com>2013-04-12 05:44:25 +0000
committerBjorn Helgaas <bhelgaas@google.com>2013-04-12 15:38:25 -0600
commit6037a803b05eef9943fb64982e19964007fb7478 (patch)
tree3e15b1dfef971b65175c665f97d3ea70507423a8 /drivers/pci
parent5c0b04e3d913c91aee6e48e567e20a3f67849618 (diff)
PCI: acpiphp: Convert acpiphp to be builtin only, not modular
Convert acpiphp to be builtin only, with no module option. Previously, when HOTPLUG_PCI_ACPI=m, users could disable acpiphp by removing the module or preventing it from loading. That can't be done if acpiphp is builtin statically, so this adds an "acpiphp.disable" kernel parameter. If a user needs to use this parameter, it is a bug, and we want to hear about it. [bhelgaas: fold in acpiphp.disable here, remove documentation] Signed-off-by: Jiang Liu <jiang.liu@huawei.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Diffstat (limited to 'drivers/pci')
-rw-r--r--drivers/pci/hotplug/Kconfig7
-rw-r--r--drivers/pci/hotplug/acpiphp.h1
-rw-r--r--drivers/pci/hotplug/acpiphp_core.c19
3 files changed, 10 insertions, 17 deletions
diff --git a/drivers/pci/hotplug/Kconfig b/drivers/pci/hotplug/Kconfig
index 13e9e63a726..9fcb87f353d 100644
--- a/drivers/pci/hotplug/Kconfig
+++ b/drivers/pci/hotplug/Kconfig
@@ -52,15 +52,12 @@ config HOTPLUG_PCI_IBM
When in doubt, say N.
config HOTPLUG_PCI_ACPI
- tristate "ACPI PCI Hotplug driver"
- depends on (!ACPI_DOCK && ACPI) || (ACPI_DOCK)
+ bool "ACPI PCI Hotplug driver"
+ depends on HOTPLUG_PCI=y && ((!ACPI_DOCK && ACPI) || (ACPI_DOCK))
help
Say Y here if you have a system that supports PCI Hotplug using
ACPI.
- To compile this driver as a module, choose M here: the
- module will be called acpiphp.
-
When in doubt, say N.
config HOTPLUG_PCI_ACPI_IBM
diff --git a/drivers/pci/hotplug/acpiphp.h b/drivers/pci/hotplug/acpiphp.h
index 1b311f9db82..b06ae681d5b 100644
--- a/drivers/pci/hotplug/acpiphp.h
+++ b/drivers/pci/hotplug/acpiphp.h
@@ -190,5 +190,6 @@ extern u8 acpiphp_get_adapter_status (struct acpiphp_slot *slot);
/* variables */
extern bool acpiphp_debug;
+extern bool acpiphp_disabled;
#endif /* _ACPIPHP_H */
diff --git a/drivers/pci/hotplug/acpiphp_core.c b/drivers/pci/hotplug/acpiphp_core.c
index c2fd3095701..81adbfa4df1 100644
--- a/drivers/pci/hotplug/acpiphp_core.c
+++ b/drivers/pci/hotplug/acpiphp_core.c
@@ -48,6 +48,7 @@
#define SLOT_NAME_SIZE 21 /* {_SUN} */
bool acpiphp_debug;
+bool acpiphp_disabled;
/* local variables */
static struct acpiphp_attention_info *attention_info;
@@ -60,7 +61,9 @@ MODULE_AUTHOR(DRIVER_AUTHOR);
MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_LICENSE("GPL");
MODULE_PARM_DESC(debug, "Debugging mode enabled or not");
+MODULE_PARM_DESC(disable, "disable acpiphp driver");
module_param_named(debug, acpiphp_debug, bool, 0644);
+module_param_named(disable, acpiphp_disabled, bool, 0444);
/* export the attention callback registration methods */
EXPORT_SYMBOL_GPL(acpiphp_register_attention);
@@ -353,9 +356,11 @@ void acpiphp_unregister_hotplug_slot(struct acpiphp_slot *acpiphp_slot)
static int __init acpiphp_init(void)
{
- info(DRIVER_DESC " version: " DRIVER_VERSION "\n");
+ info(DRIVER_DESC " version: " DRIVER_VERSION "%s\n",
+ acpiphp_disabled ? ", disabled by user; please report a bug"
+ : "");
- if (acpi_pci_disabled)
+ if (acpi_pci_disabled || acpiphp_disabled)
return 0;
/* read all the ACPI info from the system */
@@ -364,14 +369,4 @@ static int __init acpiphp_init(void)
}
-static void __exit acpiphp_exit(void)
-{
- if (acpi_pci_disabled)
- return;
-
- /* deallocate internal data structures etc. */
- acpiphp_glue_exit();
-}
-
module_init(acpiphp_init);
-module_exit(acpiphp_exit);