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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>
hifive-unleashed-5.1
Jiang Liu 2013-04-12 05:44:25 +00:00 committed by Bjorn Helgaas
parent 5c0b04e3d9
commit 6037a803b0
3 changed files with 10 additions and 17 deletions
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7
drivers/pci/hotplug/Kconfig
View File

@ -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

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

@ -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 */

19
drivers/pci/hotplug/acpiphp_core.c
View File

@ -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);