From: Thomas Renninger <trenn@xxxxxxx>
Signed-off-by: Thomas Renninger <trenn@xxxxxxx>
Cc: Len Brown <lenb@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
drivers/acpi/processor_core.c | 13 +++++++++----
1 file changed, 9 insertions(+), 4 deletions(-)
diff -puN drivers/acpi/processor_core.c~exit-acpi-processor-module-gracefully-if-acpi-is-disabled drivers/acpi/processor_core.c
--- a/drivers/acpi/processor_core.c~exit-acpi-processor-module-gracefully-if-acpi-is-disabled
+++ a/drivers/acpi/processor_core.c
@@ -993,6 +993,8 @@ void acpi_processor_uninstall_hotplug_no
* ACPI, but needs symbols from this driver
*/
+static int processor_driver_registered;
+
static int __init acpi_processor_init(void)
{
int result = 0;
@@ -1018,6 +1020,8 @@ static int __init acpi_processor_init(vo
return result;
}
+ processor_driver_registered = 1;
+
acpi_processor_install_hotplug_notify();
acpi_thermal_cpufreq_init();
@@ -1034,12 +1038,13 @@ static void __exit acpi_processor_exit(v
acpi_thermal_cpufreq_exit();
- acpi_processor_uninstall_hotplug_notify();
-
- acpi_bus_unregister_driver(&acpi_processor_driver);
+ if (processor_driver_registered) {
+ acpi_processor_uninstall_hotplug_notify();
- remove_proc_entry(ACPI_PROCESSOR_CLASS, acpi_root_dir);
+ acpi_bus_unregister_driver(&acpi_processor_driver);
+ remove_proc_entry(ACPI_PROCESSOR_CLASS, acpi_root_dir);
+ }
return;
}
_
-
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