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authorToshi Kani <toshi.kani@hp.com>2012-11-01 15:42:13 +0100
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2012-11-15 00:16:04 +0100
commitc5b18e22e74dc7dbd3f7729997a3a553ce761d2b (patch)
tree0f9f0f503ee42498b7023cf0309c86a9644ee585 /drivers/acpi/processor_driver.c
parentACPI: Export functions for hot-remove (diff)
downloadlinux-c5b18e22e74dc7dbd3f7729997a3a553ce761d2b.tar.xz
linux-c5b18e22e74dc7dbd3f7729997a3a553ce761d2b.zip
ACPI: Add ACPI CPU hot-remove support
Added support of CPU hot-remove via an ACPI eject notification. It calls acpi_bus_hot_remove_device(), which shares the same code path with the sysfs eject operation. acpi_os_hotplug_execute() runs the hot-remove operation in kacpi_hotplug_wq and serializes it between ACPI hot-remove and sysfs eject requests. Signed-off-by: Toshi Kani <toshi.kani@hp.com> Reviewed-by: Yasuaki Ishimatsu <isimatu.yasuaki@jp.fujitsu.com> Tested-by: IgorMammedov <imammedo@redhat.com> Tested-by: Vijay Mohan Pandarathil <vijaymohan.pandarathil@hp.com> Tested-by: Prarit Bhargava <prarit@redhat.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'drivers/acpi/processor_driver.c')
-rw-r--r--drivers/acpi/processor_driver.c27
1 files changed, 17 insertions, 10 deletions
diff --git a/drivers/acpi/processor_driver.c b/drivers/acpi/processor_driver.c
index a4352b88a331..8cc33d0e5d8f 100644
--- a/drivers/acpi/processor_driver.c
+++ b/drivers/acpi/processor_driver.c
@@ -695,8 +695,8 @@ int acpi_processor_device_add(acpi_handle handle, struct acpi_device **device)
static void acpi_processor_hotplug_notify(acpi_handle handle,
u32 event, void *data)
{
- struct acpi_processor *pr;
struct acpi_device *device = NULL;
+ struct acpi_eject_event *ej_event = NULL;
u32 ost_code = ACPI_OST_SC_NON_SPECIFIC_FAILURE; /* default */
int result;
@@ -728,20 +728,27 @@ static void acpi_processor_hotplug_notify(acpi_handle handle,
"received ACPI_NOTIFY_EJECT_REQUEST\n"));
if (acpi_bus_get_device(handle, &device)) {
- printk(KERN_ERR PREFIX
- "Device don't exist, dropping EJECT\n");
+ pr_err(PREFIX "Device don't exist, dropping EJECT\n");
break;
}
- pr = acpi_driver_data(device);
- if (!pr) {
- printk(KERN_ERR PREFIX
- "Driver data is NULL, dropping EJECT\n");
+ if (!acpi_driver_data(device)) {
+ pr_err(PREFIX "Driver data is NULL, dropping EJECT\n");
break;
}
- /* REVISIT: update when eject is supported */
- ost_code = ACPI_OST_SC_EJECT_NOT_SUPPORTED;
- break;
+ ej_event = kmalloc(sizeof(*ej_event), GFP_KERNEL);
+ if (!ej_event) {
+ pr_err(PREFIX "No memory, dropping EJECT\n");
+ break;
+ }
+
+ ej_event->handle = handle;
+ ej_event->event = ACPI_NOTIFY_EJECT_REQUEST;
+ acpi_os_hotplug_execute(acpi_bus_hot_remove_device,
+ (void *)ej_event);
+
+ /* eject is performed asynchronously */
+ return;
default:
ACPI_DEBUG_PRINT((ACPI_DB_INFO,