This patch introduces a new function container_device_remove() to do the container hot-remove job. It works like the following: 1. call acpi_bus_trim(device, 0) to stop the container device. 2. generate the KOBJ_OFFLINE uevent. (Did I do this correct ?) 3. call acpi_bus_hot_remove_device(), which will call acpi_bus_trim(device, 1) to remove the container. This patch is based on Lu Yinghai's work. git://git.kernel.org/pub/scm/linux/kernel/git/yinghai/linux-yinghai.git for-pci-split-pci-root-hp-2 Signed-off-by: Tang Chen <tangchen@xxxxxxxxxxxxxx> --- drivers/acpi/container.c | 58 ++++++++++++++++++++++++++++++++++++++------- 1 files changed, 49 insertions(+), 9 deletions(-) diff --git a/drivers/acpi/container.c b/drivers/acpi/container.c index d300e03..9676578 100644 --- a/drivers/acpi/container.c +++ b/drivers/acpi/container.c @@ -166,6 +166,35 @@ static int container_device_add(struct acpi_device **device, acpi_handle handle) return result; } +static int container_device_remove(struct acpi_device *device) +{ + int ret; + struct acpi_eject_event *ej_event; + + /* stop container device at first */ + ret = acpi_bus_trim(device, 0); + printk(KERN_WARNING "acpi_bus_trim stop return %x\n", ret); + if (ret) + return ret; + + /* event originated from ACPI eject notification */ + device->flags.eject_pending = 1; + + /* send the uevent before remove the device */ + kobject_uevent(&device->dev.kobj, KOBJ_OFFLINE); + + ej_event = kmalloc(sizeof(*ej_event), GFP_KERNEL); + if (!ej_event) + return -ENOMEM; + + ej_event->device = device; + ej_event->event = ACPI_NOTIFY_EJECT_REQUEST; + + acpi_bus_hot_remove_device(ej_event); + + return 0; +} + static void __container_notify_cb(struct work_struct *work) { struct acpi_device *device = NULL; @@ -181,6 +210,9 @@ static void __container_notify_cb(struct work_struct *work) handle = hp_work->handle; type = hp_work->type; + present = is_device_present(handle); + status = acpi_bus_get_device(handle, &device); + switch (type) { case ACPI_NOTIFY_BUS_CHECK: /* Fall through */ @@ -189,13 +221,14 @@ static void __container_notify_cb(struct work_struct *work) (type == ACPI_NOTIFY_BUS_CHECK) ? "ACPI_NOTIFY_BUS_CHECK" : "ACPI_NOTIFY_DEVICE_CHECK"); - present = is_device_present(handle); - status = acpi_bus_get_device(handle, &device); if (!present) { if (ACPI_SUCCESS(status)) { /* device exist and this is a remove request */ - device->flags.eject_pending = 1; - kobject_uevent(&device->dev.kobj, KOBJ_OFFLINE); + result = container_device_remove(device); + if (result) { + printk(KERN_WARNING "Failed to remove container\n"); + break; + } return; } break; @@ -215,12 +248,19 @@ static void __container_notify_cb(struct work_struct *work) break; case ACPI_NOTIFY_EJECT_REQUEST: - if (!acpi_bus_get_device(handle, &device) && device) { - device->flags.eject_pending = 1; - kobject_uevent(&device->dev.kobj, KOBJ_OFFLINE); - return; + printk(KERN_WARNING "Container driver received %s event\n", + "ACPI_NOTIFY_EJECT_REQUEST"); + + if (!present || ACPI_FAILURE(status) || !device) + break; + + result = container_device_remove(device); + if (result) { + printk(KERN_WARNING "Failed to remove container\n"); + break; } - break; + + return; default: /* non-hotplug event; possibly handled by other handler */ -- 1.7.1 -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html