diff options
| author | Shaohua Li <shaohua.li@intel.com> | 2008-08-28 10:03:26 +0800 |
|---|---|---|
| committer | Len Brown <len.brown@intel.com> | 2008-09-23 22:59:29 -0400 |
| commit | 406f692d0803d73acd3984c1e11719d3a913fd5e (patch) | |
| tree | a1c0b1c5e6f9478e9b3fff91561f2173bd789023 /drivers/acpi/dock.c | |
| parent | 82545394e0690aaef446cb262aa5dac0f9c7156e (diff) | |
| download | lwn-406f692d0803d73acd3984c1e11719d3a913fd5e.tar.gz lwn-406f692d0803d73acd3984c1e11719d3a913fd5e.zip | |
dock: add _LCK support
support _LCK method, which is a optional method for hotplug
lenb: we have not seen _LCK used in the field yet
Signed-off-by: Shaohua Li <shaohua.li@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'drivers/acpi/dock.c')
| -rw-r--r-- | drivers/acpi/dock.c | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/drivers/acpi/dock.c b/drivers/acpi/dock.c index 78d27cef573f..7bdf93b74690 100644 --- a/drivers/acpi/dock.c +++ b/drivers/acpi/dock.c @@ -452,6 +452,25 @@ static inline void complete_undock(struct dock_station *ds) ds->flags &= ~(DOCK_UNDOCKING); } +static void dock_lock(struct dock_station *ds, int lock) +{ + struct acpi_object_list arg_list; + union acpi_object arg; + acpi_status status; + + arg_list.count = 1; + arg_list.pointer = &arg; + arg.type = ACPI_TYPE_INTEGER; + arg.integer.value = !!lock; + status = acpi_evaluate_object(ds->handle, "_LCK", &arg_list, NULL); + if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) { + if (lock) + printk(KERN_WARNING PREFIX "Locking device failed\n"); + else + printk(KERN_WARNING PREFIX "Unlocking device failed\n"); + } +} + /** * dock_in_progress - see if we are in the middle of handling a dock event * @ds: the dock station @@ -577,6 +596,7 @@ static int handle_eject_request(struct dock_station *ds, u32 event) hotplug_dock_devices(ds, ACPI_NOTIFY_EJECT_REQUEST); undock(ds); + dock_lock(ds, 0); eject_dock(ds); if (dock_present(ds)) { printk(KERN_ERR PREFIX "Unable to undock!\n"); @@ -617,6 +637,7 @@ static void dock_notify(acpi_handle handle, u32 event, void *data) hotplug_dock_devices(ds, event); complete_dock(ds); dock_event(ds, event, DOCK_EVENT); + dock_lock(ds, 1); } break; case ACPI_NOTIFY_DEVICE_CHECK: |