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authorRafael J. Wysocki <rafael.j.wysocki@intel.com>2014-02-16 04:51:01 +0400
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2014-02-16 04:51:01 +0400
commit1e2380cd144f6a9619f72f80ad9a93268f63b8dc (patch)
tree03f661af52c942b0d1c7523c1bd05af59b610671 /drivers/acpi/container.c
parentd6a40224a30687f6e0471c4476e3a1a9adc28a96 (diff)
downloadlinux-1e2380cd144f6a9619f72f80ad9a93268f63b8dc.tar.xz
ACPI / dock: Dispatch dock notifications from the global notify handler
The ACPI dock station code carries out an extra namespace scan before the main one in order to find and register all of the dock device objects. Then, it registers a notify handler for each of them for handling dock events. However, dock device objects need not be scanned for upfront. They very well can be enumerated and registered during the first phase of the main namespace scan, before attaching scan handlers and ACPI drivers to ACPI device objects. Then, the dependent devices can be added to the in the second phase. That makes it possible to drop the extra namespace scan, so do it. Moreover, it is not necessary to register notify handlers for all of the dock stations' namespace nodes, becuase notifications may be dispatched from the global notify handler for them. Do that and drop two functions used for dock notify handling, acpi_dock_deferred_cb() and dock_notify_handler(), that aren't necessary any more. Finally, some dock station objects have _HID objects matching the ACPI container scan handler which causes it to claim those objects and try to handle their hotplug, but that is not a good idea, because those objects have their own special hotplug handling anyway. For this reason, the hotplug_notify flag should not be set for ACPI device objects representing dock stations and the container scan handler should be made ignore those objects, so make that happen. Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'drivers/acpi/container.c')
-rw-r--r--drivers/acpi/container.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/acpi/container.c b/drivers/acpi/container.c
index 0b6ae6eb5c4a..9c35765ac5e9 100644
--- a/drivers/acpi/container.c
+++ b/drivers/acpi/container.c
@@ -68,6 +68,9 @@ static int container_device_attach(struct acpi_device *adev,
struct device *dev;
int ret;
+ if (adev->flags.is_dock_station)
+ return 0;
+
cdev = kzalloc(sizeof(*cdev), GFP_KERNEL);
if (!cdev)
return -ENOMEM;