ACPI / scan: Apply default enumeration to devices with ACPI drivers
authorRafael J. Wysocki <>
Sun, 16 Apr 2017 23:19:50 +0000 (01:19 +0200)
committerRafael J. Wysocki <>
Wed, 19 Apr 2017 20:56:44 +0000 (22:56 +0200)
The current code in acpi_bus_attach() is inconsistent with respect
to device objects with ACPI drivers bound to them, as it allows
ACPI drivers to bind to device objects with existing "physical"
device companions, but it doesn't allow "physical" device objects
to be created for ACPI device objects with ACPI drivers bound to
them.  Thus, in some cases, the outcome depends on the ordering
of events which is confusing at best.

For this reason, modify acpi_bus_attach() to call
acpi_default_enumeration() for device objects with the
pnp.type.platform_id flag set regardless of whether or not
any ACPI drivers are bound to them.

Signed-off-by: Rafael J. Wysocki <>
Reviewed-by: Mika Westerberg <>
Reviewed-by: Joey Lee <>

index acfa6c0831f252268ca0f6563109774ecc87fdc7..f74bc0d286923edfbe2e9c046f774fc955a1bee9 100644 (file)
@@ -1856,10 +1856,10 @@ static void acpi_bus_attach(struct acpi_device *device)
        if (ret < 0)
-       if (ret > 0 || !device->pnp.type.platform_id)
-               acpi_device_set_enumerated(device);
-       else
+       if (device->pnp.type.platform_id)
+       else
+               acpi_device_set_enumerated(device);
        list_for_each_entry(child, &device->children, node)