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ACPI / property: Fix subnode lookup scope for data-only subnodes 

The correct scope for looking up the objects to generate data packages for
data-only subnodes pointed to by another data-only subnode is the scope
of the parent of that subnode and not the scope containing the _DSD object
at the top of the hierarchy (the latter works only if all of the objects
returning data-only subnode packages in a given hierarchy are in the same
scope).

Fix the code to work as expected.

Fixes: 445b0eb058 (ACPI / property: Add support for data-only subnodes)
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Tested-by: Mika Westerberg <mika.westerberg@linux.intel.com>
This commit is contained in:
Rafael J. Wysocki 2015-10-20 18:32:27 +02:00
parent 3f4232ee8b
commit 205ad97fc5
1 changed files with 8 additions and 1 deletions
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9
drivers/acpi/property.c
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@ -71,7 +71,14 @@ static bool acpi_nondev_subnode_ok(acpi_handle scope,
if (acpi_extract_properties(buf.pointer, &dn->data))
dn->handle = handle;
if (acpi_enumerate_nondev_subnodes(scope, buf.pointer, &dn->data))
/*
* The scope for the subnode object lookup is the one of the namespace
* node (device) containing the object that has returned the package.
* That is, it's the scope of that object's parent.
*/
status = acpi_get_parent(handle, &scope);
if (ACPI_SUCCESS(status)
&& acpi_enumerate_nondev_subnodes(scope, buf.pointer, &dn->data))
dn->handle = handle;
if (dn->handle) {