This is a note to let you know that I've just added the patch titled
ACPICA: Interpreter: Fix Store() when implicit conversion is not possible.
to the 3.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
acpica-interpreter-fix-store-when-implicit-conversion-is-not-possible.patch
and it can be found in the queue-3.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 3f654bad3257427bea7ba1c4d43a23d99a03622b Mon Sep 17 00:00:00 2001
From: Bob Moore <robert.moore@xxxxxxxxx>
Date: Mon, 31 Dec 2012 00:11:45 +0000
Subject: ACPICA: Interpreter: Fix Store() when implicit conversion is not possible.
From: Bob Moore <robert.moore@xxxxxxxxx>
commit 3f654bad3257427bea7ba1c4d43a23d99a03622b upstream.
For the cases such as a store of a string to an existing package
object, implement the store as a CopyObject().
This is a small departure from the ACPI specification which states
that the control method should be aborted in this case. However,
ASLTS suite depends on this behavior.
Signed-off-by: Bob Moore <robert.moore@xxxxxxxxx>
Signed-off-by: Lv Zheng <lv.zheng@xxxxxxxxx>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/acpi/acpica/exstore.c | 29 ++++++++++++++++++++++++-----
1 file changed, 24 insertions(+), 5 deletions(-)
--- a/drivers/acpi/acpica/exstore.c
+++ b/drivers/acpi/acpica/exstore.c
@@ -487,14 +487,33 @@ acpi_ex_store_object_to_node(union acpi_
default:
ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
- "Storing %s (%p) directly into node (%p) with no implicit conversion\n",
+ "Storing [%s] (%p) directly into node [%s] (%p)"
+ " with no implicit conversion\n",
acpi_ut_get_object_type_name(source_desc),
- source_desc, node));
+ source_desc,
+ acpi_ut_get_object_type_name(target_desc),
+ node));
- /* No conversions for all other types. Just attach the source object */
+ /*
+ * No conversions for all other types. Directly store a copy of
+ * the source object. NOTE: This is a departure from the ACPI
+ * spec, which states "If conversion is impossible, abort the
+ * running control method".
+ *
+ * This code implements "If conversion is impossible, treat the
+ * Store operation as a CopyObject".
+ */
+ status =
+ acpi_ut_copy_iobject_to_iobject(source_desc, &new_desc,
+ walk_state);
+ if (ACPI_FAILURE(status)) {
+ return_ACPI_STATUS(status);
+ }
- status = acpi_ns_attach_object(node, source_desc,
- source_desc->common.type);
+ status =
+ acpi_ns_attach_object(node, new_desc,
+ new_desc->common.type);
+ acpi_ut_remove_reference(new_desc);
break;
}
Patches currently in stable-queue which might be from robert.moore@xxxxxxxxx are
queue-3.4/acpica-fix-for-a-store-argx-when-argx-contains-a-reference-to-a-field.patch
queue-3.4/acpica-derefof-operator-update-to-fully-resolve-fieldunit-and-bufferfield-refs.patch
queue-3.4/acpica-return-error-if-derefof-resolves-to-a-null-package-element.patch
queue-3.4/acpica-interpreter-fix-store-when-implicit-conversion-is-not-possible.patch
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