[kernel/f13/master] - linux-2.6-acpi-fix-alias.patch: fix ACPI object aliasing (#608648)

[Matthew Garrett]

commit 786d4607590e58b3544ca59f82cb9b83ff07e7bb
Author: Matthew Garrett <mjg at redhat.com>
Date:   Wed Feb 9 12:12:47 2011 -0500

    - linux-2.6-acpi-fix-alias.patch: fix ACPI object aliasing (#608648)

 kernel.spec                    |    6 +++++-
 linux-2.6-acpi-fix-alias.patch |   33 +++++++++++++++++++++++++++++++++
 2 files changed, 38 insertions(+), 1 deletions(-)
---
diff --git a/kernel.spec b/kernel.spec
index 6fb1c8b..e197392 100644
--- a/kernel.spec
+++ b/kernel.spec
@@ -648,6 +648,7 @@ Patch390: linux-2.6-defaults-acpi-video.patch
 Patch391: linux-2.6-acpi-video-dos.patch
 Patch392: linux-2.6-acpi-video-export-edid.patch
 Patch393: acpi-ec-add-delay-before-write.patch
+Patch394: linux-2.6-acpi-fix-alias.patch
 
 Patch450: linux-2.6-input-kill-stupid-messages.patch
 Patch452: linux-2.6.30-no-pcspkr-modalias.patch
@@ -1366,6 +1367,7 @@ ApplyPatch linux-2.6-defaults-acpi-video.patch
 ApplyPatch linux-2.6-acpi-video-dos.patch
 ApplyPatch linux-2.6-acpi-video-export-edid.patch
 ApplyPatch acpi-ec-add-delay-before-write.patch
+ApplyPatch linux-2.6-acpi-fix-alias.patch
 
 # Various low-impact patches to aid debugging.
 ApplyPatch linux-2.6-debug-sizeof-structs.patch
@@ -2301,8 +2303,10 @@ fi
 %kernel_variant_files %{with_pae} PAE
 %kernel_variant_files %{with_pae_debug} PAEdebug
 
-
 %changelog
+* Wed Feb 09 2011 Matthew Garrett <mjg at redhat.com>
+- linux-2.6-acpi-fix-alias.patch: fix ACPI object aliasing (#608648)
+
 * Sat Feb 05 2011 Chuck Ebbert <cebbert at redhat.com>
 - Linux 2.6.34.8
 - Drop merged patches:
diff --git a/linux-2.6-acpi-fix-alias.patch b/linux-2.6-acpi-fix-alias.patch
new file mode 100644
index 0000000..bd29568
--- /dev/null
+++ b/linux-2.6-acpi-fix-alias.patch
@@ -0,0 +1,33 @@
+diff -up linux-2.6.34.x86_64/drivers/acpi/acpica/dsobject.c.mjg59 linux-2.6.34.x86_64/drivers/acpi/acpica/dsobject.c
+--- linux-2.6.34.x86_64/drivers/acpi/acpica/dsobject.c.mjg59	2010-05-16 17:17:36.000000000 -0400
++++ linux-2.6.34.x86_64/drivers/acpi/acpica/dsobject.c	2011-02-09 12:08:58.430275518 -0500
+@@ -81,6 +81,7 @@ acpi_ds_build_internal_object(struct acp
+ {
+ 	union acpi_operand_object *obj_desc;
+ 	acpi_status status;
++	acpi_object_type type;
+ 
+ 	ACPI_FUNCTION_TRACE(ds_build_internal_object);
+ 
+@@ -172,7 +173,20 @@ acpi_ds_build_internal_object(struct acp
+ 				return_ACPI_STATUS(status);
+ 			}
+ 
+-			switch (op->common.node->type) {
++			/*
++			 * Special handling for Alias objects. We need to setup the type
++			 * and the Op->Common.Node to point to the Alias target. Note,
++			 * Alias has at most one level of indirection internally.
++			 */
++			type = op->common.node->type;
++			if (type == ACPI_TYPE_LOCAL_ALIAS) {
++				type = obj_desc->common.type;
++				op->common.node =
++				    ACPI_CAST_PTR(struct acpi_namespace_node,
++						  op->common.node->object);
++			}
++
++			switch (type) {
+ 				/*
+ 				 * For these types, we need the actual node, not the subobject.
+ 				 * However, the subobject did not get an extra reference count above.