Merge branch 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6

* 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6: (119 commits)
  ACPI: don't pass handle for fixed hardware notifications
  ACPI: remove null pointer checks in deferred execution path
  ACPI: simplify deferred execution path
  acerhdf: additional BIOS versions
  acerhdf: convert to dev_pm_ops
  acerhdf: fix fan control for AOA150 model
  thermal: add missing Kconfig dependency
  acpi: switch /proc/acpi/{debug_layer,debug_level} to seq_file
  hp-wmi: fix rfkill memory leak on unload
  ACPI: remove unnecessary #ifdef CONFIG_DMI
  ACPI: linux/acpi.h should not include linux/dmi.h
  hwmon driver for ACPI 4.0 power meters
  topstar-laptop: add new driver for hotkeys support on Topstar N01
  thinkpad_acpi: fix rfkill memory leak on unload
  thinkpad-acpi: report brightness events when required
  thinkpad-acpi: don't poll by default any of the reserved hotkeys
  thinkpad-acpi: Fix procfs hotkey reset command
  thinkpad-acpi: deprecate hotkey_bios_mask
  thinkpad-acpi: hotkey poll fixes
  thinkpad-acpi: be more strict when detecting a ThinkPad
  ...

1 files changed, 18 insertions, 5 deletions

diff --git a/drivers/acpi/acpica/dsobject.c b/drivers/acpi/acpica/dsobject.c
index 02e6caad4a76..507e1f0bbdfd 100644
--- a/drivers/acpi/acpica/dsobject.c
+++ b/drivers/acpi/acpica/dsobject.c
@@ -482,14 +482,27 @@ acpi_ds_build_internal_package_obj(struct acpi_walk_state *walk_state,
 	if (arg) {
 		/*
 		 * num_elements was exhausted, but there are remaining elements in the
-		 * package_list.
+		 * package_list. Truncate the package to num_elements.
 		 *
 		 * Note: technically, this is an error, from ACPI spec: "It is an error
 		 * for NumElements to be less than the number of elements in the
-		 * PackageList". However, for now, we just print an error message and
-		 * no exception is returned.
+		 * PackageList". However, we just print an error message and
+		 * no exception is returned. This provides Windows compatibility. Some
+		 * BIOSs will alter the num_elements on the fly, creating this type
+		 * of ill-formed package object.
 		 */
 		while (arg) {
+			/*
+			 * We must delete any package elements that were created earlier
+			 * and are not going to be used because of the package truncation.
+			 */
+			if (arg->common.node) {
+				acpi_ut_remove_reference(ACPI_CAST_PTR
+							 (union
+							  acpi_operand_object,
+							  arg->common.node));
+				arg->common.node = NULL;
+			}
 
 			/* Find out how many elements there really are */
 
@@ -498,7 +511,7 @@ acpi_ds_build_internal_package_obj(struct acpi_walk_state *walk_state,
 		}
 
 		ACPI_WARNING((AE_INFO,
-			    "Package List length (%X) larger than NumElements count (%X), truncated\n",
+			    "Package List length (0x%X) larger than NumElements count (0x%X), truncated\n",
 			    i, element_count));
 	} else if (i < element_count) {
 		/*
@@ -506,7 +519,7 @@ acpi_ds_build_internal_package_obj(struct acpi_walk_state *walk_state,
 		 * Note: this is not an error, the package is padded out with NULLs.
 		 */
 		ACPI_DEBUG_PRINT((ACPI_DB_INFO,
-				  "Package List length (%X) smaller than NumElements count (%X), padded with null elements\n",
+				  "Package List length (0x%X) smaller than NumElements count (0x%X), padded with null elements\n",
 				  i, element_count));
 	}