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Commit 91d02132 authored by Bob Moore's avatar Bob Moore Committed by Len Brown
Browse files

ACPICA: Fix for package reference counts 



Prevents infinite loop of 'Large Reference Count' messages in
aslts-bdemo-b286 test.

Signed-off-by: default avatarBob Moore <robert.moore@intel.com>
Signed-off-by: default avatarAlexey Starikovskiy <astarikovskiy@suse.de>
Signed-off-by: default avatarLen Brown <len.brown@intel.com>
parent 422f4f90

drivers/acpi/dispatcher/dsobject.c

+22 −0
Original line number Diff line number Diff line
@@ -370,6 +370,8 @@ acpi_ds_build_internal_package_obj(struct acpi_walk_state *walk_state, 
	union acpi_operand_object *obj_desc = NULL;

	acpi_status status = AE_OK;

	acpi_native_uint i;

	u16 index;

	u16 reference_count;



	ACPI_FUNCTION_TRACE(ds_build_internal_package_obj);
@@ -447,6 +449,26 @@ acpi_ds_build_internal_package_obj(struct acpi_walk_state *walk_state, 
							       package.

							       elements[i]);

		}



		if (*obj_desc_ptr) {



			/* Existing package, get existing reference count */



			reference_count =

			    (*obj_desc_ptr)->common.reference_count;

			if (reference_count > 1) {



				/* Make new element ref count match original ref count */



				for (index = 0; index < (reference_count - 1);

				     index++) {

					acpi_ut_add_reference((obj_desc->

							       package.

							       elements[i]));

				}

			}

		}



		arg = arg->common.next;

	}