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Commit 33a1d461 authored by Bob Moore's avatar Bob Moore Committed by Len Brown
Browse files

ACPICA: Change behavior of object copy for mutex/event objects 



When copying these internal objects, cannot simply copy the
underlying OS object. A new OS object must be created.

Signed-off-by: default avatarBob Moore <robert.moore@intel.com>
Signed-off-by: default avatarLin Ming <ming.m.lin@intel.com>
Signed-off-by: default avatarLen Brown <len.brown@intel.com>
parent 8eb7b247

drivers/acpi/acpica/utcopy.c

+23 −0
Original line number Diff line number Diff line
@@ -676,6 +676,7 @@ acpi_ut_copy_simple_object(union acpi_operand_object *source_desc, 
{

	u16 reference_count;

	union acpi_operand_object *next_object;

	acpi_status status;



	/* Save fields from destination that we don't want to overwrite */
@@ -768,6 +769,28 @@ acpi_ut_copy_simple_object(union acpi_operand_object *source_desc, 
		}

		break;



		/*

		 * For Mutex and Event objects, we cannot simply copy the underlying

		 * OS object. We must create a new one.

		 */

	case ACPI_TYPE_MUTEX:



		status = acpi_os_create_mutex(&dest_desc->mutex.os_mutex);

		if (ACPI_FAILURE(status)) {

			return status;

		}

		break;



	case ACPI_TYPE_EVENT:



		status = acpi_os_create_semaphore(ACPI_NO_UNIT_LIMIT, 0,

						  &dest_desc->event.

						  os_semaphore);

		if (ACPI_FAILURE(status)) {

			return status;

		}

		break;



	default:

		/* Nothing to do for other simple objects */

		break;