6 files changed, 69 insertions, 3 deletions
diff --git a/drivers/acpi/acpica/acutils.h b/drivers/acpi/acpica/acutils.h
index bccae0d3db75..59d6ded01614 100644
--- a/drivers/acpi/acpica/acutils.h
+++ b/drivers/acpi/acpica/acutils.h
@@ -737,6 +737,8 @@ const char *acpi_ah_match_uuid(u8 *data);
  */
 #if (defined ACPI_ASL_COMPILER || defined ACPI_EXEC_APP || defined ACPI_HELP_APP)
 void acpi_ut_convert_string_to_uuid(char *in_string, u8 *uuid_buffer);
+
+acpi_status acpi_ut_convert_uuid_to_string(char *uuid_buffer, char *out_string);
 #endif
 
 #endif				/* _ACUTILS_H */
diff --git a/drivers/acpi/acpica/exfield.c b/drivers/acpi/acpica/exfield.c
index 32f03ee81785..06f3c9df1e22 100644
--- a/drivers/acpi/acpica/exfield.c
+++ b/drivers/acpi/acpica/exfield.c
@@ -139,7 +139,9 @@ acpi_ex_read_data_from_field(struct acpi_walk_state *walk_state,
 		    || obj_desc->field.region_obj->region.space_id ==
 		    ACPI_ADR_SPACE_GSBUS
 		    || obj_desc->field.region_obj->region.space_id ==
-		    ACPI_ADR_SPACE_IPMI)) {
+		    ACPI_ADR_SPACE_IPMI
+		    || obj_desc->field.region_obj->region.space_id ==
+		    ACPI_ADR_SPACE_PLATFORM_RT)) {
 
 		/* SMBus, GSBus, IPMI serial */
 
@@ -301,7 +303,9 @@ acpi_ex_write_data_to_field(union acpi_operand_object *source_desc,
 		    || obj_desc->field.region_obj->region.space_id ==
 		    ACPI_ADR_SPACE_GSBUS
 		    || obj_desc->field.region_obj->region.space_id ==
-		    ACPI_ADR_SPACE_IPMI)) {
+		    ACPI_ADR_SPACE_IPMI
+		    || obj_desc->field.region_obj->region.space_id ==
+		    ACPI_ADR_SPACE_PLATFORM_RT)) {
 
 		/* SMBus, GSBus, IPMI serial */
 
diff --git a/drivers/acpi/acpica/exserial.c b/drivers/acpi/acpica/exserial.c
index 8e8d95f7947b..10d68a5f76a3 100644
--- a/drivers/acpi/acpica/exserial.c
+++ b/drivers/acpi/acpica/exserial.c
@@ -195,6 +195,12 @@ acpi_ex_read_serial_bus(union acpi_operand_object *obj_desc,
 		function = ACPI_READ | (accessor_type << 16);
 		break;
 
+	case ACPI_ADR_SPACE_PLATFORM_RT:
+
+		buffer_length = ACPI_PRM_INPUT_BUFFER_SIZE;
+		function = ACPI_READ;
+		break;
+
 	default:
 		return_ACPI_STATUS(AE_AML_INVALID_SPACE_ID);
 	}
@@ -311,6 +317,12 @@ acpi_ex_write_serial_bus(union acpi_operand_object *source_desc,
 		function = ACPI_WRITE | (accessor_type << 16);
 		break;
 
+	case ACPI_ADR_SPACE_PLATFORM_RT:
+
+		buffer_length = ACPI_PRM_INPUT_BUFFER_SIZE;
+		function = ACPI_WRITE;
+		break;
+
 	default:
 		return_ACPI_STATUS(AE_AML_INVALID_SPACE_ID);
 	}
diff --git a/drivers/acpi/acpica/nsrepair2.c b/drivers/acpi/acpica/nsrepair2.c
index 14b71b41e845..38e10ab976e6 100644
--- a/drivers/acpi/acpica/nsrepair2.c
+++ b/drivers/acpi/acpica/nsrepair2.c
@@ -379,6 +379,13 @@ acpi_ns_repair_CID(struct acpi_evaluate_info *info,
 
 			(*element_ptr)->common.reference_count =
 			    original_ref_count;
+
+			/*
+			 * The original_element holds a reference from the package object
+			 * that represents _HID. Since a new element was created by _HID,
+			 * remove the reference from the _CID package.
+			 */
+			acpi_ut_remove_reference(original_element);
 		}
 
 		element_ptr++;
diff --git a/drivers/acpi/acpica/utprint.c b/drivers/acpi/acpica/utprint.c
index e37d612e8db5..05426596d1f4 100644
--- a/drivers/acpi/acpica/utprint.c
+++ b/drivers/acpi/acpica/utprint.c
@@ -475,7 +475,7 @@ int vsnprintf(char *string, acpi_size size, const char *format, va_list args)
 		case 'X':
 
 			type |= ACPI_FORMAT_UPPER;
-			/* FALLTHROUGH */
+			ACPI_FALLTHROUGH;
 
 		case 'x':
 
diff --git a/drivers/acpi/acpica/utuuid.c b/drivers/acpi/acpica/utuuid.c
index 090e44b6b6c7..dca9061518ab 100644
--- a/drivers/acpi/acpica/utuuid.c
+++ b/drivers/acpi/acpica/utuuid.c
@@ -61,4 +61,45 @@ void acpi_ut_convert_string_to_uuid(char *in_string, u8 *uuid_buffer)
 					       1]);
 	}
 }
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ut_convert_uuid_to_string
+ *
+ * PARAMETERS:  uuid_buffer         - 16-byte UUID buffer
+ *              out_string          - 36-byte formatted UUID string
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Convert 16-byte UUID buffer to 36-byte formatted UUID string
+ *              out_string must be 37 bytes to include null terminator.
+ *
+ ******************************************************************************/
+
+acpi_status acpi_ut_convert_uuid_to_string(char *uuid_buffer, char *out_string)
+{
+	u32 i;
+
+	if (!uuid_buffer || !out_string) {
+		return (AE_BAD_PARAMETER);
+	}
+
+	for (i = 0; i < UUID_BUFFER_LENGTH; i++) {
+		out_string[acpi_gbl_map_to_uuid_offset[i]] =
+		    acpi_ut_hex_to_ascii_char(uuid_buffer[i], 4);
+
+		out_string[acpi_gbl_map_to_uuid_offset[i] + 1] =
+		    acpi_ut_hex_to_ascii_char(uuid_buffer[i], 0);
+	}
+
+	/* Insert required hyphens (dashes) */
+
+	out_string[UUID_HYPHEN1_OFFSET] =
+	    out_string[UUID_HYPHEN2_OFFSET] =
+	    out_string[UUID_HYPHEN3_OFFSET] =
+	    out_string[UUID_HYPHEN4_OFFSET] = '-';
+
+	out_string[UUID_STRING_LENGTH] = 0;	/* Null terminate */
+	return (AE_OK);
+}
 #endif