1 files changed, 5 insertions, 4 deletions

diff --git a/drivers/acpi/executer/exfldio.c b/drivers/acpi/executer/exfldio.c
index e336b5dc7a50..9ff9d1f4615d 100644
--- a/drivers/acpi/executer/exfldio.c
+++ b/drivers/acpi/executer/exfldio.c
@@ -153,14 +153,15 @@ acpi_ex_setup_region(union acpi_operand_object *obj_desc,
                         /*
                          * Slack mode only:  We will go ahead and allow access to this
                          * field if it is within the region length rounded up to the next
-                         * access width boundary.
+                         * access width boundary. acpi_size cast for 64-bit compile.
                          */
                         if (ACPI_ROUND_UP(rgn_desc->region.length,
                                           obj_desc->common_field.
                                           access_byte_width) >=
-                            (obj_desc->common_field.base_byte_offset +
-                             (acpi_native_uint) obj_desc->common_field.
-                             access_byte_width + field_datum_byte_offset)) {
+                            ((acpi_size) obj_desc->common_field.
+                             base_byte_offset +
+                             obj_desc->common_field.access_byte_width +
+                             field_datum_byte_offset)) {
                                 return_ACPI_STATUS(AE_OK);
                         }
                 }