1 files changed, 6 insertions, 2 deletions

diff --git a/drivers/acpi/executer/exfldio.c b/drivers/acpi/executer/exfldio.c
index 3b7c4352ec57..051053f7cccb 100644
--- a/drivers/acpi/executer/exfldio.c
+++ b/drivers/acpi/executer/exfldio.c
@@ -785,6 +785,7 @@ acpi_ex_insert_into_field(union acpi_operand_object *obj_desc,
 {
         acpi_status status;
         acpi_integer mask;
+        acpi_integer width_mask;
         acpi_integer merged_datum;
         acpi_integer raw_datum = 0;
         u32 field_offset = 0;
@@ -809,8 +810,11 @@ acpi_ex_insert_into_field(union acpi_operand_object *obj_desc,
 
         /* Compute the number of datums (access width data items) */
 
+        width_mask =
+            ACPI_MASK_BITS_ABOVE(obj_desc->common_field.access_bit_width);
         mask =
-            ACPI_MASK_BITS_BELOW(obj_desc->common_field.start_field_bit_offset);
+            width_mask & ACPI_MASK_BITS_BELOW(obj_desc->common_field.
+                                              start_field_bit_offset);
 
         datum_count = ACPI_ROUND_UP_TO(obj_desc->common_field.bit_length,
                                        obj_desc->common_field.access_bit_width);
@@ -850,7 +854,7 @@ acpi_ex_insert_into_field(union acpi_operand_object *obj_desc,
                 merged_datum = raw_datum >>
                     (obj_desc->common_field.access_bit_width -
                      obj_desc->common_field.start_field_bit_offset);
-                mask = ACPI_INTEGER_MAX;
+                mask = width_mask;
 
                 if (i == datum_count) {
                         break;