1 files changed, 12 insertions, 5 deletions

diff --git a/drivers/acpi/executer/exconfig.c b/drivers/acpi/executer/exconfig.c
index 9c46f3338640..9ae3cb55979b 100644
--- a/drivers/acpi/executer/exconfig.c
+++ b/drivers/acpi/executer/exconfig.c
@@ -298,6 +298,7 @@ acpi_ex_load_op(union acpi_operand_object *obj_desc,
         struct acpi_table_header *table_ptr = NULL;
         acpi_physical_address address;
         struct acpi_table_header table_header;
+        acpi_integer temp;
         u32 i;
 
         ACPI_FUNCTION_TRACE(ex_load_op);
@@ -326,7 +327,7 @@ acpi_ex_load_op(union acpi_operand_object *obj_desc,
 
                 address = obj_desc->region.address;
 
-                /* Get the table length from the table header */
+                /* Get part of the table header to get the table length */
 
                 table_header.length = 0;
                 for (i = 0; i < 8; i++) {
@@ -334,11 +335,14 @@ acpi_ex_load_op(union acpi_operand_object *obj_desc,
                             acpi_ev_address_space_dispatch(obj_desc, ACPI_READ,
                                                            (acpi_physical_address)
                                                            (i + address), 8,
-                                                           ((u8 *) &
-                                                            table_header) + i);
+                                                           &temp);
                         if (ACPI_FAILURE(status)) {
                                 return_ACPI_STATUS(status);
                         }
+
+                        /* Get the one valid byte of the returned 64-bit value */
+
+                        ACPI_CAST_PTR(u8, &table_header)[i] = (u8) temp;
                 }
 
                 /* Sanity check the table length */
@@ -361,11 +365,14 @@ acpi_ex_load_op(union acpi_operand_object *obj_desc,
                             acpi_ev_address_space_dispatch(obj_desc, ACPI_READ,
                                                            (acpi_physical_address)
                                                            (i + address), 8,
-                                                           ((u8 *) table_ptr +
-                                                            i));
+                                                           &temp);
                         if (ACPI_FAILURE(status)) {
                                 goto cleanup;
                         }
+
+                        /* Get the one valid byte of the returned 64-bit value */
+
+                        ACPI_CAST_PTR(u8, table_ptr)[i] = (u8) temp;
                 }
                 break;