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path: root/drivers/acpi/acpica/exprep.c
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Diffstat (limited to 'drivers/acpi/acpica/exprep.c')
-rw-r--r--drivers/acpi/acpica/exprep.c17
1 files changed, 11 insertions, 6 deletions
diff --git a/drivers/acpi/acpica/exprep.c b/drivers/acpi/acpica/exprep.c
index a610ebe18edd..2fbfe51fb141 100644
--- a/drivers/acpi/acpica/exprep.c
+++ b/drivers/acpi/acpica/exprep.c
@@ -471,13 +471,18 @@ acpi_status acpi_ex_prep_field_value(struct acpi_create_field_info *info)
471 /* allow full data read from EC address space */ 471 /* allow full data read from EC address space */
472 if (obj_desc->field.region_obj->region.space_id == 472 if (obj_desc->field.region_obj->region.space_id ==
473 ACPI_ADR_SPACE_EC) { 473 ACPI_ADR_SPACE_EC) {
474 if (obj_desc->common_field.bit_length > 8) 474 if (obj_desc->common_field.bit_length > 8) {
475 obj_desc->common_field.access_bit_width = 475 unsigned width =
476 ACPI_ROUND_UP(obj_desc->common_field. 476 ACPI_ROUND_BITS_UP_TO_BYTES(
477 bit_length, 8); 477 obj_desc->common_field.bit_length);
478 // access_bit_width is u8, don't overflow it
479 if (width > 8)
480 width = 8;
478 obj_desc->common_field.access_byte_width = 481 obj_desc->common_field.access_byte_width =
479 ACPI_DIV_8(obj_desc->common_field. 482 width;
480 access_bit_width); 483 obj_desc->common_field.access_bit_width =
484 8 * width;
485 }
481 } 486 }
482 487
483 ACPI_DEBUG_PRINT((ACPI_DB_BFIELD, 488 ACPI_DEBUG_PRINT((ACPI_DB_BFIELD,