Merge branch 'bugzilla-15749' into release
diff --git a/drivers/acpi/acpica/exprep.c b/drivers/acpi/acpica/exprep.c
index a610ebe..2fbfe51 100644
--- a/drivers/acpi/acpica/exprep.c
+++ b/drivers/acpi/acpica/exprep.c
@@ -471,13 +471,18 @@
/* allow full data read from EC address space */
if (obj_desc->field.region_obj->region.space_id ==
ACPI_ADR_SPACE_EC) {
- if (obj_desc->common_field.bit_length > 8)
- obj_desc->common_field.access_bit_width =
- ACPI_ROUND_UP(obj_desc->common_field.
- bit_length, 8);
+ if (obj_desc->common_field.bit_length > 8) {
+ unsigned width =
+ ACPI_ROUND_BITS_UP_TO_BYTES(
+ obj_desc->common_field.bit_length);
+ // access_bit_width is u8, don't overflow it
+ if (width > 8)
+ width = 8;
obj_desc->common_field.access_byte_width =
- ACPI_DIV_8(obj_desc->common_field.
- access_bit_width);
+ width;
+ obj_desc->common_field.access_bit_width =
+ 8 * width;
+ }
}
ACPI_DEBUG_PRINT((ACPI_DB_BFIELD,