ACPI: EC: Allow multibyte access to EC
http://bugzilla.kernel.org/show_bug.cgi?id=14667
Signed-off-by: Alexey Starikovskiy <astarikovskiy@suse.de>
Signed-off-by: Len Brown <len.brown@intel.com>
diff --git a/drivers/acpi/acpica/exprep.c b/drivers/acpi/acpica/exprep.c
index edf62bf..a610ebe 100644
--- a/drivers/acpi/acpica/exprep.c
+++ b/drivers/acpi/acpica/exprep.c
@@ -468,6 +468,18 @@
acpi_ut_add_reference(obj_desc->field.region_obj);
+ /* 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);
+ obj_desc->common_field.access_byte_width =
+ ACPI_DIV_8(obj_desc->common_field.
+ access_bit_width);
+ }
+
ACPI_DEBUG_PRINT((ACPI_DB_BFIELD,
"RegionField: BitOff %X, Off %X, Gran %X, Region %p\n",
obj_desc->field.start_field_bit_offset,