diff options
| author | Len Brown <len.brown@intel.com> | 2010-04-16 16:08:07 -0400 |
|---|---|---|
| committer | Len Brown <len.brown@intel.com> | 2010-04-16 16:08:07 -0400 |
| commit | bc3966921ff9528ae44a4a108085ab06107c1e7d (patch) | |
| tree | 4bcc60e2b560a1faa636b1f4588b2e673b6a2268 | |
| parent | dc57da3875f527b1cc195ea4ce5bd32e1e68433d (diff) | |
| parent | 2060c44576c79086ff24718878d7edaa7384a985 (diff) | |
Merge branch 'bugzilla-15749' into release
| -rw-r--r-- | drivers/acpi/acpica/exprep.c | 17 |
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) /* 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, |