diff options
author | Ingo Molnar <mingo@elte.hu> | 2010-05-07 11:27:54 +0200 |
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committer | Ingo Molnar <mingo@elte.hu> | 2010-05-07 11:27:54 +0200 |
commit | 48652ced1533c3372f996a0d83b6e73b1f1c9381 (patch) | |
tree | 5e17729cfcdc97bf798a17b57cdb888b4ded65b0 /drivers/acpi/acpica | |
parent | 99bd5e2f245d8cd17d040c82d40becdb3efd9b69 (diff) | |
parent | 66f41d4c5c8a5deed66fdcc84509376c9a0bf9d8 (diff) |
Merge commit 'v2.6.34-rc6' into sched/core
Diffstat (limited to 'drivers/acpi/acpica')
-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, |