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Merge branch 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6 

* 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6:
  ACPI: EC: Limit burst to 64 bits
This commit is contained in:
Linus Torvalds 2010-04-17 10:58:38 -07:00
parent 65832940eb bc3966921f
commit d6f533c8c7
1 changed files with 11 additions and 6 deletions
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17
drivers/acpi/acpica/exprep.c
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@ -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,