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| author | Lin Ming <ming.m.lin@intel.com> | 2008-04-10 19:06:43 +0400 |
|---|---|---|
| committer | Len Brown <len.brown@intel.com> | 2008-04-22 14:29:31 -0400 |
| commit | a3df4dadd446c0d7195f2bbe86dd5174426d8090 (patch) | |
| tree | f88267fb60e64c5c178ff16568148f45b9326546 /drivers/acpi | |
| parent | 1d5b285da1893b90507b081664ac27f1a8a3dc5b (diff) | |
| download | linux-a3df4dadd446c0d7195f2bbe86dd5174426d8090.tar.gz linux-a3df4dadd446c0d7195f2bbe86dd5174426d8090.tar.bz2 linux-a3df4dadd446c0d7195f2bbe86dd5174426d8090.zip | |
ACPICA: Update behavior of CopyObject to match ACPI spec
Fixed a problem where a CopyObject to RegionField, BankField, and
IndexField objects did not perform an implicit conversion as it
should. These types must retain their initial type permanently as
per the ACPI specification. However, a CopyObject to all other
object types should not perform an implicit conversion, as per
the ACPI specification.
http://www.acpica.org/bugzilla/show_bug.cgi?id=388
Signed-off-by: Lin Ming <ming.m.lin@intel.com>
Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Alexey Starikovskiy <astarikovskiy@suse.de>
Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'drivers/acpi')
| -rw-r--r-- | drivers/acpi/executer/exstore.c | 15 |
1 files changed, 11 insertions, 4 deletions
diff --git a/drivers/acpi/executer/exstore.c b/drivers/acpi/executer/exstore.c index 725614e277f8..36c0fccb137a 100644 --- a/drivers/acpi/executer/exstore.c +++ b/drivers/acpi/executer/exstore.c @@ -603,10 +603,17 @@ acpi_ex_store_object_to_node(union acpi_operand_object *source_desc, /* If no implicit conversion, drop into the default case below */ - if ((!implicit_conversion) || (walk_state->opcode == AML_COPY_OP)) { - - /* Force execution of default (no implicit conversion) */ - + if ((!implicit_conversion) || + ((walk_state->opcode == AML_COPY_OP) && + (target_type != ACPI_TYPE_LOCAL_REGION_FIELD) && + (target_type != ACPI_TYPE_LOCAL_BANK_FIELD) && + (target_type != ACPI_TYPE_LOCAL_INDEX_FIELD))) { + /* + * Force execution of default (no implicit conversion). Note: + * copy_object does not perform an implicit conversion, as per the ACPI + * spec -- except in case of region/bank/index fields -- because these + * objects must retain their original type permanently. + */ target_type = ACPI_TYPE_ANY; } |