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| author | Lin Ming <ming.m.lin@intel.com> | 2008-09-27 08:01:12 +0400 |
|---|---|---|
| committer | Len Brown <len.brown@intel.com> | 2008-10-23 07:14:49 +0400 |
| commit | b9d1312ad4246e467f333dfe2ac4dc7a79608d59 (patch) | |
| tree | b0d6824fd97a52ab06f7427d45909858a791d3b2 /drivers/acpi | |
| parent | d8a0ec914afa1a994d2f6184ac4c6668b5f8068f (diff) | |
| download | linux-b9d1312ad4246e467f333dfe2ac4dc7a79608d59.tar.xz | |
ACPICA: Fix for implicit return compatibility
Predicate can be used for an implicit return value.
This change improves the implicit return mechanism to be more
compatible with the MS interpreter.
http://www.acpica.org/bugzilla/show_bug.cgi?id=349
Below AML code from http://bugzilla.kernel.org/show_bug.cgi?id=10686
Store(0x07D6, OSYS)
Method (_CRT, 0, Serialized)
{
If (LLess (OSYS, 0x07D6))
{
If (LEqual (\_SB.TJ85, Zero))
{
Return (Add (0x0AAC, Multiply (TPC, 0x0A)))
}
Else
{
Return (Add (0x0AAC, Multiply (TP85, 0x0A)))
}
}
}
Previously _CRT returns 0x07D6, now it returns 0 (predicate value of LLess)
Signed-off-by: Lin Ming <ming.m.lin@intel.com>
Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'drivers/acpi')
| -rw-r--r-- | drivers/acpi/dispatcher/dswexec.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/acpi/dispatcher/dswexec.c b/drivers/acpi/dispatcher/dswexec.c index 5b2419197b9b..396fe12078cd 100644 --- a/drivers/acpi/dispatcher/dswexec.c +++ b/drivers/acpi/dispatcher/dswexec.c @@ -166,6 +166,10 @@ acpi_ds_get_predicate_value(struct acpi_walk_state *walk_state, status = AE_CTRL_FALSE; } + /* Predicate can be used for an implicit return value */ + + (void)acpi_ds_do_implicit_return(local_obj_desc, walk_state, TRUE); + cleanup: ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "Completed a predicate eval=%X Op=%p\n", |