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| author | Bob Moore <robert.moore@intel.com> | 2018-06-01 22:06:44 +0300 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2018-06-06 09:53:43 +0300 |
| commit | 7aa8a236487af86777926b62502885832d30adc5 (patch) | |
| tree | 6289feb29704a93c8772d6ac8ea53f6ba12c573f /drivers/acpi | |
| parent | 5088814a6e931350e5bd29f5d59fa40c6dbbdf10 (diff) | |
| download | linux-7aa8a236487af86777926b62502885832d30adc5.tar.xz | |
ACPICA: Interpreter: Begin deprecation of Unload operator
The Unload AML operator is no longer supported for the reasons below.
An AE_NOT_IMPLEMENTED exception is returned.
1) A correct implementation on at least some hosts may not be possible.
2) Other ACPI implementations do not correctly/fully support it.
3) It requires host device driver support which is not known to exist.
(To properly support namespace unload out from underneath.)
4) This AML operator has never been seen in the field.
Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Erik Schmauss <erik.schmauss@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'drivers/acpi')
| -rw-r--r-- | drivers/acpi/acpica/exconfig.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/drivers/acpi/acpica/exconfig.c b/drivers/acpi/acpica/exconfig.c index f85c6f3271f6..2373a7492151 100644 --- a/drivers/acpi/acpica/exconfig.c +++ b/drivers/acpi/acpica/exconfig.c @@ -490,6 +490,17 @@ acpi_status acpi_ex_unload_table(union acpi_operand_object *ddb_handle) ACPI_WARNING((AE_INFO, "Received request to unload an ACPI table")); /* + * May 2018: Unload is no longer supported for the following reasons: + * 1) A correct implementation on some hosts may not be possible. + * 2) Other ACPI implementations do not correctly/fully support it. + * 3) It requires host device driver support which does not exist. + * (To properly support namespace unload out from underneath.) + * 4) This AML operator has never been seen in the field. + */ + ACPI_EXCEPTION((AE_INFO, AE_NOT_IMPLEMENTED, + "AML Unload operator is not supported")); + + /* * Validate the handle * Although the handle is partially validated in acpi_ex_reconfiguration() * when it calls acpi_ex_resolve_operands(), the handle is more completely |