6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Daniil Tatianin d-tatianin@yandex-team.ru
[ Upstream commit 0f8af0356a45547683a216e4921006a3c6a6d922 ]
The initial commit that introduced support for FFixedHW operation regions did add a special case in the AcpiExReadSerialBus If, but forgot to actually handle it inside the switch, so add the missing case to prevent reads from failing with AE_AML_INVALID_SPACE_ID.
Link: https://github.com/acpica/acpica/pull/998 Fixes: ee64b827a9a ("ACPICA: Add support for FFH Opregion special context data") Signed-off-by: Daniil Tatianin d-tatianin@yandex-team.ru Link: https://patch.msgid.link/20250401184312.599962-1-d-tatianin@yandex-team.ru Signed-off-by: Rafael J. Wysocki rafael.j.wysocki@intel.com Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/acpi/acpica/exserial.c | 6 ++++++ 1 file changed, 6 insertions(+)
diff --git a/drivers/acpi/acpica/exserial.c b/drivers/acpi/acpica/exserial.c index 5241f4c01c765..89a4ac447a2be 100644 --- a/drivers/acpi/acpica/exserial.c +++ b/drivers/acpi/acpica/exserial.c @@ -201,6 +201,12 @@ acpi_ex_read_serial_bus(union acpi_operand_object *obj_desc, function = ACPI_READ; break;
+ case ACPI_ADR_SPACE_FIXED_HARDWARE: + + buffer_length = ACPI_FFH_INPUT_BUFFER_SIZE; + function = ACPI_READ; + break; + default: return_ACPI_STATUS(AE_AML_INVALID_SPACE_ID); }