From: Daniil Tatianin Date: Tue, 1 Apr 2025 18:43:11 +0000 (+0300) Subject: ACPICA: exserial: don't forget to handle FFixedHW opregions for reading X-Git-Tag: v6.16-rc1~161^2~4^2~20^2~1 X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=0f8af0356a45547683a216e4921006a3c6a6d922;p=thirdparty%2Fkernel%2Flinux.git ACPICA: exserial: don't forget to handle FFixedHW opregions for reading 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 Link: https://patch.msgid.link/20250401184312.599962-1-d-tatianin@yandex-team.ru Signed-off-by: Rafael J. Wysocki --- 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); }