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ACPICA: exserial: don't forget to handle FFixedHW opregions for reading

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[ 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: ee64b827a9 ("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>
This commit is contained in:
Daniil Tatianin
2025-04-01 21:43:11 +03:00
committed by Greg Kroah-Hartman
parent f6941e72d3
commit 8b94e19ada
1 changed files with 6 additions and 0 deletions
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6
drivers/acpi/acpica/exserial.c
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@@ -201,6 +201,12 @@ acpi_ex_read_serial_bus(union acpi_operand_object *obj_desc,
function = ACPI_READ; function = ACPI_READ;
break; break;
case ACPI_ADR_SPACE_FIXED_HARDWARE:
buffer_length = ACPI_FFH_INPUT_BUFFER_SIZE;
function = ACPI_READ;
break;
default: default:
return_ACPI_STATUS(AE_AML_INVALID_SPACE_ID); return_ACPI_STATUS(AE_AML_INVALID_SPACE_ID);
} }