If there is no port multiplier, PortMultiplierPort should be converted
to 0 to follow AHCI spec.
The same logic already applied in AtaAtapiPassThruDxe driver.
Signed-off-by: Neo Hsueh <hong-chih.hs...@amd.com>
---
MdeModulePkg/Bus/Ata/AhciPei/AhciPeiPassThru.c | 10 ++++++++++
1 file changed, 10 insertions(+)
diff --git a/MdeModulePkg/Bus/Ata/AhciPei/AhciPeiPassThru.c
b/MdeModulePkg/Bus/Ata/AhciPei/AhciPeiPassThru.c
index cd55272c96..7bd04661d0 100644
--- a/MdeModulePkg/Bus/Ata/AhciPei/AhciPeiPassThru.c
+++ b/MdeModulePkg/Bus/Ata/AhciPei/AhciPeiPassThru.c
@@ -3,6 +3,7 @@
mode at PEI phase.
Copyright (c) 2019, Intel Corporation. All rights reserved.<BR>
+ Copyright (C) 2023 Advanced Micro Devices, Inc. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
@@ -92,6 +93,15 @@ AhciPassThruExecute (
{
EFI_STATUS Status;
+ if (PortMultiplierPort == 0xFFFF) {
+ //
+ // If there is no port multiplier, PortMultiplierPort will be 0xFFFF
+ // according to UEFI spec. Here, we convert its value to 0 to follow
+ // AHCI spec.
+ //
+ PortMultiplierPort = 0;
+ }
+
switch (Packet->Protocol) {
case EFI_ATA_PASS_THRU_PROTOCOL_ATA_NON_DATA:
Status = AhciNonDataTransfer (
--
2.40.0.windows.1
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