Re: [edk2-devel] [PATCH] MdeModulePkg: Fix port multiplier port in AhciPei PEIM

["Wu, Hao A" <hao.a.wu@intel.com>]

Thanks, the code changes look good to me.
May I know what tests have been performed for the patch?

Best Regards,
Hao Wu

> -----Original Message-----
> From: devel@edk2.groups.io <devel@edk2.groups.io> On Behalf Of Neo
> Hsueh via groups.io
> Sent: Wednesday, May 24, 2023 1:07 AM
> To: devel@edk2.groups.io
> Cc: jiangang.he@amd.com; abner.chang@amd.com; Neo Hsueh <Hong-
> Chih.Hsueh@amd.com>
> Subject: [edk2-devel] [PATCH] MdeModulePkg: Fix port multiplier port in
> AhciPei PEIM
> 
> 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.Hsueh@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
> 
> 
> 
> 
>