below patch fixes the bug which assigns the Status to error code on success.

diff --git a/MdeModulePkg/Bus/Ata/AtaAtapiPassThru/AhciMode.c b/MdeModulePkg/Bus/Ata/AtaAtapiPassThru/AhciMode.c
index 950b5da..ab18dcb 100644
--- a/MdeModulePkg/Bus/Ata/AtaAtapiPassThru/AhciMode.c
+++ b/MdeModulePkg/Bus/Ata/AtaAtapiPassThru/AhciMode.c
@@ -782,7 +782,6 @@ AhciPioTransfer (
       Offset = FisBaseAddr + EFI_AHCI_D2H_FIS_OFFSET;
       Status = AhciCheckMemSet (Offset, EFI_AHCI_FIS_TYPE_MASK, EFI_AHCI_FIS_REGISTER_D2H, 0);
       if (!EFI_ERROR (Status)) {
-        Status = EFI_DEVICE_ERROR;
         break;
       }