diff options
Diffstat (limited to 'MdeModulePkg/Bus/Ata/AtaAtapiPassThru/AhciMode.c')
| -rw-r--r-- | MdeModulePkg/Bus/Ata/AtaAtapiPassThru/AhciMode.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/MdeModulePkg/Bus/Ata/AtaAtapiPassThru/AhciMode.c b/MdeModulePkg/Bus/Ata/AtaAtapiPassThru/AhciMode.c index 42ee5bc580..c2c2c2869a 100644 --- a/MdeModulePkg/Bus/Ata/AtaAtapiPassThru/AhciMode.c +++ b/MdeModulePkg/Bus/Ata/AtaAtapiPassThru/AhciMode.c @@ -2278,7 +2278,10 @@ AhciModeInitialization ( if (PhyDetectDelay == 0) {
//
// No device detected at this port.
+ // Clear PxCMD.SUD for those ports at which there are no device present.
//
+ Offset = EFI_AHCI_PORT_START + Port * EFI_AHCI_PORT_REG_WIDTH + EFI_AHCI_PORT_CMD;
+ AhciAndReg (PciIo, Offset, (UINT32) ~(EFI_AHCI_PORT_CMD_SUD));
continue;
}
|