diff --git a/MdeModulePkg/Universal/Network/SnpDxe/Receive.c b/MdeModulePkg/Universal/Network/SnpDxe/Receive.c index a37156aa0b..9d03499327 100644 --- a/MdeModulePkg/Universal/Network/SnpDxe/Receive.c +++ b/MdeModulePkg/Universal/Network/SnpDxe/Receive.c @@ -132,6 +132,16 @@ PxeReceive ( *Protocol = (UINT16) PXE_SWAP_UINT16 (Db->Protocol); } + // + // We have received a packet from network interface, which implies that the + // network cable should be present. While, some UNDI driver may not report + // correct media status during Snp->Initialize(). So, we need ensure + // MediaPresent in SNP mode data is set to correct value. + // + if (Snp->Mode.MediaPresentSupported && !Snp->Mode.MediaPresent) { + Snp->Mode.MediaPresent = TRUE; + } + return (*BufferSize <= BuffSize) ? EFI_SUCCESS : EFI_BUFFER_TOO_SMALL; }