Thanks for fixing this issue. This version looks good to me. I test it on my 
system and it works well.

Reviewed-by: Nickle Wang <nick...@nvidia.com>

Regards,
Nickle

> -----Original Message-----
> From: Igor Kulchytskyy <ig...@ami.com>
> Sent: Tuesday, November 7, 2023 8:06 PM
> To: devel@edk2.groups.io
> Cc: Abner Chang <abner.ch...@amd.com>; Nickle Wang <nick...@nvidia.com>
> Subject: [PATCH v3] RedfishPkg: RedfishDiscoverDxe: Fix issue if IPv4 
> installed
> after RestEx
> 
> External email: Use caution opening links or attachments
> 
> 
> Supported function of the driver changed to wait for all newtwork interface 
> to be
> installed.
> Filer out the network interfaces which are not supported by Redfish Host
> Interface.
> 
> Cc: Abner Chang <abner.ch...@amd.com>
> Cc: Nickle Wang <nick...@nvidia.com>
> Signed-off-by: Igor Kulchytskyy <ig...@ami.com>
> ---
>  RedfishPkg/RedfishDiscoverDxe/RedfishDiscoverDxe.c | 165 ++++++++++++++---
> ---
>  1 file changed, 117 insertions(+), 48 deletions(-)
> 
> diff --git a/RedfishPkg/RedfishDiscoverDxe/RedfishDiscoverDxe.c
> b/RedfishPkg/RedfishDiscoverDxe/RedfishDiscoverDxe.c
> index 23da3b968f..85e47843e4 100644
> --- a/RedfishPkg/RedfishDiscoverDxe/RedfishDiscoverDxe.c
> +++ b/RedfishPkg/RedfishDiscoverDxe/RedfishDiscoverDxe.c
> @@ -322,9 +322,16 @@ GetTargetNetworkInterfaceInternal (  {
>    EFI_REDFISH_DISCOVER_NETWORK_INTERFACE_INTERNAL
> *ThisNetworkInterface;
> 
> +  if (IsListEmpty (&mEfiRedfishDiscoverNetworkInterface)) {
> +    return NULL;
> +  }
> +
>    ThisNetworkInterface =
> (EFI_REDFISH_DISCOVER_NETWORK_INTERFACE_INTERNAL *)GetFirstNode
> (&mEfiRedfishDiscoverNetworkInterface);
>    while (TRUE) {
> -    if (CompareMem ((VOID *)&ThisNetworkInterface->MacAddress,
> &TargetNetworkInterface->MacAddress, ThisNetworkInterface->HwAddressSize)
> == 0) {
> +    if ((CompareMem ((VOID *)&ThisNetworkInterface->MacAddress,
> &TargetNetworkInterface->MacAddress, ThisNetworkInterface->HwAddressSize)
> == 0) &&
> +        ((TargetNetworkInterface->IsIpv6 && (ThisNetworkInterface-
> >NetworkProtocolType == ProtocolTypeTcp6)) ||
> +         (!TargetNetworkInterface->IsIpv6 && (ThisNetworkInterface-
> >NetworkProtocolType == ProtocolTypeTcp4))))
> +    {
>        return ThisNetworkInterface;
>      }
> 
> @@ -354,6 +361,10 @@ GetTargetNetworkInterfaceInternalByController (  {
>    EFI_REDFISH_DISCOVER_NETWORK_INTERFACE_INTERNAL
> *ThisNetworkInterface;
> 
> +  if (IsListEmpty (&mEfiRedfishDiscoverNetworkInterface)) {
> +    return NULL;
> +  }
> +
>    ThisNetworkInterface =
> (EFI_REDFISH_DISCOVER_NETWORK_INTERFACE_INTERNAL *)GetFirstNode
> (&mEfiRedfishDiscoverNetworkInterface);
>    while (TRUE) {
>      if (ThisNetworkInterface->OpenDriverControllerHandle == ControllerHandle)
> { @@ -476,6 +487,42 @@ CheckIsIpVersion6 (
>    return FALSE;
>  }
> 
> +/**
> +  This function returns the  IP type supported by the Host Interface.
> +
> +  @retval 00h is Unknown
> +          01h is Ipv4
> +          02h is Ipv6
> +
> +**/
> +UINT8
> +GetHiIpProtocolType (
> +  VOID
> +  )
> +{
> +  EFI_STATUS                     Status;
> +  REDFISH_OVER_IP_PROTOCOL_DATA  *Data;
> +  REDFISH_INTERFACE_DATA         *DeviceDescriptor;
> +
> +  Data             = NULL;
> +  DeviceDescriptor = NULL;
> +  if (mSmbios == NULL) {
> +    Status = gBS->LocateProtocol (&gEfiSmbiosProtocolGuid, NULL, (VOID
> **)&mSmbios);
> +    if (EFI_ERROR (Status)) {
> +      return
> REDFISH_HOST_INTERFACE_HOST_IP_ADDRESS_FORMAT_UNKNOWN;
> +    }
> +  }
> +
> +  Status = RedfishGetHostInterfaceProtocolData (mSmbios,
> + &DeviceDescriptor, &Data); // Search for SMBIOS type 42h  if (!EFI_ERROR
> (Status) && (Data != NULL) &&
> +      (Data->HostIpAssignmentType == RedfishHostIpAssignmentStatic))  {
> +    return Data->HostIpAddressFormat;
> +  }
> +
> +  return REDFISH_HOST_INTERFACE_HOST_IP_ADDRESS_FORMAT_UNKNOWN;
> +}
> +
>  /**
>    This function discover Redfish service through SMBIOS host interface.
> 
> @@ -512,6 +559,18 @@ DiscoverRedfishHostInterface (
> 
>    Status = RedfishGetHostInterfaceProtocolData (mSmbios, &DeviceDescriptor,
> &Data); // Search for SMBIOS type 42h
>    if (!EFI_ERROR (Status) && (Data != NULL) && (DeviceDescriptor != NULL)) {
> +    if ((Instance->NetworkInterface->NetworkProtocolType == ProtocolTypeTcp4)
> &&
> +        (Data->HostIpAddressFormat !=
> REDFISH_HOST_INTERFACE_HOST_IP_ADDRESS_FORMAT_IP4)) // IPv4 case
> +    {
> +      DEBUG ((DEBUG_ERROR, "%a: Network Interface is IPv4, but Host Interface
> requires Ipv6\n", __func__));
> +      return EFI_UNSUPPORTED;
> +    } else if ((Instance->NetworkInterface->NetworkProtocolType ==
> ProtocolTypeTcp6) &&
> +               (Data->HostIpAddressFormat !=
> REDFISH_HOST_INTERFACE_HOST_IP_ADDRESS_FORMAT_IP6)) // IPv6 case
> +    {
> +      DEBUG ((DEBUG_ERROR, "%a: Network Interface is IPv6, but Host Interface
> requires IPv4\n", __func__));
> +      return EFI_UNSUPPORTED;
> +    }
> +
>      //
>      // Check if we can reach out Redfish service using this network 
> interface.
>      // Check with MAC address using Device Descriptor Data Device Type 04 and
> Type 05.
> @@ -1102,6 +1161,7 @@ RedfishServiceGetNetworkInterface (
>    OUT EFI_REDFISH_DISCOVER_NETWORK_INTERFACE  **NetworkIntfInstances
>    )
>  {
> +  EFI_STATUS                                       Status;
>    EFI_REDFISH_DISCOVER_NETWORK_INTERFACE_INTERNAL
> *ThisNetworkInterfaceIntn;
>    EFI_REDFISH_DISCOVER_NETWORK_INTERFACE           *ThisNetworkInterface;
>    EFI_REDFISH_DISCOVER_REST_EX_INSTANCE_INTERNAL   *RestExInstance;
> @@ -1141,13 +1201,23 @@ RedfishServiceGetNetworkInterface (
> 
>    ThisNetworkInterfaceIntn =
> (EFI_REDFISH_DISCOVER_NETWORK_INTERFACE_INTERNAL *)GetFirstNode
> (&mEfiRedfishDiscoverNetworkInterface);
>    while (TRUE) {
> +    // If Get Subnet Info failed then skip this interface
> +    Status = NetworkInterfaceGetSubnetInfo (ThisNetworkInterfaceIntn,
> ImageHandle); // Get subnet info
> +    if (EFI_ERROR (Status)) {
> +      if (IsNodeAtEnd (&mEfiRedfishDiscoverNetworkInterface,
> &ThisNetworkInterfaceIntn->Entry)) {
> +        break;
> +      }
> +
> +      ThisNetworkInterfaceIntn =
> (EFI_REDFISH_DISCOVER_NETWORK_INTERFACE_INTERNAL *)GetNextNode
> (&mEfiRedfishDiscoverNetworkInterface, &ThisNetworkInterfaceIntn->Entry);
> +      continue;
> +    }
> +
>      ThisNetworkInterface->IsIpv6 = FALSE;
>      if (CheckIsIpVersion6 (ThisNetworkInterfaceIntn)) {
>        ThisNetworkInterface->IsIpv6 = TRUE;
>      }
> 
>      CopyMem ((VOID *)&ThisNetworkInterface->MacAddress,
> &ThisNetworkInterfaceIntn->MacAddress, ThisNetworkInterfaceIntn-
> >HwAddressSize);
> -    NetworkInterfaceGetSubnetInfo (ThisNetworkInterfaceIntn, ImageHandle); //
> Get subnet info.
>      if (!ThisNetworkInterface->IsIpv6) {
>        IP4_COPY_ADDRESS (&ThisNetworkInterface->SubnetId.v4,
> &ThisNetworkInterfaceIntn->SubnetAddr.v4); // IPv4 subnet information.
>      } else {
> @@ -1230,7 +1300,12 @@ RedfishServiceAcquireService (
> 
>    if (TargetNetworkInterface != NULL) {
>      TargetNetworkInterfaceInternal = GetTargetNetworkInterfaceInternal
> (TargetNetworkInterface);
> -    NumNetworkInterfaces           = 1;
> +    if (TargetNetworkInterfaceInternal == NULL) {
> +      DEBUG ((DEBUG_ERROR, "%a:No network interface on platform.\n",
> __func__));
> +      return EFI_UNSUPPORTED;
> +    }
> +
> +    NumNetworkInterfaces = 1;
>    } else {
>      TargetNetworkInterfaceInternal =
> (EFI_REDFISH_DISCOVER_NETWORK_INTERFACE_INTERNAL *)GetFirstNode
> (&mEfiRedfishDiscoverNetworkInterface);
>      NumNetworkInterfaces           = NumberOfNetworkInterface ();
> @@ -1260,7 +1335,13 @@ RedfishServiceAcquireService (
>        // Get subnet information in case subnet information is not set because
>        // RedfishServiceGetNetworkInterfaces hasn't been called yet.
>        //
> -      NetworkInterfaceGetSubnetInfo (TargetNetworkInterfaceInternal,
> ImageHandle);
> +      Status1 = NetworkInterfaceGetSubnetInfo 
> (TargetNetworkInterfaceInternal,
> ImageHandle);
> +      if (EFI_ERROR (Status1)) {
> +        DEBUG ((DEBUG_ERROR, "%a: Get subnet information fail.\n", 
> __func__));
> +        FreePool (Instance);
> +        continue;
> +      }
> +
>        NewInstance = TRUE;
>      }
> 
> @@ -1547,25 +1628,26 @@ TestForRequiredProtocols (
>                      ControllerHandle,
>                      EFI_OPEN_PROTOCOL_TEST_PROTOCOL
>                      );
> +    if (EFI_ERROR (Status)) {
> +      return EFI_UNSUPPORTED;
> +    }
> +
> +    Status = gBS->OpenProtocol (
> +                    ControllerHandle,
> +                    gRequiredProtocol[Index].DiscoveredProtocolGuid,
> +                    (VOID **)&Id,
> +                    This->DriverBindingHandle,
> +                    ControllerHandle,
> +                    EFI_OPEN_PROTOCOL_GET_PROTOCOL
> +                    );
>      if (!EFI_ERROR (Status)) {
> -      Status = gBS->OpenProtocol (
> -                      ControllerHandle,
> -                      gRequiredProtocol[Index].DiscoveredProtocolGuid,
> -                      (VOID **)&Id,
> -                      This->DriverBindingHandle,
> -                      ControllerHandle,
> -                      EFI_OPEN_PROTOCOL_GET_PROTOCOL
> -                      );
> -      if (EFI_ERROR (Status)) {
> -        if (Index == ListCount - 1) {
> -          DEBUG ((DEBUG_INFO, "%a: all required protocols are found on this
> controller handle: %p.\n", __func__, ControllerHandle));
> -          return EFI_SUCCESS;
> -        }
> -      }
> +      // Already installed
> +      return EFI_UNSUPPORTED;
>      }
>    }
> 
> -  return EFI_UNSUPPORTED;
> +  DEBUG ((DEBUG_MANAGEABILITY, "%a: all required protocols are found on
> + this controller handle: %p.\n", __func__, ControllerHandle));  return
> + EFI_SUCCESS;
>  }
> 
>  /**
> @@ -1600,10 +1682,24 @@ BuildupNetworkInterface (
>    EFI_REDFISH_DISCOVER_REST_EX_INSTANCE_INTERNAL   *RestExInstance;
>    EFI_TPL                                          OldTpl;
>    BOOLEAN                                          
> NewNetworkInterfaceInstalled;
> +  UINT8                                            IpType;
> +  UINTN                                            ListCount;
> 
> +  ListCount                    = (sizeof (gRequiredProtocol) / sizeof
> (REDFISH_DISCOVER_REQUIRED_PROTOCOL));
>    NewNetworkInterfaceInstalled = FALSE;
>    Index                        = 0;
> -  do {
> +
> +  // Get IP Type to filter out unnecessary network protocol if possible
> + IpType = GetHiIpProtocolType ();
> +
> +  for (Index = 0; Index < ListCount; Index++) {
> +    // Check IP Type and skip an unnecessary network protocol if does not 
> match
> +    if (((gRequiredProtocol[Index].ProtocolType == ProtocolTypeTcp4) && 
> (IpType
> == REDFISH_HOST_INTERFACE_HOST_IP_ADDRESS_FORMAT_IP6)) ||
> +        ((gRequiredProtocol[Index].ProtocolType == ProtocolTypeTcp6) && 
> (IpType
> == REDFISH_HOST_INTERFACE_HOST_IP_ADDRESS_FORMAT_IP4)))
> +    {
> +      continue;
> +    }
> +
>      Status = gBS->OpenProtocol (
>                      // Already in list?
>                      ControllerHandle,
> @@ -1614,11 +1710,6 @@ BuildupNetworkInterface (
>                      EFI_OPEN_PROTOCOL_GET_PROTOCOL
>                      );
>      if (!EFI_ERROR (Status)) {
> -      Index++;
> -      if (Index == (sizeof (gRequiredProtocol) / sizeof
> (REDFISH_DISCOVER_REQUIRED_PROTOCOL))) {
> -        break;
> -      }
> -
>        continue;
>      }
> 
> @@ -1631,11 +1722,6 @@ BuildupNetworkInterface (
>                      EFI_OPEN_PROTOCOL_GET_PROTOCOL
>                      );
>      if (EFI_ERROR (Status)) {
> -      Index++;
> -      if (Index == (sizeof (gRequiredProtocol) / sizeof
> (REDFISH_DISCOVER_REQUIRED_PROTOCOL))) {
> -        break;
> -      }
> -
>        continue;
>      }
> 
> @@ -1694,11 +1780,6 @@ BuildupNetworkInterface (
>                      ProtocolDiscoverIdPtr
>                      );
>      if (EFI_ERROR (Status)) {
> -      Index++;
> -      if (Index == (sizeof (gRequiredProtocol) / sizeof
> (REDFISH_DISCOVER_REQUIRED_PROTOCOL))) {
> -        break;
> -      }
> -
>        continue;
>      }
> 
> @@ -1755,25 +1836,13 @@ BuildupNetworkInterface (
>            }
>          } else {
>            DEBUG ((DEBUG_MANAGEABILITY, "%a: Not REST EX, continue with
> next\n", __func__));
> -          Index++;
> -          if (Index == (sizeof (gRequiredProtocol) / sizeof
> (REDFISH_DISCOVER_REQUIRED_PROTOCOL))) {
> -            break;
> -          }
> -
>            continue;
>          }
>        }
> 
>        return Status;
> -    } else {
> -      Index++;
> -      if (Index == (sizeof (gRequiredProtocol) / sizeof
> (REDFISH_DISCOVER_REQUIRED_PROTOCOL))) {
> -        break;
> -      }
> -
> -      continue;
>      }
> -  } while (Index < (sizeof (gRequiredProtocol) / sizeof
> (REDFISH_DISCOVER_REQUIRED_PROTOCOL)));
> +  }
> 
>    return EFI_DEVICE_ERROR;
>  }
> --
> 2.37.1.windows.1
> -The information contained in this message may be confidential and proprietary
> to American Megatrends (AMI). This communication is intended to be read only 
> by
> the individual or entity to whom it is addressed or by their designee. If the 
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