[edk2] [Patch 1/3] NetworkPkg: Update Api from NetLibDetectMedia to NetLibDetectMediaWaitTimeout.

fanwang2 posted 3 patches 7 years, 1 month ago
[edk2] [Patch 1/3] NetworkPkg: Update Api from NetLibDetectMedia to NetLibDetectMediaWaitTimeout.
Posted by fanwang2 7 years, 1 month ago
Since new Api NetLibDetectMediaWaitTimeout was involved to support connecting
state handling, and it is forward compatible. So apply this Api in Network.

Cc: Ye Ting <ting.ye@intel.com>
Cc: Fu Siyuan <siyuan.fu@intel.com>
Cc: Wu Jiaxin <jiaxin.wu@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Wang Fan <fan.wang@intel.com>
---
 NetworkPkg/DnsDxe/DnsDhcp.c           | 20 ++++++++++----------
 NetworkPkg/HttpBootDxe/HttpBootImpl.c | 10 +++++-----
 NetworkPkg/IScsiDxe/IScsiDhcp.c       | 11 ++++++-----
 NetworkPkg/IScsiDxe/IScsiDhcp6.c      | 11 ++++++-----
 NetworkPkg/IScsiDxe/IScsiProto.c      |  8 ++++----
 NetworkPkg/UefiPxeBcDxe/PxeBcImpl.c   | 10 +++++-----
 6 files changed, 36 insertions(+), 34 deletions(-)

diff --git a/NetworkPkg/DnsDxe/DnsDhcp.c b/NetworkPkg/DnsDxe/DnsDhcp.c
index 93779be..604047c 100644
--- a/NetworkPkg/DnsDxe/DnsDhcp.c
+++ b/NetworkPkg/DnsDxe/DnsDhcp.c
@@ -267,11 +267,11 @@ GetDns4ServerFromDhcp4 (
   )
 {
   EFI_STATUS                          Status;
   EFI_HANDLE                          Image;
   EFI_HANDLE                          Controller;
-  BOOLEAN                             MediaPresent;
+  EFI_STATUS                          MediaStatus;
   EFI_HANDLE                          MnpChildHandle;  
   EFI_MANAGED_NETWORK_PROTOCOL        *Mnp;
   EFI_MANAGED_NETWORK_CONFIG_DATA     MnpConfigData;
   EFI_HANDLE                          Dhcp4Handle;  
   EFI_DHCP4_PROTOCOL                  *Dhcp4;
@@ -312,15 +312,15 @@ GetDns4ServerFromDhcp4 (
   DnsServerInfor.ServerCount = DnsServerCount;
 
   IsDone = FALSE;
 
   //
-  // Check media.
+  // Check media status, wait no more than 20 seconds
   //
-  MediaPresent = TRUE;
-  NetLibDetectMedia (Controller, &MediaPresent);
-  if (!MediaPresent) {
+  MediaStatus = EFI_SUCCESS;
+  NetLibDetectMediaWaitTimeout (Controller, EFI_TIMER_PERIOD_SECONDS(20), &MediaStatus);
+  if (MediaStatus != EFI_SUCCESS) {
     return EFI_NO_MEDIA;
   }
 
   //
   // Create a Mnp child instance, get the protocol and config for it.
@@ -618,11 +618,11 @@ GetDns6ServerFromDhcp6 (
   EFI_STATUS                Status;
   EFI_STATUS                TimerStatus;
   EFI_DHCP6_PACKET_OPTION   *Oro;
   EFI_DHCP6_RETRANSMISSION  InfoReqReXmit;
   EFI_EVENT                 Timer;
-  BOOLEAN                   MediaPresent;
+  EFI_STATUS                MediaStatus;
   DNS6_SERVER_INFOR         DnsServerInfor;
 
   Dhcp6Handle = NULL;
   Dhcp6       = NULL;
   Oro         = NULL;
@@ -631,15 +631,15 @@ GetDns6ServerFromDhcp6 (
   ZeroMem (&DnsServerInfor, sizeof (DNS6_SERVER_INFOR));
 
   DnsServerInfor.ServerCount = DnsServerCount;
 
   //
-  // Check media status before doing DHCP.
+  // Check media, wait no more than 20 seconds
   //
-  MediaPresent = TRUE;
-  NetLibDetectMedia (Controller, &MediaPresent);
-  if (!MediaPresent) {
+  MediaStatus = EFI_SUCCESS;
+  NetLibDetectMediaWaitTimeout (Controller, EFI_TIMER_PERIOD_SECONDS(20), &MediaStatus);
+  if (MediaStatus != EFI_SUCCESS) {
     return EFI_NO_MEDIA;
   }
 
   //
   // Create a DHCP6 child instance and get the protocol.
diff --git a/NetworkPkg/HttpBootDxe/HttpBootImpl.c b/NetworkPkg/HttpBootDxe/HttpBootImpl.c
index d591db5..05fea28 100644
--- a/NetworkPkg/HttpBootDxe/HttpBootImpl.c
+++ b/NetworkPkg/HttpBootDxe/HttpBootImpl.c
@@ -546,11 +546,11 @@ HttpBootDxeLoadFile (
   IN VOID                             *Buffer OPTIONAL
   )
 {
   HTTP_BOOT_PRIVATE_DATA        *Private;
   HTTP_BOOT_VIRTUAL_NIC         *VirtualNic;
-  BOOLEAN                       MediaPresent;
+  EFI_STATUS                    MediaStatus;
   BOOLEAN                       UsingIpv6;
   EFI_STATUS                    Status;
   HTTP_BOOT_IMAGE_TYPE          ImageType;
 
   if (This == NULL || BufferSize == NULL || FilePath == NULL) {
@@ -566,15 +566,15 @@ HttpBootDxeLoadFile (
 
   VirtualNic = HTTP_BOOT_VIRTUAL_NIC_FROM_LOADFILE (This);
   Private = VirtualNic->Private;
   
   //
-  // Check media status before HTTP boot start
+  // Check media status before HTTP boot start, wait no more than 20 seconds
   //
-  MediaPresent = TRUE;
-  NetLibDetectMedia (Private->Controller, &MediaPresent);
-  if (!MediaPresent) {
+  MediaStatus = EFI_SUCCESS;
+  NetLibDetectMediaWaitTimeout (Private->Controller, EFI_TIMER_PERIOD_SECONDS(20), &MediaStatus);
+  if (MediaStatus != EFI_SUCCESS) {
     AsciiPrint ("\n  Error: Could not detect network connection.\n");
     return EFI_NO_MEDIA;
   }
   
   //
diff --git a/NetworkPkg/IScsiDxe/IScsiDhcp.c b/NetworkPkg/IScsiDxe/IScsiDhcp.c
index 309ce0d..6d25cde 100644
--- a/NetworkPkg/IScsiDxe/IScsiDhcp.c
+++ b/NetworkPkg/IScsiDxe/IScsiDhcp.c
@@ -441,23 +441,24 @@ IScsiDoDhcp (
   EFI_DHCP4_PROTOCOL            *Dhcp4;
   EFI_STATUS                    Status;
   EFI_DHCP4_PACKET_OPTION       *ParaList;
   EFI_DHCP4_CONFIG_DATA         Dhcp4ConfigData;
   ISCSI_SESSION_CONFIG_NVDATA   *NvData;
-  BOOLEAN                       MediaPresent;
+  EFI_STATUS                    MediaStatus;
 
   Dhcp4Handle = NULL;
   Ip4Config2  = NULL;
   Dhcp4       = NULL;
   ParaList    = NULL;
 
   //
-  // Check media status before doing DHCP.
+  // Check media status, no more than 20 seconds
   //
-  MediaPresent = TRUE;
-  NetLibDetectMedia (Controller, &MediaPresent);
-  if (!MediaPresent) {
+  MediaStatus = EFI_SUCCESS;
+  NetLibDetectMediaWaitTimeout (Controller, EFI_TIMER_PERIOD_SECONDS(20), &MediaStatus);
+  if (MediaStatus!= EFI_SUCCESS) {
+    AsciiPrint ("\n  Error: Could not detect network connection.\n");
     return EFI_NO_MEDIA;
   }
 
   //
   // DHCP4 service allows only one of its children to be configured in  
diff --git a/NetworkPkg/IScsiDxe/IScsiDhcp6.c b/NetworkPkg/IScsiDxe/IScsiDhcp6.c
index 06c634c..0d57704 100644
--- a/NetworkPkg/IScsiDxe/IScsiDhcp6.c
+++ b/NetworkPkg/IScsiDxe/IScsiDhcp6.c
@@ -399,18 +399,19 @@ IScsiDoDhcp6 (
   EFI_STATUS                Status;
   EFI_STATUS                TimerStatus;
   EFI_DHCP6_PACKET_OPTION   *Oro;
   EFI_DHCP6_RETRANSMISSION  InfoReqReXmit;
   EFI_EVENT                 Timer;
-  BOOLEAN                   MediaPresent;
+  EFI_STATUS                MediaStatus;
 
   //
-  // Check media status before doing DHCP.
+  // Check media status, no more than 20 seconds
   //
-  MediaPresent = TRUE;
-  NetLibDetectMedia (Controller, &MediaPresent);
-  if (!MediaPresent) {
+  MediaStatus = EFI_SUCCESS;
+  NetLibDetectMediaWaitTimeout (Controller, EFI_TIMER_PERIOD_SECONDS(20), &MediaStatus);
+  if (MediaStatus != EFI_SUCCESS) {
+    AsciiPrint ("\n  Error: Could not detect network connection.\n");
     return EFI_NO_MEDIA;
   }
 
   //
   // iSCSI will only request target info from DHCPv6 server.
diff --git a/NetworkPkg/IScsiDxe/IScsiProto.c b/NetworkPkg/IScsiDxe/IScsiProto.c
index 1602a26..ccdd5df 100644
--- a/NetworkPkg/IScsiDxe/IScsiProto.c
+++ b/NetworkPkg/IScsiDxe/IScsiProto.c
@@ -442,18 +442,18 @@ IScsiSessionLogin (
   EFI_STATUS        Status;
   ISCSI_CONNECTION  *Conn;
   VOID              *Tcp;
   EFI_GUID          *ProtocolGuid;
   UINT8             RetryCount;
-  BOOLEAN           MediaPresent;
+  EFI_STATUS        MediaStatus;
 
   //
   // Check media status before session login.
   //
-  MediaPresent = TRUE;
-  NetLibDetectMedia (Session->Private->Controller, &MediaPresent);
-  if (!MediaPresent) {
+  MediaStatus = EFI_SUCCESS;
+  NetLibDetectMediaWaitTimeout (Session->Private->Controller, EFI_TIMER_PERIOD_SECONDS(20), &MediaStatus);
+  if (MediaStatus != EFI_SUCCESS) {
     return EFI_NO_MEDIA;
   }
 
   //
   // Set session identifier
diff --git a/NetworkPkg/UefiPxeBcDxe/PxeBcImpl.c b/NetworkPkg/UefiPxeBcDxe/PxeBcImpl.c
index ab9e494..7940cbe 100644
--- a/NetworkPkg/UefiPxeBcDxe/PxeBcImpl.c
+++ b/NetworkPkg/UefiPxeBcDxe/PxeBcImpl.c
@@ -2345,11 +2345,11 @@ EfiPxeLoadFile (
   PXEBC_PRIVATE_DATA          *Private;
   PXEBC_VIRTUAL_NIC           *VirtualNic;
   EFI_PXE_BASE_CODE_PROTOCOL  *PxeBc;
   BOOLEAN                     UsingIpv6;
   EFI_STATUS                  Status;
-  BOOLEAN                     MediaPresent;
+  EFI_STATUS                  MediaStatus;
 
   if (FilePath == NULL || !IsDevicePathEnd (FilePath)) {
     return EFI_INVALID_PARAMETER;
   }
   
@@ -2369,15 +2369,15 @@ EfiPxeLoadFile (
   if (!BootPolicy) {
     return EFI_UNSUPPORTED;
   }
 
   //
-  // Check media status before PXE start
+  // Check media status before PXE start, wait no more than 20 seconds
   //
-  MediaPresent = TRUE;
-  NetLibDetectMedia (Private->Controller, &MediaPresent);
-  if (!MediaPresent) {
+  MediaStatus = EFI_SUCCESS;
+  NetLibDetectMediaWaitTimeout (Private->Controller, EFI_TIMER_PERIOD_SECONDS(20), &MediaStatus);
+  if (MediaStatus != EFI_SUCCESS) {
     return EFI_NO_MEDIA;
   }
 
   //
   // Check whether the virtual nic is using IPv6 or not.
-- 
1.9.5.msysgit.1

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Re: [edk2] [Patch 1/3] NetworkPkg: Update Api from NetLibDetectMedia to NetLibDetectMediaWaitTimeout.
Posted by Fu, Siyuan 7 years, 1 month ago
Hi, Fan

We'd better to define a macro for the timeout, instead of using 20 in each place.

BestRegards
Fu Siyuan


> -----Original Message-----
> From: Wang, Fan
> Sent: Tuesday, December 12, 2017 4:54 PM
> To: edk2-devel@lists.01.org
> Cc: Ye, Ting <ting.ye@intel.com>; Fu, Siyuan <siyuan.fu@intel.com>; Wu,
> Jiaxin <jiaxin.wu@intel.com>; Wang, Fan <fan.wang@intel.com>
> Subject: [Patch 1/3] NetworkPkg: Update Api from NetLibDetectMedia to
> NetLibDetectMediaWaitTimeout.
> 
> Since new Api NetLibDetectMediaWaitTimeout was involved to support
> connecting
> state handling, and it is forward compatible. So apply this Api in Network.
> 
> Cc: Ye Ting <ting.ye@intel.com>
> Cc: Fu Siyuan <siyuan.fu@intel.com>
> Cc: Wu Jiaxin <jiaxin.wu@intel.com>
> Contributed-under: TianoCore Contribution Agreement 1.0
> Signed-off-by: Wang Fan <fan.wang@intel.com>
> ---
>  NetworkPkg/DnsDxe/DnsDhcp.c           | 20 ++++++++++----------
>  NetworkPkg/HttpBootDxe/HttpBootImpl.c | 10 +++++-----
>  NetworkPkg/IScsiDxe/IScsiDhcp.c       | 11 ++++++-----
>  NetworkPkg/IScsiDxe/IScsiDhcp6.c      | 11 ++++++-----
>  NetworkPkg/IScsiDxe/IScsiProto.c      |  8 ++++----
>  NetworkPkg/UefiPxeBcDxe/PxeBcImpl.c   | 10 +++++-----
>  6 files changed, 36 insertions(+), 34 deletions(-)
> 
> diff --git a/NetworkPkg/DnsDxe/DnsDhcp.c b/NetworkPkg/DnsDxe/DnsDhcp.c
> index 93779be..604047c 100644
> --- a/NetworkPkg/DnsDxe/DnsDhcp.c
> +++ b/NetworkPkg/DnsDxe/DnsDhcp.c
> @@ -267,11 +267,11 @@ GetDns4ServerFromDhcp4 (
>    )
>  {
>    EFI_STATUS                          Status;
>    EFI_HANDLE                          Image;
>    EFI_HANDLE                          Controller;
> -  BOOLEAN                             MediaPresent;
> +  EFI_STATUS                          MediaStatus;
>    EFI_HANDLE                          MnpChildHandle;
>    EFI_MANAGED_NETWORK_PROTOCOL        *Mnp;
>    EFI_MANAGED_NETWORK_CONFIG_DATA     MnpConfigData;
>    EFI_HANDLE                          Dhcp4Handle;
>    EFI_DHCP4_PROTOCOL                  *Dhcp4;
> @@ -312,15 +312,15 @@ GetDns4ServerFromDhcp4 (
>    DnsServerInfor.ServerCount = DnsServerCount;
> 
>    IsDone = FALSE;
> 
>    //
> -  // Check media.
> +  // Check media status, wait no more than 20 seconds
>    //
> -  MediaPresent = TRUE;
> -  NetLibDetectMedia (Controller, &MediaPresent);
> -  if (!MediaPresent) {
> +  MediaStatus = EFI_SUCCESS;
> +  NetLibDetectMediaWaitTimeout (Controller, EFI_TIMER_PERIOD_SECONDS(20),
> &MediaStatus);
> +  if (MediaStatus != EFI_SUCCESS) {
>      return EFI_NO_MEDIA;
>    }
> 
>    //
>    // Create a Mnp child instance, get the protocol and config for it.
> @@ -618,11 +618,11 @@ GetDns6ServerFromDhcp6 (
>    EFI_STATUS                Status;
>    EFI_STATUS                TimerStatus;
>    EFI_DHCP6_PACKET_OPTION   *Oro;
>    EFI_DHCP6_RETRANSMISSION  InfoReqReXmit;
>    EFI_EVENT                 Timer;
> -  BOOLEAN                   MediaPresent;
> +  EFI_STATUS                MediaStatus;
>    DNS6_SERVER_INFOR         DnsServerInfor;
> 
>    Dhcp6Handle = NULL;
>    Dhcp6       = NULL;
>    Oro         = NULL;
> @@ -631,15 +631,15 @@ GetDns6ServerFromDhcp6 (
>    ZeroMem (&DnsServerInfor, sizeof (DNS6_SERVER_INFOR));
> 
>    DnsServerInfor.ServerCount = DnsServerCount;
> 
>    //
> -  // Check media status before doing DHCP.
> +  // Check media, wait no more than 20 seconds
>    //
> -  MediaPresent = TRUE;
> -  NetLibDetectMedia (Controller, &MediaPresent);
> -  if (!MediaPresent) {
> +  MediaStatus = EFI_SUCCESS;
> +  NetLibDetectMediaWaitTimeout (Controller, EFI_TIMER_PERIOD_SECONDS(20),
> &MediaStatus);
> +  if (MediaStatus != EFI_SUCCESS) {
>      return EFI_NO_MEDIA;
>    }
> 
>    //
>    // Create a DHCP6 child instance and get the protocol.
> diff --git a/NetworkPkg/HttpBootDxe/HttpBootImpl.c
> b/NetworkPkg/HttpBootDxe/HttpBootImpl.c
> index d591db5..05fea28 100644
> --- a/NetworkPkg/HttpBootDxe/HttpBootImpl.c
> +++ b/NetworkPkg/HttpBootDxe/HttpBootImpl.c
> @@ -546,11 +546,11 @@ HttpBootDxeLoadFile (
>    IN VOID                             *Buffer OPTIONAL
>    )
>  {
>    HTTP_BOOT_PRIVATE_DATA        *Private;
>    HTTP_BOOT_VIRTUAL_NIC         *VirtualNic;
> -  BOOLEAN                       MediaPresent;
> +  EFI_STATUS                    MediaStatus;
>    BOOLEAN                       UsingIpv6;
>    EFI_STATUS                    Status;
>    HTTP_BOOT_IMAGE_TYPE          ImageType;
> 
>    if (This == NULL || BufferSize == NULL || FilePath == NULL) {
> @@ -566,15 +566,15 @@ HttpBootDxeLoadFile (
> 
>    VirtualNic = HTTP_BOOT_VIRTUAL_NIC_FROM_LOADFILE (This);
>    Private = VirtualNic->Private;
> 
>    //
> -  // Check media status before HTTP boot start
> +  // Check media status before HTTP boot start, wait no more than 20
> seconds
>    //
> -  MediaPresent = TRUE;
> -  NetLibDetectMedia (Private->Controller, &MediaPresent);
> -  if (!MediaPresent) {
> +  MediaStatus = EFI_SUCCESS;
> +  NetLibDetectMediaWaitTimeout (Private->Controller,
> EFI_TIMER_PERIOD_SECONDS(20), &MediaStatus);
> +  if (MediaStatus != EFI_SUCCESS) {
>      AsciiPrint ("\n  Error: Could not detect network connection.\n");
>      return EFI_NO_MEDIA;
>    }
> 
>    //
> diff --git a/NetworkPkg/IScsiDxe/IScsiDhcp.c
> b/NetworkPkg/IScsiDxe/IScsiDhcp.c
> index 309ce0d..6d25cde 100644
> --- a/NetworkPkg/IScsiDxe/IScsiDhcp.c
> +++ b/NetworkPkg/IScsiDxe/IScsiDhcp.c
> @@ -441,23 +441,24 @@ IScsiDoDhcp (
>    EFI_DHCP4_PROTOCOL            *Dhcp4;
>    EFI_STATUS                    Status;
>    EFI_DHCP4_PACKET_OPTION       *ParaList;
>    EFI_DHCP4_CONFIG_DATA         Dhcp4ConfigData;
>    ISCSI_SESSION_CONFIG_NVDATA   *NvData;
> -  BOOLEAN                       MediaPresent;
> +  EFI_STATUS                    MediaStatus;
> 
>    Dhcp4Handle = NULL;
>    Ip4Config2  = NULL;
>    Dhcp4       = NULL;
>    ParaList    = NULL;
> 
>    //
> -  // Check media status before doing DHCP.
> +  // Check media status, no more than 20 seconds
>    //
> -  MediaPresent = TRUE;
> -  NetLibDetectMedia (Controller, &MediaPresent);
> -  if (!MediaPresent) {
> +  MediaStatus = EFI_SUCCESS;
> +  NetLibDetectMediaWaitTimeout (Controller, EFI_TIMER_PERIOD_SECONDS(20),
> &MediaStatus);
> +  if (MediaStatus!= EFI_SUCCESS) {
> +    AsciiPrint ("\n  Error: Could not detect network connection.\n");
>      return EFI_NO_MEDIA;
>    }
> 
>    //
>    // DHCP4 service allows only one of its children to be configured in
> diff --git a/NetworkPkg/IScsiDxe/IScsiDhcp6.c
> b/NetworkPkg/IScsiDxe/IScsiDhcp6.c
> index 06c634c..0d57704 100644
> --- a/NetworkPkg/IScsiDxe/IScsiDhcp6.c
> +++ b/NetworkPkg/IScsiDxe/IScsiDhcp6.c
> @@ -399,18 +399,19 @@ IScsiDoDhcp6 (
>    EFI_STATUS                Status;
>    EFI_STATUS                TimerStatus;
>    EFI_DHCP6_PACKET_OPTION   *Oro;
>    EFI_DHCP6_RETRANSMISSION  InfoReqReXmit;
>    EFI_EVENT                 Timer;
> -  BOOLEAN                   MediaPresent;
> +  EFI_STATUS                MediaStatus;
> 
>    //
> -  // Check media status before doing DHCP.
> +  // Check media status, no more than 20 seconds
>    //
> -  MediaPresent = TRUE;
> -  NetLibDetectMedia (Controller, &MediaPresent);
> -  if (!MediaPresent) {
> +  MediaStatus = EFI_SUCCESS;
> +  NetLibDetectMediaWaitTimeout (Controller, EFI_TIMER_PERIOD_SECONDS(20),
> &MediaStatus);
> +  if (MediaStatus != EFI_SUCCESS) {
> +    AsciiPrint ("\n  Error: Could not detect network connection.\n");
>      return EFI_NO_MEDIA;
>    }
> 
>    //
>    // iSCSI will only request target info from DHCPv6 server.
> diff --git a/NetworkPkg/IScsiDxe/IScsiProto.c
> b/NetworkPkg/IScsiDxe/IScsiProto.c
> index 1602a26..ccdd5df 100644
> --- a/NetworkPkg/IScsiDxe/IScsiProto.c
> +++ b/NetworkPkg/IScsiDxe/IScsiProto.c
> @@ -442,18 +442,18 @@ IScsiSessionLogin (
>    EFI_STATUS        Status;
>    ISCSI_CONNECTION  *Conn;
>    VOID              *Tcp;
>    EFI_GUID          *ProtocolGuid;
>    UINT8             RetryCount;
> -  BOOLEAN           MediaPresent;
> +  EFI_STATUS        MediaStatus;
> 
>    //
>    // Check media status before session login.
>    //
> -  MediaPresent = TRUE;
> -  NetLibDetectMedia (Session->Private->Controller, &MediaPresent);
> -  if (!MediaPresent) {
> +  MediaStatus = EFI_SUCCESS;
> +  NetLibDetectMediaWaitTimeout (Session->Private->Controller,
> EFI_TIMER_PERIOD_SECONDS(20), &MediaStatus);
> +  if (MediaStatus != EFI_SUCCESS) {
>      return EFI_NO_MEDIA;
>    }
> 
>    //
>    // Set session identifier
> diff --git a/NetworkPkg/UefiPxeBcDxe/PxeBcImpl.c
> b/NetworkPkg/UefiPxeBcDxe/PxeBcImpl.c
> index ab9e494..7940cbe 100644
> --- a/NetworkPkg/UefiPxeBcDxe/PxeBcImpl.c
> +++ b/NetworkPkg/UefiPxeBcDxe/PxeBcImpl.c
> @@ -2345,11 +2345,11 @@ EfiPxeLoadFile (
>    PXEBC_PRIVATE_DATA          *Private;
>    PXEBC_VIRTUAL_NIC           *VirtualNic;
>    EFI_PXE_BASE_CODE_PROTOCOL  *PxeBc;
>    BOOLEAN                     UsingIpv6;
>    EFI_STATUS                  Status;
> -  BOOLEAN                     MediaPresent;
> +  EFI_STATUS                  MediaStatus;
> 
>    if (FilePath == NULL || !IsDevicePathEnd (FilePath)) {
>      return EFI_INVALID_PARAMETER;
>    }
> 
> @@ -2369,15 +2369,15 @@ EfiPxeLoadFile (
>    if (!BootPolicy) {
>      return EFI_UNSUPPORTED;
>    }
> 
>    //
> -  // Check media status before PXE start
> +  // Check media status before PXE start, wait no more than 20 seconds
>    //
> -  MediaPresent = TRUE;
> -  NetLibDetectMedia (Private->Controller, &MediaPresent);
> -  if (!MediaPresent) {
> +  MediaStatus = EFI_SUCCESS;
> +  NetLibDetectMediaWaitTimeout (Private->Controller,
> EFI_TIMER_PERIOD_SECONDS(20), &MediaStatus);
> +  if (MediaStatus != EFI_SUCCESS) {
>      return EFI_NO_MEDIA;
>    }
> 
>    //
>    // Check whether the virtual nic is using IPv6 or not.
> --
> 1.9.5.msysgit.1

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