MdeModulePkg: Fix DHCP4 driver hang issue in some case.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Wu Jiaxin <jiaxin.wu@intel.com>
Reviewed-by: Ye Ting <ting.ye@intel.com>
Reviewed-by: Fu Siyuan <siyuan.fu@intel.com>

git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@17653 6f19259b-4bc3-4df7-8a09-765794883524

1 files changed, 14 insertions, 1 deletions

diff --git a/MdeModulePkg/Universal/Network/Dhcp4Dxe/Dhcp4Driver.c b/MdeModulePkg/Universal/Network/Dhcp4Dxe/Dhcp4Driver.c
index d1bba30..9253df2 100644
--- a/MdeModulePkg/Universal/Network/Dhcp4Dxe/Dhcp4Driver.c
+++ b/MdeModulePkg/Universal/Network/Dhcp4Dxe/Dhcp4Driver.c
@@ -1,6 +1,6 @@
 /** @file

 

-Copyright (c) 2006 - 2012, Intel Corporation. All rights reserved.<BR>

+Copyright (c) 2006 - 2015, Intel Corporation. All rights reserved.<BR>

 This program and the accompanying materials

 are licensed and made available under the terms and conditions of the BSD License

 which accompanies this distribution.  The full text of the license may be found at

@@ -718,6 +718,19 @@ Dhcp4ServiceBindingDestroyChild (
   RemoveEntryList (&Instance->Link);

   DhcpSb->NumChildren--;

 

+  if (Instance->UdpIo != NULL) {

+    UdpIoCleanIo (Instance->UdpIo);

+    gBS->CloseProtocol (

+           Instance->UdpIo->UdpHandle,

+           &gEfiUdp4ProtocolGuid,

+           Instance->Service->Image,

+           Instance->Handle

+           );

+    UdpIoFreeIo (Instance->UdpIo);

+    Instance->UdpIo = NULL;

+    Instance->Token = NULL;

+  }

+

   gBS->RestoreTPL (OldTpl);

 

   FreePool (Instance);