NetworkPkg/HttpBootDxe: Request HTTP token notify as a DPC at TPL_CALLBACK

This patch is to update the HTTP token notify as a DPC at
TPL_CALLBACK to align with UEFI Spec.

Cc: Hegde Nagaraj P <nagaraj-p.hegde@hpe.com>
Cc: Ye Ting <ting.ye@intel.com>
Cc: Fu Siyuan <siyuan.fu@intel.com>
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>
Reviewed-by: Sriram Subramanian <sriram-s@hpe.com>
Reviewed-by: Hegde Nagaraj P <nagaraj-p.hegde@hpe.com>

NetworkPkg/HttpBootDxe/HttpBootDxe.h

@@ -1,7 +1,7 @@
 /** @file
   UEFI HTTP boot driver's private data structure and interfaces declaration.
 
-Copyright (c) 2015 - 2016, Intel Corporation. All rights reserved.<BR>
+Copyright (c) 2015 - 2017, Intel Corporation. All rights reserved.<BR>
 (C) Copyright 2016 Hewlett Packard Enterprise Development LP<BR>
 This program and the accompanying materials are licensed and made available under 
 the terms and conditions of the BSD License that accompanies this distribution.  
@@ -36,6 +36,7 @@ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
 #include <Library/HttpLib.h>
 #include <Library/HiiLib.h>
 #include <Library/PrintLib.h>
+#include <Library/DpcLib.h>
 
 //
 // UEFI Driver Model Protocols

NetworkPkg/HttpBootDxe/HttpBootDxe.inf

@@ -60,6 +60,7 @@
   HttpLib
   HiiLib
   PrintLib
+  DpcLib
   UefiHiiServicesLib
   UefiBootManagerLib
 

NetworkPkg/HttpBootDxe/HttpBootSupport.c

@@ -624,6 +624,39 @@ HttpBootSetHeader (
   return EFI_SUCCESS;
 }
 
+/**
+  Notify the callback function when an event is triggered.
+
+  @param[in]  Context         The opaque parameter to the function.
+
+**/
+VOID
+HttpIoNotifyDpc (
+  IN VOID                *Context
+  )
+{
+  *((BOOLEAN *) Context) = TRUE;
+}
+
+/**
+  Request HttpIoNotifyDpc as a DPC at TPL_CALLBACK.
+
+  @param[in]  Event                 The event signaled.
+  @param[in]  Context               The opaque parameter to the function.
+
+**/
+VOID
+HttpIoNotify (
+  IN EFI_EVENT              Event,
+  IN VOID                   *Context
+  )
+{
+  //
+  // Request HttpIoNotifyDpc as a DPC at TPL_CALLBACK
+  //
+  QueueDpc (TPL_CALLBACK, HttpIoNotifyDpc, Context);
+}
+
 /**
   Create a HTTP_IO to access the HTTP service. It will create and configure
   a HTTP child handle.
@@ -730,7 +763,7 @@ HttpIoCreateIo (
   Status = gBS->CreateEvent (
                   EVT_NOTIFY_SIGNAL,
                   TPL_NOTIFY,
-                  HttpBootCommonNotify,
+                  HttpIoNotify,
                   &HttpIo->IsTxDone,
                   &Event
                   );
@@ -743,7 +776,7 @@ HttpIoCreateIo (
   Status = gBS->CreateEvent (
                   EVT_NOTIFY_SIGNAL,
                   TPL_NOTIFY,
-                  HttpBootCommonNotify,
+                  HttpIoNotify,
                   &HttpIo->IsRxDone,
                   &Event
                   );