From d1c2395c8be0ce4c8a40d077b73c5c9ebf0eb134 Mon Sep 17 00:00:00 2001
From: Johannes Anderwald <johannes.anderwald@reactos.org>
Date: Wed, 31 Jul 2013 18:21:24 +0000
Subject: [PATCH] [LIBUSB] - Perform intialization of root hub in a worker
 thread - Should help ReactOS to continue booting when an usb controller
 causes hangs

svn path=/trunk/; revision=59605
---
 reactos/lib/drivers/libusb/hub_controller.cpp | 47 ++++++++++++++++++-
 reactos/lib/drivers/libusb/libusb.h           |  8 ++++
 2 files changed, 53 insertions(+), 2 deletions(-)

diff --git a/reactos/lib/drivers/libusb/hub_controller.cpp b/reactos/lib/drivers/libusb/hub_controller.cpp
index 62c1f3762d9..eef9b72855e 100644
--- a/reactos/lib/drivers/libusb/hub_controller.cpp
+++ b/reactos/lib/drivers/libusb/hub_controller.cpp
@@ -3351,6 +3351,31 @@ USBHI_Initialize20Hub(
     return STATUS_SUCCESS;
 }
 
+
+WORKER_THREAD_ROUTINE InitRootHub;
+
+VOID
+NTAPI
+InitRootHub(IN PVOID Context)
+{
+    PINIT_ROOT_HUB_CONTEXT WorkItem;
+
+    //
+    // get context
+    //
+    WorkItem = (PINIT_ROOT_HUB_CONTEXT)Context;
+
+    //
+    // perform callback
+    //
+    WorkItem->CallbackRoutine(WorkItem->CallbackContext);
+
+    //
+    // free contextg
+    //
+    ExFreePoolWithTag(Context, TAG_USBLIB);
+}
+
 NTSTATUS
 USB_BUSIFFN
 USBHI_RootHubInitNotification(
@@ -3359,6 +3384,7 @@ USBHI_RootHubInitNotification(
     PRH_INIT_CALLBACK CallbackRoutine)
 {
     CHubController * Controller;
+    PINIT_ROOT_HUB_CONTEXT WorkItem;
 
     DPRINT("USBHI_RootHubInitNotification %p \n", CallbackContext);
 
@@ -3374,9 +3400,26 @@ USBHI_RootHubInitNotification(
     Controller->SetNotification(CallbackContext, CallbackRoutine);
 
     //
-    // FIXME: determine when to perform callback
+    // Create and initialize work item data
     //
-    CallbackRoutine(CallbackContext);
+    WorkItem = (PINIT_ROOT_HUB_CONTEXT)ExAllocatePoolWithTag(NonPagedPool, sizeof(INIT_ROOT_HUB_CONTEXT), TAG_USBLIB);
+    if (!WorkItem)
+    {
+        DPRINT1("Failed to allocate memory!n");
+        return STATUS_INSUFFICIENT_RESOURCES;
+    }
+
+    //
+    // init context
+    //
+    WorkItem->CallbackRoutine = CallbackRoutine;
+    WorkItem->CallbackContext = CallbackContext;
+
+    //
+    // Queue the work item to handle initializing the device
+    //
+    ExInitializeWorkItem(&WorkItem->WorkItem, InitRootHub, (PVOID)WorkItem);
+    ExQueueWorkItem(&WorkItem->WorkItem, DelayedWorkQueue);
 
     //
     // done
diff --git a/reactos/lib/drivers/libusb/libusb.h b/reactos/lib/drivers/libusb/libusb.h
index 568157fcc7c..1fd96b17f38 100644
--- a/reactos/lib/drivers/libusb/libusb.h
+++ b/reactos/lib/drivers/libusb/libusb.h
@@ -52,6 +52,14 @@ typedef struct
     PDISPATCHIRP Dispatcher;                                     // dispatches the code
 }COMMON_DEVICE_EXTENSION, *PCOMMON_DEVICE_EXTENSION;
 
+
+typedef struct _WORK_ITEM_DATA
+{
+    WORK_QUEUE_ITEM WorkItem;                                   // work item
+    PVOID CallbackContext;                                      // callback context
+    PRH_INIT_CALLBACK CallbackRoutine;                          // callback routine
+} INIT_ROOT_HUB_CONTEXT, *PINIT_ROOT_HUB_CONTEXT;
+
 //
 // tag for allocations
 //