[cgutman] 54557: [NDIS] - Make NdisMAllocateSharedMemoryAsync and NdisMFreeSharedMemory safe to call at IRQL <= DISPATCH_LEVEL

Author: cgutman
Date: Thu Dec  1 22:31:54 2011
New Revision: 54557

URL: http://svn.reactos.org/svn/reactos?rev=54557&view=rev
Log:
[NDIS]
- Make NdisMAllocateSharedMemoryAsync and NdisMFreeSharedMemory safe to call at IRQL <= DISPATCH_LEVEL

Modified:
    trunk/reactos/drivers/network/ndis/include/miniport.h
    trunk/reactos/drivers/network/ndis/ndis/memory.c

Modified: trunk/reactos/drivers/network/ndis/include/miniport.h
URL: http://svn.reactos.org/svn/reactos/trunk/reactos/drivers/network/ndis/includ...
==============================================================================
--- trunk/reactos/drivers/network/ndis/include/miniport.h [iso-8859-1] (original)
+++ trunk/reactos/drivers/network/ndis/include/miniport.h [iso-8859-1] Thu Dec  1 22:31:54 2011
@@ -71,7 +71,7 @@
     BOOLEAN               Cached;
     PNDIS_MINIPORT_BLOCK  Adapter;
     PVOID                 Context;
-    PKEVENT               Event;
+    PIO_WORKITEM          WorkItem;
 } MINIPORT_SHARED_MEMORY, *PMINIPORT_SHARED_MEMORY;

/* A structure of WrapperConfigurationContext (not compatible with the

Modified: trunk/reactos/drivers/network/ndis/ndis/memory.c
URL: http://svn.reactos.org/svn/reactos/trunk/reactos/drivers/network/ndis/ndis/m...
==============================================================================
--- trunk/reactos/drivers/network/ndis/ndis/memory.c [iso-8859-1] (original)
+++ trunk/reactos/drivers/network/ndis/ndis/memory.c [iso-8859-1] Thu Dec  1 22:31:54 2011
@@ -188,6 +188,7 @@
 VOID
 NTAPI
 NdisMFreeSharedMemoryPassive(
+    PDEVICE_OBJECT DeviceObject,
     PVOID Context)
 /*
  * FUNCTION:  Free a common buffer
@@ -198,7 +199,6 @@
  */
 {
   PMINIPORT_SHARED_MEMORY Memory = (PMINIPORT_SHARED_MEMORY)Context;
-  PRKEVENT Event = Memory->Event;

NDIS_DbgPrint(MAX_TRACE, ("Called.\n"));

@@ -208,11 +208,8 @@
       Memory->AdapterObject, Memory->Length, Memory->PhysicalAddress,
       Memory->VirtualAddress, Memory->Cached);

+  IoFreeWorkItem(Memory->WorkItem);
   ExFreePool(Memory);
-
-  KeSetEvent(Event,
-             IO_NO_INCREMENT,
-             FALSE);
 }

@@ -240,10 +237,8 @@
  *       Therefore we have to do this in a worker thread.
  */
 {
-  HANDLE ThreadHandle;
   PLOGICAL_ADAPTER Adapter = (PLOGICAL_ADAPTER)MiniportAdapterHandle;
   PMINIPORT_SHARED_MEMORY Memory;
-  KEVENT Event;

NDIS_DbgPrint(MAX_TRACE,("Called.\n"));

@@ -257,8 +252,6 @@
       NDIS_DbgPrint(MIN_TRACE, ("Insufficient resources\n"));
       return;
     }
-
-  KeInitializeEvent(&Event, NotificationEvent, FALSE);

Memory->AdapterObject = Adapter->NdisMiniportBlock.SystemAdapterObject;
   Memory->Length = Length;
@@ -266,21 +259,25 @@
   Memory->VirtualAddress = VirtualAddress;
   Memory->Cached = Cached;
   Memory->Adapter = &Adapter->NdisMiniportBlock;
-  Memory->Event = &Event;
-
-  PsCreateSystemThread(&ThreadHandle, THREAD_ALL_ACCESS, 0, 0, 0, NdisMFreeSharedMemoryPassive, Memory);
-  ZwClose(ThreadHandle);
-
-  KeWaitForSingleObject(&Event,
-                        Executive,
-                        KernelMode,
-                        FALSE,
-                        NULL);
+
+  Memory->WorkItem = IoAllocateWorkItem(Adapter->NdisMiniportBlock.DeviceObject);
+  if (!Memory->WorkItem)
+  {
+      NDIS_DbgPrint(MIN_TRACE, ("Insufficient resources\n"));
+      ExFreePool(Memory);
+      return;
+  }
+
+  IoQueueWorkItem(Memory->WorkItem,
+                  NdisMFreeSharedMemoryPassive,
+                  CriticalWorkQueue,
+                  Memory);
 }

VOID
 NTAPI
 NdisMAllocateSharedMemoryPassive(
+    PDEVICE_OBJECT DeviceObject,
     PVOID Context)
 /*
  * FUNCTION:  Allocate a common buffer
@@ -304,6 +301,7 @@
              Memory->Adapter->MiniportAdapterContext, Memory->VirtualAddress, 
              &Memory->PhysicalAddress, Memory->Length, Memory->Context);

+  IoFreeWorkItem(Memory->WorkItem);
   ExFreePool(Memory);
 }

@@ -319,7 +317,6 @@
     IN  BOOLEAN     Cached,
     IN  PVOID       Context)
 {
-  HANDLE ThreadHandle;
   PLOGICAL_ADAPTER Adapter = (PLOGICAL_ADAPTER)MiniportAdapterHandle;
   PMINIPORT_SHARED_MEMORY Memory;

@@ -342,8 +339,18 @@
   Memory->Adapter = &Adapter->NdisMiniportBlock;
   Memory->Context = Context;

-  PsCreateSystemThread(&ThreadHandle, THREAD_ALL_ACCESS, 0, 0, 0, NdisMAllocateSharedMemoryPassive, Memory);
-  ZwClose(ThreadHandle);
+  Memory->WorkItem = IoAllocateWorkItem(Adapter->NdisMiniportBlock.DeviceObject);
+  if (!Memory->WorkItem)
+  {
+      NDIS_DbgPrint(MIN_TRACE, ("Insufficient resources\n"));
+      ExFreePool(Memory);
+      return NDIS_STATUS_FAILURE;
+  }
+
+  IoQueueWorkItem(Memory->WorkItem,
+                  NdisMAllocateSharedMemoryPassive,
+                  DelayedWorkQueue,
+                  Memory);

return NDIS_STATUS_PENDING;
 }