From 65169e1f54e8cee5bfbb6632fabd7457c740933e Mon Sep 17 00:00:00 2001
From: Johannes Anderwald <johannes.anderwald@reactos.org>
Date: Mon, 7 Jun 2010 23:00:04 +0000
Subject: [PATCH] [WDMAUD_KERNEL] - Extend the mdl hack

svn path=/trunk/; revision=47687
---
 reactos/drivers/wdm/audio/legacy/wdmaud/control.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/reactos/drivers/wdm/audio/legacy/wdmaud/control.c b/reactos/drivers/wdm/audio/legacy/wdmaud/control.c
index 07e9ef846d2..4fc1d673c1c 100644
--- a/reactos/drivers/wdm/audio/legacy/wdmaud/control.c
+++ b/reactos/drivers/wdm/audio/legacy/wdmaud/control.c
@@ -457,15 +457,16 @@ WdmAudReadWrite(
         Status = KsProbeStreamIrp(Irp, KSPROBE_STREAMREAD | KSPROBE_ALLOCATEMDL | KSPROBE_PROBEANDLOCK, Length);
     }
 
-    /* now free the mdl */
-    IoFreeMdl(Mdl);
-
     if (!NT_SUCCESS(Status))
     {
         DPRINT1("KsProbeStreamIrp failed with Status %x Cancel %u\n", Status, Irp->Cancel);
+        Irp->MdlAddress = Mdl;
         return SetIrpIoStatus(Irp, Status, 0);
     }
 
+    /* now free the mdl */
+    IoFreeMdl(Mdl);
+
     /* get device info */
     DeviceInfo = (PWDMAUD_DEVICE_INFO)Irp->AssociatedIrp.SystemBuffer;
     ASSERT(DeviceInfo);