From 978a879fe90c76fa1ef27389eb76275a13040649 Mon Sep 17 00:00:00 2001
From: Art Yerkes <art.yerkes@gmail.com>
Date: Sat, 23 Aug 2008 23:04:15 +0000
Subject: [PATCH] Catch failure to release the cancel spinlock.  Would've
 spotted my error in tcpip.sys.

svn path=/trunk/; revision=35581
---
 reactos/ntoskrnl/io/iomgr/irp.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/reactos/ntoskrnl/io/iomgr/irp.c b/reactos/ntoskrnl/io/iomgr/irp.c
index 0f7b11e19f1..d9e6b9ebe6a 100644
--- a/reactos/ntoskrnl/io/iomgr/irp.c
+++ b/reactos/ntoskrnl/io/iomgr/irp.c
@@ -970,12 +970,14 @@ NTAPI
 IoCancelIrp(IN PIRP Irp)
 {
     KIRQL OldIrql;
+    KIRQL IrqlAtEntry;
     PDRIVER_CANCEL CancelRoutine;
     IOTRACE(IO_IRP_DEBUG,
             "%s - Canceling IRP %p\n",
             __FUNCTION__,
             Irp);
     ASSERT(Irp->Type == IO_TYPE_IRP);
+    IrqlAtEntry = KeGetCurrentIrql();
 
     /* Acquire the cancel lock and cancel the IRP */
     IoAcquireCancelSpinLock(&OldIrql);
@@ -999,6 +1001,7 @@ IoCancelIrp(IN PIRP Irp)
         /* Set the cancel IRQL And call the routine */
         Irp->CancelIrql = OldIrql;
         CancelRoutine(IoGetCurrentIrpStackLocation(Irp)->DeviceObject, Irp);
+	ASSERT(IrqlAtEntry == KeGetCurrentIrql());
         return TRUE;
     }