[pschweitzer] 65024: [FASTFAT] Acquire DirResource in DoQuery() before attempting to play with FCBs. This is dedicated to Thomas ; -)

Author: pschweitzer
Date: Sun Oct 26 18:48:30 2014
New Revision: 65024

URL: http://svn.reactos.org/svn/reactos?rev=65024&view=rev
Log:
[FASTFAT]
Acquire DirResource in DoQuery() before attempting to play with FCBs.

This is dedicated to Thomas ;-)

Modified:
    trunk/reactos/drivers/filesystems/fastfat/dir.c

Modified: trunk/reactos/drivers/filesystems/fastfat/dir.c
URL: http://svn.reactos.org/svn/reactos/trunk/reactos/drivers/filesystems/fastfat...
==============================================================================
--- trunk/reactos/drivers/filesystems/fastfat/dir.c	[iso-8859-1] (original)
+++ trunk/reactos/drivers/filesystems/fastfat/dir.c	[iso-8859-1] Sun Oct 26 18:48:30 2014
@@ -504,6 +504,13 @@
     DirContext.ShortNameU.Buffer = ShortNameBuffer;
     DirContext.ShortNameU.MaximumLength = sizeof(ShortNameBuffer);

+    if (!ExAcquireResourceExclusiveLite(&IrpContext->DeviceExt->DirResource,
+                                        (BOOLEAN)(IrpContext->Flags & IRPCONTEXT_CANWAIT)))
+    {
+        ExReleaseResourceLite(&pFcb->MainResource);
+        return VfatQueueRequest(IrpContext);
+    }
+
     while ((Status == STATUS_SUCCESS) && (BufferLength > 0))
     {
         Status = FindFile(IrpContext->DeviceExt,
@@ -579,6 +586,7 @@
         IrpContext->Irp->IoStatus.Information = Stack->Parameters.QueryDirectory.Length - BufferLength;
     }

+    ExReleaseResourceLite(&IrpContext->DeviceExt->DirResource);
     ExReleaseResourceLite(&pFcb->MainResource);

return Status;