X-Git-Url: https://git.reactos.org/?p=reactos.git;a=blobdiff_plain;f=reactos%2Fdrivers%2Ffilesystems%2Ffastfat%2Ffsctl.c;h=e27f8e868af6333916e173e690a92ecacbcf4b33;hp=ab9d3afae2f17e3de2adebfd0af3c352b8641a71;hb=0ca2bff44e1f9c84dd218a07e21628da464cfd82;hpb=86e82138e791333605e390bf4cedd36d1d79ca15

diff --git a/reactos/drivers/filesystems/fastfat/fsctl.c b/reactos/drivers/filesystems/fastfat/fsctl.c
index ab9d3afae2f..e27f8e868af 100644
--- a/reactos/drivers/filesystems/fastfat/fsctl.c
+++ b/reactos/drivers/filesystems/fastfat/fsctl.c
@@ -865,14 +865,16 @@ VfatLockOrUnlockVolume(
 {
     PFILE_OBJECT FileObject;
     PDEVICE_EXTENSION DeviceExt;
+    PVFATFCB Fcb;
 
     DPRINT("VfatLockOrUnlockVolume(%p, %d)\n", IrpContext, Lock);
 
     DeviceExt = IrpContext->DeviceExt;
     FileObject = IrpContext->FileObject;
+    Fcb = FileObject->FsContext;
 
     /* Only allow locking with the volume open */
-    if (FileObject->FsContext != DeviceExt->VolumeFcb)
+    if (!(Fcb->Flags & FCB_IS_VOLUME))
     {
         return STATUS_ACCESS_DENIED;
     }