1 files changed, 1 insertions, 1 deletions

diff --git a/sound/usb/usx2y/usx2yhwdeppcm.c b/sound/usb/usx2y/usx2yhwdeppcm.c
index 800b5cecfc80..117946f2debb 100644
--- a/sound/usb/usx2y/usx2yhwdeppcm.c
+++ b/sound/usb/usx2y/usx2yhwdeppcm.c
@@ -722,7 +722,7 @@ static int snd_usX2Y_hwdep_pcm_mmap(struct snd_hwdep * hw, struct file *filp, st
                 return -ENODEV;
         }
         area->vm_ops = &snd_usX2Y_hwdep_pcm_vm_ops;
-        area->vm_flags |= VM_RESERVED;
+        area->vm_flags |= VM_RESERVED | VM_DONTEXPAND;
         area->vm_private_data = hw->private_data;
         return 0;
 }