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-rw-r--r--sound/usb/usx2y/us122l.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/sound/usb/usx2y/us122l.c b/sound/usb/usx2y/us122l.c
index d0323a693ba2..999550bbad40 100644
--- a/sound/usb/usx2y/us122l.c
+++ b/sound/usb/usx2y/us122l.c
@@ -262,7 +262,9 @@ static int usb_stream_hwdep_mmap(struct snd_hwdep *hw,
}
area->vm_ops = &usb_stream_hwdep_vm_ops;
- area->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP;
+ area->vm_flags |= VM_DONTDUMP;
+ if (!read)
+ area->vm_flags |= VM_DONTEXPAND;
area->vm_private_data = us122l;
atomic_inc(&us122l->mmap_count);
out: