diff --git a/drivers/staging/comedi/comedidev.h b/drivers/staging/comedi/comedidev.h
index a5d479c1266e..d07d47f5db81 100644
--- a/drivers/staging/comedi/comedidev.h
+++ b/drivers/staging/comedi/comedidev.h
@@ -108,8 +108,6 @@ struct comedi_buf_map {
 };
 
 struct comedi_async {
-	struct comedi_subdevice *subdevice;
-
 	void *prealloc_buf;	/* pre-allocated buffer */
 	unsigned int prealloc_bufsz;	/* buffer size, in bytes */
 	struct comedi_buf_map *buf_map;	/* map of buffer pages */
diff --git a/drivers/staging/comedi/drivers.c b/drivers/staging/comedi/drivers.c
index cb5d21411a0c..299726f39e26 100644
--- a/drivers/staging/comedi/drivers.c
+++ b/drivers/staging/comedi/drivers.c
@@ -307,7 +307,6 @@ static int __comedi_device_postconfig_async(struct comedi_device *dev,
 		return -ENOMEM;
 
 	init_waitqueue_head(&async->wait_head);
-	async->subdevice = s;
 	s->async = async;
 
 	async->max_bufsize = comedi_default_buf_maxsize_kb * 1024;