staging: remove unnecessary code

Compile tested.
remove unnecessary code that matches this coccinelle pattern
	if (...)
		return ret;
	return ret;

Signed-off-by: Greg Dietsche <Gregory.Dietsche@cuw.edu>
Acked-by: Franky Lin <frankyl@broadcom.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
diff --git a/drivers/staging/comedi/comedi_fops.c b/drivers/staging/comedi/comedi_fops.c
index e7e72b8..15a209f 100644
--- a/drivers/staging/comedi/comedi_fops.c
+++ b/drivers/staging/comedi/comedi_fops.c
@@ -1291,10 +1291,10 @@
 		s->lock = file;
 	spin_unlock_irqrestore(&s->spin_lock, flags);
 
+#if 0
 	if (ret < 0)
 		return ret;
 
-#if 0
 	if (s->lock_f)
 		ret = s->lock_f(dev, s);
 #endif