staging: dgnc: simplify a trivial if-return sequence

Signed-off-by: Parshuram Thombare <thombarepr@yahoo.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/drivers/staging/dgnc/dgnc_tty.c b/drivers/staging/dgnc/dgnc_tty.c
index 8489e5a..4ac9092 100644
--- a/drivers/staging/dgnc/dgnc_tty.c
+++ b/drivers/staging/dgnc/dgnc_tty.c
@@ -1336,10 +1336,7 @@
 
 	spin_unlock_irqrestore(&ch->ch_lock, flags);
 
-	if (retval)
-		return retval;
-
-	return 0;
+	return retval;
 }
 
 /*