staging: dgnc: remove redundant variable null check

The unit struct(un_t) was not used in dgnc_tty_hangup().

Signed-off-by: Daeseok Youn <daeseok.youn@gmail.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 1387041..b33b07c 100644 (file)
--- a/drivers/staging/dgnc/dgnc_tty.c
+++ b/drivers/staging/dgnc/dgnc_tty.c
@@ -1289,15 +1289,9 @@ static int dgnc_block_til_ready(struct tty_struct *tty,
  */
 static void dgnc_tty_hangup(struct tty_struct *tty)
 {
-       struct un_t     *un;
-
        if (!tty || tty->magic != TTY_MAGIC)
                return;
 
-       un = tty->driver_data;
-       if (!un || un->magic != DGNC_UNIT_MAGIC)
-               return;
-
        /* flush the transmit queues */
        dgnc_tty_flush_buffer(tty);
 }