[PATCH 5/9] staging: dgap: introduce dgap_tty_unregister()

[Daeseok Youn <daeseok.youn@xxxxxxxxx>]

dgap_tty_unregister() will unregister serial_driver
and print_driver, and also free related variables.

Signed-off-by: Daeseok Youn <daeseok.youn@xxxxxxxxx>
---
 drivers/staging/dgap/dgap.c |    9 +++++++++
 1 files changed, 9 insertions(+), 0 deletions(-)

diff --git a/drivers/staging/dgap/dgap.c b/drivers/staging/dgap/dgap.c
index 497e6f3..4ea7a33 100644
--- a/drivers/staging/dgap/dgap.c
+++ b/drivers/staging/dgap/dgap.c
@@ -122,6 +122,7 @@ static int dgap_tty_put_char(struct tty_struct *tty, unsigned char c);
 static void dgap_tty_send_xchar(struct tty_struct *tty, char ch);
 
 static int dgap_tty_register(struct board_t *brd);
+static void dgap_tty_unregister(struct board_t *brd);
 static int dgap_tty_init(struct board_t *);
 static void dgap_tty_free(struct board_t *);
 static void dgap_cleanup_tty(struct board_t *);
@@ -1320,6 +1321,14 @@ free_serial_drv:
 	return rc;
 }
 
+static void dgap_tty_unregister(struct board_t *brd)
+{
+	tty_unregister_driver(brd->print_driver);
+	tty_unregister_driver(brd->serial_driver);
+	put_tty_driver(brd->print_driver);
+	put_tty_driver(brd->serial_driver);
+}
+
 /*
  * dgap_tty_init()
  *
-- 
1.7.1

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