[PATCH] TTY: ehv_bytechan: add missing platform_driver_unregister() when module exit

[Wei Yongjun]

From: Wei Yongjun <yongjun_wei at trendmicro.com.cn>

We have registered platform driver when module init, and
need unregister it when module exit.

Signed-off-by: Wei Yongjun <yongjun_wei at trendmicro.com.cn>
---
no compile test.
---
 drivers/tty/ehv_bytechan.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/tty/ehv_bytechan.c b/drivers/tty/ehv_bytechan.c
index 6d0c27c..9bffcec 100644
--- a/drivers/tty/ehv_bytechan.c
+++ b/drivers/tty/ehv_bytechan.c
@@ -859,6 +859,7 @@ error:
  */
 static void __exit ehv_bc_exit(void)
 {
+	platform_driver_unregister(&ehv_bc_tty_driver);
 	tty_unregister_driver(ehv_bc_driver);
 	put_tty_driver(ehv_bc_driver);
 	kfree(bcs);