TTY: ehv_bytechan: add missing platform_driver_unregister() when module exit

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

Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/tty/ehv_bytechan.c b/drivers/tty/ehv_bytechan.c
index 6d0c27cd03da2676b91bfef307482a83be765697..9bffcec5ad82a4bcf0f05e3a89c73cf0b62433dc 100644 (file)
--- 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);