greybus: uart: remove the redundant unregister chrdev

The unregister_chrdev_region() does twice here.
The chrdev region was unregistered
inside tty_unregister_driver().

Signed-off-by: Phong Tran <tranmanphong@gmail.com>
Reviewed-by: Alex Elder <elder@linaro.org>
Reviewed-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>

diff --git a/drivers/staging/greybus/uart.c b/drivers/staging/greybus/uart.c
index 6db4993..7e94632 100644 (file)
--- a/drivers/staging/greybus/uart.c
+++ b/drivers/staging/greybus/uart.c
@@ -732,12 +732,8 @@ fail_unregister_dev:
 
 static void gb_tty_exit(void)
 {
-       int major = MAJOR(gb_tty_driver->major);
-       int minor = gb_tty_driver->minor_start;
-
        tty_unregister_driver(gb_tty_driver);
        put_tty_driver(gb_tty_driver);
-       unregister_chrdev_region(MKDEV(major, minor), GB_NUM_MINORS);
 }
 
 static struct gb_protocol uart_protocol = {