[PATCH 15/35] n_gsm: use goto-failpaths in gsm_init
From: Jiri Slaby <hidden>
Date: 2021-05-05 09:20:24
Also in:
lkml
Subsystem:
the rest, tty layer and serial drivers · Maintainers:
Linus Torvalds, Greg Kroah-Hartman, Jiri Slaby
Use the classic failpath handling using gotos in gsm_init. That way, tty_unregister_ldisc needs not be repeated on two places. Signed-off-by: Jiri Slaby <redacted> --- drivers/tty/n_gsm.c | 14 +++++++++----- 1 file changed, 9 insertions(+), 5 deletions(-)
diff --git a/drivers/tty/n_gsm.c b/drivers/tty/n_gsm.c
index 654e439ff6c8..cce2ef04caeb 100644
--- a/drivers/tty/n_gsm.c
+++ b/drivers/tty/n_gsm.c@@ -3252,9 +3252,9 @@ static int __init gsm_init(void) gsm_tty_driver = alloc_tty_driver(256); if (!gsm_tty_driver) { - tty_unregister_ldisc(N_GSM0710); pr_err("gsm_init: tty allocation failed.\n"); - return -EINVAL; + status = -ENOMEM; + goto err_unreg_ldisc; } gsm_tty_driver->driver_name = "gsmtty"; gsm_tty_driver->name = "gsmtty";
@@ -3270,14 +3270,18 @@ static int __init gsm_init(void) tty_set_operations(gsm_tty_driver, &gsmtty_ops); if (tty_register_driver(gsm_tty_driver)) { - put_tty_driver(gsm_tty_driver); - tty_unregister_ldisc(N_GSM0710); pr_err("gsm_init: tty registration failed.\n"); - return -EBUSY; + status = -EBUSY; + goto err_put_driver; } pr_debug("gsm_init: loaded as %d,%d.\n", gsm_tty_driver->major, gsm_tty_driver->minor_start); return 0; +err_put_driver: + put_tty_driver(gsm_tty_driver); +err_unreg_ldisc: + tty_unregister_ldisc(N_GSM0710); + return status; } static void __exit gsm_exit(void)
--
2.31.1