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Subject[PATCH 15/35] n_gsm: use goto-failpaths in gsm_init
Date
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 <jslaby@suse.cz>
---
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
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