diff options
Diffstat (limited to 'drivers/tty/n_gsm.c')
| -rw-r--r-- | drivers/tty/n_gsm.c | 14 |
1 files changed, 12 insertions, 2 deletions
diff --git a/drivers/tty/n_gsm.c b/drivers/tty/n_gsm.c index d60cffc70a0c..2514d529f5f3 100644 --- a/drivers/tty/n_gsm.c +++ b/drivers/tty/n_gsm.c @@ -2384,8 +2384,18 @@ static int gsmld_attach_gsm(struct tty_struct *tty, struct gsm_mux *gsm) /* Don't register device 0 - this is the control channel and not a usable tty interface */ base = mux_num_to_base(gsm); /* Base for this MUX */ - for (i = 1; i < NUM_DLCI; i++) - tty_register_device(gsm_tty_driver, base + i, NULL); + for (i = 1; i < NUM_DLCI; i++) { + struct device *dev; + + dev = tty_register_device(gsm_tty_driver, + base + i, NULL); + if (IS_ERR(dev)) { + for (i--; i >= 1; i--) + tty_unregister_device(gsm_tty_driver, + base + i); + return PTR_ERR(dev); + } + } } return ret; } |