> > Would something like this tick that box? > > > > diff --git a/drivers/tty/n_gsm.c b/drivers/tty/n_gsm.c index > > 1f3aba607cd51..5c1d2fcd5d9e2 100644 > > --- a/drivers/tty/n_gsm.c > > +++ b/drivers/tty/n_gsm.c > > @@ -3716,6 +3716,10 @@ static ssize_t gsmld_write(struct tty_struct *tty, struct file *file, > > if (!gsm) > > return -ENODEV; > > > > + /* The GSM line discipline does not support binding to console */ > > + if (strncmp(tty->name, "tty", 3)) > > + return -EINVAL; > > No, that's not going to work, some consoles do not start with "tty" :( Also, I would recommend exiting as early as possible. E.g. in gsmld_open(). And please retain support for real serial devices (e.g. ttyS, ttyUSB, ttyACM, ...). Best regards, Daniel Starke
