Re: [PATCH v2] tty: Fix WARNING in tty_set_termios()

[Johan Hovold]

On Fri, Feb 01, 2019 at 10:28:43AM +0100, Johan Hovold wrote:
> On Thu, Jan 31, 2019 at 04:23:59PM -0700, Shuah Khan wrote:
> > tty_set_termios() has the following WARN_ON which can be triggered with a
> > syscall to invoke TIOCSETD __NR_ioctl.
> 
> That's the only way to set the hci line discipline. And it's the
> consequent ioctl that sets the uart protocol that triggers the warning,

I meant *subsequent* ioctl, of course.

> but only if the tty is a pty master, as I mentioned before.

Johan