Re: [PATCH 1/6] tty: implement write_iter

[Linus Torvalds]

On Thu, Jan 21, 2021 at 1:40 AM Jiri Slaby <jirislaby@xxxxxxxxxx> wrote:
>
> Ok, here belongs my earlier note: "if ld == NULL => crash here." That is
> if hangup happens during the ldisc wait, the kernel will crash in
> tty_ldisc_deref.

Right you are, good catch.

> Is there a reason not to convert hung_up_tty_fops too and leave the
> return hung_up_tty_write here intact? This would also solve the comments
> above.

No, no reason. I started out just changing that one tty_write, then
noticed that I had to change the redirect case too, but never then got
to "yeah, I should have changed the hup case as well".

Greg, do you prefer a new series, or incremental patches?

               Linus