Re: [PATCH 3/4] tty: Abstract and encapsulate tty->closing behavior

[Johannes Stezenbach]

On Sun, Nov 08, 2015 at 05:02:52PM -0500, Peter Hurley wrote:
> +void tty_ldisc_closing(struct tty_struct *tty)
> +{
> +	struct tty_ldisc *ld = tty_ldisc_ref(tty);
> +
> +	if (ld->ops->closing)
> +		ld->ops->closing(tty);
> +	if (ld)
> +		tty_ldisc_deref(ld);
> +}

That looks strange.  Do you need to check ld _before_ dereferencing?

Johannes
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