Merge "BACKPORT: tty: Prevent ldisc drivers from re-using stale tty fields" (f8e333c5) · Commits · e / devices / samsung / android_kernel_samsung_msm8916

drivers/tty/tty_ldisc.c

+7 −0

Original line number	Diff line number	Diff line
		@@ -415,6 +415,10 @@ EXPORT_SYMBOL_GPL(tty_ldisc_flush);
		* they are not on hot paths so a little discipline won't do
		* any harm.
		*
		* The line discipline-related tty_struct fields are reset to
		* prevent the ldisc driver from re-using stale information for
		* the new ldisc instance.
		*
		* Locking: takes termios_mutex
		*/

		@@ -423,6 +427,9 @@ static void tty_set_termios_ldisc(struct tty_struct *tty, int num)
		mutex_lock(&tty->termios_mutex);
		tty->termios.c_line = num;
		mutex_unlock(&tty->termios_mutex);

		tty->disc_data = NULL;
		tty->receive_room = 0;
		}

		/**