Re: [PATCH] tty: fix race between flush_to_ldisc and tty_open

Hi Li, Thank you for the patch! Yet something to improve: [auto build test ERROR on tty/tty-testing] [also build test ERROR on v4.20-rc7 next-20181221] [if your patch is applied to the wrong git tree, please drop us a note to help improve the system] url: https://github.com/0day-ci/linux/co

[PATCH] tty: fix race between flush_to_ldisc and tty_open

There still can be a race after the commit b027e2298bd588 ("tty: fix data race between tty_init_dev and flush of buf"), if receive_buf call comes before tty initialization completes in n_tty_open and tty->driver_data may be NULL. CPU0CPU1