On Wed, 17 Jan 2018 18:54:19 +0530 Gaurav Kohli <gkohli@xxxxxxxxxxxxxx> wrote: > There can be a race, if receive_buf call comes before > tty initialization completes in n_tty_open and tty->disc_data > may be NULL. > > CPU0 CPU1 > ---- ---- > 000|n_tty_receive_buf_common() n_tty_open() > -001|n_tty_receive_buf2() tty_ldisc_open.isra.3() > -002|tty_ldisc_receive_buf(inline) tty_ldisc_setup() > > Using ldisc semaphore lock in tty_init_dev till disc_data > initializes completely. > > Signed-off-by: Gaurav Kohli <gkohli@xxxxxxxxxxxxxx> Reviewed-by: Alan Cox <alan@xxxxxxxxxxxxxxx> Alan -- To unsubscribe from this list: send the line "unsubscribe linux-arm-msm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
