Merge remote-tracking branches 'spi/topic/img-spfi', 'spi/topic/imx', 'spi/topic...

[firefly-linux-kernel-4.4.55.git] / drivers / tty / n_tty.c

diff --git a/drivers/tty/n_tty.c b/drivers/tty/n_tty.c
index d2b496750d590c1e06d755b0b563f40c30f8d165..4ddfa60c922205513d16ed74a770eefd111fda83 100644 (file)
--- a/drivers/tty/n_tty.c
+++ b/drivers/tty/n_tty.c
@@ -2399,17 +2399,12 @@ static unsigned int n_tty_poll(struct tty_struct *tty, struct file *file,
 
        poll_wait(file, &tty->read_wait, wait);
        poll_wait(file, &tty->write_wait, wait);
-       if (test_bit(TTY_OTHER_CLOSED, &tty->flags))
-               mask |= POLLHUP;
        if (input_available_p(tty, 1))
                mask |= POLLIN | POLLRDNORM;
-       else if (mask & POLLHUP) {
-               tty_flush_to_ldisc(tty);
-               if (input_available_p(tty, 1))
-                       mask |= POLLIN | POLLRDNORM;
-       }
        if (tty->packet && tty->link->ctrl_status)
                mask |= POLLPRI | POLLIN | POLLRDNORM;
+       if (test_bit(TTY_OTHER_CLOSED, &tty->flags))
+               mask |= POLLHUP;
        if (tty_hung_up_p(file))
                mask |= POLLHUP;
        if (!(mask & (POLLHUP | POLLIN | POLLRDNORM))) {