diff options
author | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-12-11 10:41:08 +0300 |
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committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-12-11 10:41:08 +0300 |
commit | 42e64571d516ef761d9f330c80493637cbf3bdda (patch) | |
tree | 5f3df1c06c2d571efa5fd72d0c8022a80140eec2 /drivers/tty/serdev | |
parent | b8f3bff057b017309fbd61fe74712b1f185b5399 (diff) | |
parent | 50c4c4e268a2d7a3e58ebb698ac74da0de40ae36 (diff) |
Merge 4.15-rc3 into tty-next
We want the serial/tty fixes in here as well.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/tty/serdev')
-rw-r--r-- | drivers/tty/serdev/serdev-ttyport.c | 26 |
1 files changed, 23 insertions, 3 deletions
diff --git a/drivers/tty/serdev/serdev-ttyport.c b/drivers/tty/serdev/serdev-ttyport.c index 75f312ed96e8..c2629ab1bbcf 100644 --- a/drivers/tty/serdev/serdev-ttyport.c +++ b/drivers/tty/serdev/serdev-ttyport.c @@ -27,23 +27,41 @@ static int ttyport_receive_buf(struct tty_port *port, const unsigned char *cp, { struct serdev_controller *ctrl = port->client_data; struct serport *serport = serdev_controller_get_drvdata(ctrl); + int ret; if (!test_bit(SERPORT_ACTIVE, &serport->flags)) return 0; - return serdev_controller_receive_buf(ctrl, cp, count); + ret = serdev_controller_receive_buf(ctrl, cp, count); + + dev_WARN_ONCE(&ctrl->dev, ret < 0 || ret > count, + "receive_buf returns %d (count = %zu)\n", + ret, count); + if (ret < 0) + return 0; + else if (ret > count) + return count; + + return ret; } static void ttyport_write_wakeup(struct tty_port *port) { struct serdev_controller *ctrl = port->client_data; struct serport *serport = serdev_controller_get_drvdata(ctrl); + struct tty_struct *tty; + + tty = tty_port_tty_get(port); + if (!tty) + return; - if (test_and_clear_bit(TTY_DO_WRITE_WAKEUP, &port->tty->flags) && + if (test_and_clear_bit(TTY_DO_WRITE_WAKEUP, &tty->flags) && test_bit(SERPORT_ACTIVE, &serport->flags)) serdev_controller_write_wakeup(ctrl); - wake_up_interruptible_poll(&port->tty->write_wait, POLLOUT); + wake_up_interruptible_poll(&tty->write_wait, POLLOUT); + + tty_kref_put(tty); } static const struct tty_port_client_operations client_ops = { @@ -139,8 +157,10 @@ static void ttyport_close(struct serdev_controller *ctrl) clear_bit(SERPORT_ACTIVE, &serport->flags); + tty_lock(tty); if (tty->ops->close) tty->ops->close(tty, NULL); + tty_unlock(tty); tty_release_struct(tty, serport->tty_idx); } |