TTY: use tty_wait_until_sent_from_close in tty_port_close_start
Let's use the newly added helper to avoid stalls in drivers which are already ported to tty_port helpers. We have to ensure here, that there is no user of tty_port_close_start and tty_port_close which holds port->mutex (or other) lock over them. And sure, there is none. Signed-off-by: Jiri Slaby <jslaby@suse.cz> Acked-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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@ -350,7 +350,7 @@ int tty_port_close_start(struct tty_port *port,
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tty_driver_flush_buffer(tty);
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if (test_bit(ASYNCB_INITIALIZED, &port->flags) &&
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port->closing_wait != ASYNC_CLOSING_WAIT_NONE)
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tty_wait_until_sent(tty, port->closing_wait);
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tty_wait_until_sent_from_close(tty, port->closing_wait);
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if (port->drain_delay) {
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unsigned int bps = tty_get_baud_rate(tty);
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long timeout;
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