4.15-stable review patch. If anyone has any objections, please let me know.
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From: Sebastian Andrzej Siewior bigeasy@linutronix.de
commit 714569064adee3c114a2a6490735b94abe269068 upstream.
This is a followup on 44117a1d1732 ("serial: core: mark port as initialized after successful IRQ change"). Nikola has been using autoconfig via setserial and reported a crash similar to what I fixed in the earlier mentioned commit. Here I do the same fixup for the autoconfig. I wasn't sure that this is the right approach. Nikola confirmed that it fixes his crash.
Fixes: b3b576461864 ("tty: serial_core: convert uart_open to use tty_port_open") Link: http://lkml.kernel.org/r/20180131072000.GD1853@localhost.localdomain Reported-by: Nikola Ciprich nikola.ciprich@linuxbox.cz Tested-by: Nikola Ciprich nikola.ciprich@linuxbox.cz Cc: stable@vger.kernel.org Signed-off-by: Sebastian Andrzej Siewior bigeasy@linutronix.de Tested-by: Nikola Ciprich nikola.ciprich@linuxbox.cz Acked-by: Johan Hovold johan@kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- drivers/tty/serial/serial_core.c | 2 ++ 1 file changed, 2 insertions(+)
--- a/drivers/tty/serial/serial_core.c +++ b/drivers/tty/serial/serial_core.c @@ -1144,6 +1144,8 @@ static int uart_do_autoconfig(struct tty uport->ops->config_port(uport, flags);
ret = uart_startup(tty, state, 1); + if (ret == 0) + tty_port_set_initialized(port, true); if (ret > 0) ret = 0; }