From c58caaab3bf87a6470c1a4641ea7fa5192e12bdd Mon Sep 17 00:00:00 2001 From: Alexander Sverdlin Date: Fri, 13 Jul 2018 17:01:19 +0200 Subject: serial: 8250: of: Defer probe on missing IRQ If the IRQ controller is not yet probed do not proceed with irq=0, try to defer the probe. Signed-off-by: Alexander Sverdlin Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/8250/8250_of.c | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'drivers/tty') diff --git a/drivers/tty/serial/8250/8250_of.c b/drivers/tty/serial/8250/8250_of.c index 863e86b9a424..af8beefe9b5c 100644 --- a/drivers/tty/serial/8250/8250_of.c +++ b/drivers/tty/serial/8250/8250_of.c @@ -144,6 +144,10 @@ static int of_platform_serial_setup(struct platform_device *ofdev, port->line = ret; port->irq = irq_of_parse_and_map(np, 0); + if (!port->irq) { + ret = -EPROBE_DEFER; + goto err_unprepare; + } info->rst = devm_reset_control_get_optional_shared(&ofdev->dev, NULL); if (IS_ERR(info->rst)) { -- cgit v1.2.3