With platform_get_irq() and its optional variant it's possible to get a deferred probe error code. Since the commit ed7027fdf4ec ("driver core: platform: Make platform_get_irq_optional() optional") the error code can be distinguished from no IRQ case. With this, rewrite IRQ resource handling in sh-sci driver to follow above and allow to respect deferred probe. Fixes: ed7027fdf4ec ("driver core: platform: Make platform_get_irq_optional() optional") Reported-by: Guenter Roeck <linux@xxxxxxxxxxxx> Signed-off-by: Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx> --- v2: fixed a typo: i -> 0 drivers/tty/serial/sh-sci.c | 18 ++++++++---------- 1 file changed, 8 insertions(+), 10 deletions(-) diff --git a/drivers/tty/serial/sh-sci.c b/drivers/tty/serial/sh-sci.c index ad2c189e8fc8..574f68ba50ff 100644 --- a/drivers/tty/serial/sh-sci.c +++ b/drivers/tty/serial/sh-sci.c @@ -2899,13 +2899,6 @@ static int sci_init_single(struct platform_device *dev, port->mapbase = res->start; sci_port->reg_size = resource_size(res); - for (i = 0; i < ARRAY_SIZE(sci_port->irqs); ++i) { - if (i) - sci_port->irqs[i] = platform_get_irq_optional(dev, i); - else - sci_port->irqs[i] = platform_get_irq(dev, i); - } - /* The SCI generates several interrupts. They can be muxed together or * connected to different interrupt lines. In the muxed case only one * interrupt resource is specified as there is only one interrupt ID. @@ -2913,12 +2906,17 @@ static int sci_init_single(struct platform_device *dev, * from the SCI, however those signals might have their own individual * interrupt ID numbers, or muxed together with another interrupt. */ + sci_port->irqs[0] = platform_get_irq(dev, 0); if (sci_port->irqs[0] < 0) - return -ENXIO; + return sci_port->irqs[0]; - if (sci_port->irqs[1] < 0) - for (i = 1; i < ARRAY_SIZE(sci_port->irqs); i++) + for (i = 1; i < ARRAY_SIZE(sci_port->irqs); ++i) { + sci_port->irqs[i] = platform_get_irq_optional(dev, i); + if (sci_port->irqs[i] < 0) + return sci_port->irqs[i]; + if (sci_port->irqs[i] == 0) sci_port->irqs[i] = sci_port->irqs[0]; + } sci_port->params = sci_probe_regmap(p); if (unlikely(sci_port->params == NULL)) -- 2.30.2