Hi Thomas, On Wed, Jan 15, 2020 at 01:59:50PM +0100, Thomas Bogendoerfer wrote: > + > + platform_set_drvdata(pdev, d); > + serio_register_port(d->kbd); > + serio_register_port(d->aux); > + > + ret = request_irq(irq, ioc3kbd_intr, IRQF_SHARED, "ioc3-kbd", d); I just realized something - serio ports are registered asynchronously, and therefore may not be ready when you request IRQ which may fire immediately. To solve this issue serio core allows to specify start() method that is called after serio port has been registered. In this method you can set "exist" flag associated with either kbd or aux port, and check these flags in your interrupt routine before deciding whether you can forward the received data to appropriate port via serio_interrupt(). Please see i8042_start() for example of use. Thanks. -- Dmitry
