Hi, On Sat, Feb 15, 2020 at 02:02:35AM +0800, 周琰杰 (Zhou Yanjie) wrote: > + /* setup the mailbox IRQ */ > + setup_irq(MIPS_CPU_IRQ_BASE + 3, &mbox_action); s/setup_irq/request_irq, see, https://lkml.kernel.org/r/alpine.DEB.2.20.1710191609480.1971@nanos https://lkml.kernel.org/r/cover.1581478323.git.afzal.mohd.ma@xxxxxxxxx Regards afzal