Hi Alan Stern, On Wed, Mar 14, 2018 at 04:52:13PM -0400, Alan Stern wrote: > This should not be needed; it indicates that something is wrong with > the way interrupt requests are handled on this platform. > > Are you using threaded interrupts at all? If you are, you have to > change the spin_lock() call in ohci_irq() to spin_lock_irqsave(). You > could try making this change in any case, to see if it prevents the > freezes. No, I'm not using threaded interrupts, so spin_lock_irqsave() did unfortunately not help. However, replacing the OHCI interrupt with a 1000 Hz timer works perfectly. Perhaps the problem is that a wanted interrupt is lost somehow? Would you recommend any method to trace the OHCI to investigate its state at the freezing point? It's a MIPS architecture and v4.17. Fredrik -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
