Messages in this thread | | | Subject | Re: arm64: next-20170614 panics on boot | From | Marc Zyngier <> | Date | Fri, 16 Jun 2017 11:53:57 +0100 |
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On 16/06/17 10:51, Yury Norov wrote: > (CC irqchip maintainers) > > On Thu, Jun 15, 2017 at 03:33:37PM +0300, Yury Norov wrote: >> On Thu, Jun 15, 2017 at 03:08:40PM +0300, Yury Norov wrote: >>> Hi all, >>> >>> Today's linux next falls into panic in init_IRQ(): >>> arch/arm64/kernel/irq.c: >>> 53 void __init init_IRQ(void) >>> 54 { >>> 55 irqchip_init(); >>> 56 if (!handle_arch_irq) >>> 57 panic("No interrupt controller found."); >>> 58 } >>> >>> >>> Bisecting points to the patch 6fedb069def034 ("of: Provide dummy >>> of_device_compatible_match() for compile-testing"), but reverting it >>> doesn't help. It seems like yesterday's linux-next also hangs. Right >>> now I cannot continue with debugging, but if nothing will get clear, >>> I'll back to it at this evening. >> >> Sorry, forgot to attach the config. This is it. Also, I run arm64 on >> qemu. > > The next-20170616 boots well for me. I didn't manage to bisect the > source of problem - it points to different commmits, and reverting > them doesn't help. The source of the problem is that irqchip_init() > doesn't set the handle_arch_irq. It should be done in > of_irq_init() at the line > > drivers/of/irq.c: > 542 while (!list_empty(&intc_desc_list)) { > ... > 561 ret = desc->irq_init_cb(desc->dev, > 562 desc->interrupt_parent); > ... > 586 } > > On next-20170614 and 15 intc_desc_list is empty at the point. It > should be populated earlier in the loop > 510 for_each_matching_node_and_match(np, matches, &match) > > But np becomes 0 at the 1st iteration, and so the program doesn't enter the > loop. At the first glance there's no recent changes in related code. Maybe it's dts > issue?..
Dunno. I'm booting -next as of today in various arm64 VMs, and everything seems fine. Even 20170614 boots fine in the same configuration. You'll have to investigate a bit more, I'm afraid.
Thanks,
M. -- Jazz is not dead. It just smells funny...
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