Re: Unhandled LM90 irq 308 on Dalmore?

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Hi Jean,

On Thu, 19 Dec 2013, Jean Delvare wrote:

Adding Wei who added interrupt support to the lm90 driver, and moving
to the appropriate list.

Thanks for the speedy response and list correction.

On Thu, 19 Dec 2013 02:08:45 -0800, Paul Walmsley wrote:
Just FYI, the Tegra114 Dalmore board here reports an unhandled IRQ about
two minutes after boot:

[  120.950839] irq 308: nobody cared (try booting with the "irqpoll" option)

...

[  121.019825] handlers:
[  121.022117] [<c0064408>] irq_default_primary_handler threaded
[<c0384764>] lm90_irq_thread
[  121.030418] Disabling IRQ #308

This is on next-20131218.

Which temperature chip is the Tegra114 Dalmore board using?

It's an NCT72.

Is the interrupt shared with something else?

Doesn't look like it.  From /proc/interrupts:

308:      74181          0          0          0      GPIO 116  lm90

That's from shortly after boot. From successive 'cat's of /proc/interrupts, I see that the interrupt count is increasing very quickly. So something is definitely not right.

Is there any monitoring script, application or daemon polling for
temperatures on this system?

This is a totally quiet system, booted with 'init=/bin/bash' on the kernel command line - nothing else running at all.

regards

- Paul


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