linux-kernel - Re: Need help: how to locate failure from irq

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Date:   Fri, 18 Jan 2019 16:50:10 +0530
From:   Pintu Agarwal <pintu.ping@...il.com>
To:     Sai Prakash Ranjan <saiprakash.ranjan@...eaurora.org>
Cc:     open list <linux-kernel@...r.kernel.org>,
        linux-arm-kernel@...ts.infradead.org,
        Russell King - ARM Linux <linux@...linux.org.uk>,
        linux-mm@...ck.org, linux-pm@...r.kernel.org,
        kernelnewbies@...nelnewbies.org
Subject: Re: Need help: how to locate failure from irq_chip subsystem

> >> Could you please tell which QCOM SoC this board is based on?
> >>
> >
> > Snapdragon 845 with kernel 4.9.x
> > I want to know from which subsystem it is triggered:drivers/soc/qcom/
> >
>
> Irqchip driver is "drivers/irqchip/irq-gic-v3.c". The kernel you are
> using is msm-4.9 I suppose or some other kernel?
>
Yes, I am using customized version of msm-4.9 kernel based on Android.
And yes the irqchip driver is: irq-gic-v3, which I can see from config.

But, what I wanted to know is, how to find out which driver module
(hopefully under: /drivers/soc/qcom/) that register with this
irq_chip, is getting triggered at the time of crash ?
So, that I can implement irq_hold function for it, which is the cause of crash.