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Subject: Re: [RESEND PATCH v1 1/9] spmi: pmic-arb: add a print in cleanup_irq
To:     Stephen Boyd <sboyd@kernel.org>, <linux-arm-msm@vger.kernel.org>,
        <linux-kernel@vger.kernel.org>
CC:     <collinsd@codeaurora.org>, <subbaram@codeaurora.org>,
        Abhijeet Dharmapurikar <adharmap@codeaurora.org>
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 <163415372158.936959.16897606198271075227@swboyd.mtv.corp.google.com>
From:   Fenglin Wu <quic_fenglinw@quicinc.com>
Message-ID: <e94d4b54-316e-220e-aaec-f60311c37745@quicinc.com>
Date:   Thu, 14 Oct 2021 10:26:55 +0800
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On 10/14/2021 3:35 AM, Stephen Boyd wrote:
> Quoting Fenglin Wu (2021-10-12 21:15:42)
>> On 10/13/2021 1:46 AM, Stephen Boyd wrote:
>>> Quoting Fenglin Wu (2021-09-16 23:32:56)
>>>> From: Abhijeet Dharmapurikar <adharmap@codeaurora.org>
>>>>
>>>> The cleanup_irq() was meant to clear and mask interrupts that were
>>>> left enabled in the hardware but there was no interrupt handler
>>>> registered for it. Add an error print when it gets invoked.
>>> Why? Don't we get the genirq spurious irq message in this scenario?
>> Thanks for reviewing the change.
>>
>> No, there is no existing message printed out in this special case ( IRQ
>> fired for not registered interrupt).
> Ah I see so the irq doesn't have a flow handler? Shouldn't you call
> handle_bad_irq() in this case so we get a irq descriptor print?
In such case, the irq number is not valid and there won't be a valid
irq_desc, hence it's not possible to call handle_bad_irq() here.