linux-kernel - Re: [PATCH RFC] PM: sleep: wakeirq: Fix a serious logical error in dev_pm_disarm_wake

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Message-ID: <1ab63479-15d1-4116-ac70-9bc42b85a972@quicinc.com>
Date: Sun, 29 Sep 2024 00:08:05 +0800
From: quic_zijuhu <quic_zijuhu@...cinc.com>
To: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
CC: "Rafael J. Wysocki" <rafael@...nel.org>, Len Brown <len.brown@...el.com>,
        Pavel Machek <pavel@....cz>, Johan Hovold <johan+linaro@...nel.org>,
        Tony
 Lindgren <tony@...mide.com>, Zijun Hu <zijun_hu@...oud.com>,
        <linux-pm@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <d-gole@...com>, <qingliang.li@...iatek.com>
Subject: Re: [PATCH RFC] PM: sleep: wakeirq: Fix a serious logical error in
 dev_pm_disarm_wake_irq()

On 9/28/2024 6:50 PM, Greg Kroah-Hartman wrote:
> On Sat, Sep 28, 2024 at 02:26:27AM -0700, Zijun Hu wrote:
>> IT is a serious logical error for dev_pm_disarm_wake_irq() not to disable
>> the wake irq enabled by dev_pm_arm_wake_irq(), fixed by simply correcting
>> the wrong if condition.
>>
>> Signed-off-by: Zijun Hu <quic_zijuhu@...cinc.com>
> 
> What commit id does this fix?
> 

it is below commit ever mentioned.

tony@...mide.com  2018-02-09
Commit: 69728051f5bf ("PM / wakeirq: Fix unbalanced IRQ enable for wakeirq")

>> ---
>> List relevant commits as following:
>>

there are one more related commit shown below:

qingliang.li@...iatek.com  2024-03-01
Fixes: e7a7681c8596 ("PM: sleep: wakeirq: fix wake irq warning in system
suspend")

>> johan+linaro@...nel.org  2023-07-13
>> Commit: 8527beb12087 ("PM: sleep: wakeirq: fix wake irq arming")
>>
>> tony@...mide.com  2018-02-09
>> Commit: 69728051f5bf ("PM / wakeirq: Fix unbalanced IRQ enable for wakeirq")
>>
>> The former commit fixes the later.
> 
> I do not understand this series of commits, what exactly are you trying
> to show here?
>

there are total 3 history commits mentioned, and the 1st fixes the 2nd
which in turn fixes the 3rd, and all these commits involves "unbalanced
wake IRQ enablement"

is the issue "unbalanced wake IRQ enablement" relevant to this weird
logic which looks wrong ?

> confused,
> 
> greg k-h