linux-kernel - Re: [PATCH v2 -next] genirq: Separate warning messages of enable of suspended irq

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Date:   Mon, 31 Oct 2022 08:39:06 +0800
From:   chenlifu <chenlifu@...wei.com>
To:     <tglx@...utronix.de>
CC:     <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2 -next] genirq: Separate warning messages of enable of
 suspended irq

在 2022/9/20 14:42, chenlifu 写道:
> 在 2022/7/28 18:29, Chen Lifu 写道:
>> Both unbalanced enable for irq and enable of suspended irq
>> print same warning messages, such as:
>> ......
>> [20220314100142]------------[ cut here ]------------
>> [20220314100142]WARNING: CPU: 1 PID: 10332 at kernel/irq/manage.c:723 
>> __enable_irq+0x58/0xa4
>> [20220314100142]Unbalanced enable for IRQ 38
>> ......
>>
>> It's confusing. Separate the warning messages to make it clear.
>> No functional changes.
>>
>> Signed-off-by: Chen Lifu <chenlifu@...wei.com>
>> ---
>>   kernel/irq/manage.c | 8 +++++---
>>   1 file changed, 5 insertions(+), 3 deletions(-)
>>
>> diff --git a/kernel/irq/manage.c b/kernel/irq/manage.c
>> index 40fe7806cc8c..bf4f5f63b2d3 100644
>> --- a/kernel/irq/manage.c
>> +++ b/kernel/irq/manage.c
>> @@ -775,17 +775,19 @@ void disable_nmi_nosync(unsigned int irq)
>>   void __enable_irq(struct irq_desc *desc)
>>   {
>>       switch (desc->depth) {
>>       case 0:
>> - err_out:
>>           WARN(1, KERN_WARNING "Unbalanced enable for IRQ %d\n",
>>                irq_desc_get_irq(desc));
>>           break;
>>       case 1: {
>> -        if (desc->istate & IRQS_SUSPENDED)
>> -            goto err_out;
>> +        if (desc->istate & IRQS_SUSPENDED) {
>> +            WARN(1, KERN_WARNING "Enable of suspended IRQ %d\n",
>> +                 irq_desc_get_irq(desc));
>> +            break;
>> +        }
>>           /* Prevent probing on this irq: */
>>           irq_settings_set_noprobe(desc);
>>           /*
>>            * Call irq_startup() not irq_enable() here because the
>>            * interrupt might be marked NOAUTOEN. So irq_startup()
>>
> 
> Friendly ping ...
> 
> .

Friendly ping ...