linux-kernel - Re: [PATCH v3 1/5] genirq/devres: Add devm_request_threaded_irq

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Date:   Mon, 3 Jul 2023 21:24:34 +0800
From:   Yangtao Li <frank.li@...o.com>
To:     Krzysztof Kozlowski <krzk@...nel.org>, miquel.raynal@...tlin.com,
        rafael@...nel.org, daniel.lezcano@...aro.org, amitk@...nel.org,
        rui.zhang@...el.com, mmayer@...adcom.com,
        bcm-kernel-feedback-list@...adcom.com,
        florian.fainelli@...adcom.com, tglx@...utronix.de,
        matthias.bgg@...il.com, angelogioacchino.delregno@...labora.com,
        bchihi@...libre.com, wenst@...omium.org
Cc:     linux-pm@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org
Subject: Re: [PATCH v3 1/5] genirq/devres: Add
 devm_request_threaded_irq_emsg()


On 2023/7/3 20:31, Krzysztof Kozlowski wrote:
> [你通常不会收到来自 krzk@...nel.org 的电子邮件。请访问 https://aka.ms/LearnAboutSenderIdentification，以了解这一点为什么很重要]
>
> On 03/07/2023 11:04, Yangtao Li wrote:
>> There are more than 700 calls to the devm_request_threaded_irq method.
>> Most drivers only request one interrupt resource, and these error
>> messages are basically the same. If error messages are printed
>> everywhere, more than 1000 lines of code can be saved by removing the
>> msg in the driver.
>
> ...
>
>> +int devm_request_threaded_irq_emsg(struct device *dev, unsigned int irq,
>> +                                irq_handler_t handler, irq_handler_t thread_fn,
>> +                                unsigned long irqflags, const char *devname,
>> +                                void *dev_id, const char *emsg)
>> +{
>> +     int rc;
>> +
>> +     rc = devm_request_threaded_irq(dev, irq, handler, NULL, irqflags,
>> +                                    devname, dev_id);
>> +     if (rc && rc != -EPROBE_DEFER) {
>> +             dev_err(dev, "Failed to request %sinterrupt %u %s %s: %pe\n",
>> +                     thread_fn ? "threaded " : "", irq, devname ? : dev_name(dev),
>> +                     emsg ? : "", ERR_PTR(rc));
> It is open-coding dev_err_probe(). Just use dev_err_probe instead.


How about the following? If possible, I would like to start modifying 
more drivers in the next version.


int devm_request_threaded_irq_emsg(struct device *dev, unsigned int irq,
                                    irq_handler_t handler, irq_handler_t 
thread_fn,
                                    unsigned long irqflags, const char 
*devname,
                                    void *dev_id, const char *emsg)
{
         int rc;

         rc = devm_request_threaded_irq(dev, irq, handler, NULL, irqflags,
                                        devname, dev_id);
         if (rc) {
                 dev_err_probe(dev, rc, "Failed to request %sinterrupt 
%u %s %s\n",
                               thread_fn ? "threaded " : "", irq, 
devname ? : dev_name(dev),
                               emsg ? : "");
         }
         return rc;
}
EXPORT_SYMBOL(devm_request_threaded_irq_emsg);


Thx,

Yangtao


>
> Best regards,
> Krzysztof
>