Re: [PATCH v3 1/5] genirq/devres: Add devm_request_threaded_irq_emsg()

[Krzysztof Kozlowski]

On 03/07/2023 19:43, Uwe Kleine-König wrote:
> Hello Krzysztof,
> 
> On Mon, Jul 03, 2023 at 02:31:59PM +0200, Krzysztof Kozlowski wrote:
>> 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.
> 
> dev_err_probe is supposed to be only called in probe functions, while
> devm_request_threaded_irq might be called in other contexts (e.g. when a
> device is opened). That's why I asked to not use dev_err_probe() in v2

True, but then all the callers of this function will forget to set
deferred probe reason.

Best regards,
Krzysztof