Re: request_irq() usage in wm8350_register_irq().

[Sebastian Andrzej Siewior]

On 2026-01-21 11:22:32 [+0000], Richard Fitzgerald wrote:
> Or because request_threaded_irq() supplies a default handler, so
> handler!=NULL when it calls __setup_irq().
> 
> 
> int request_threaded_irq(unsigned int irq, irq_handler_t handler,
> 			 irq_handler_t thread_fn, unsigned long irqflags,
> 			 const char *devname, void *dev_id)
> {
> 
> ...
> 
> 	if (!handler) {
> 		if (!thread_fn)
> 			return -EINVAL;
> 		handler = irq_default_primary_handler;
> 	}
> 
> ...
> 
> 
> 	retval = __setup_irq(irq, desc, action);
> 
> ...
> }

->

|         } else if (new->handler == irq_default_primary_handler &&
|                    !(desc->irq_data.chip->flags & IRQCHIP_ONESHOT_SAFE)) {
…
|                 pr_err("Threaded irq requested with handler=NULL and !ONESHOT for %s (irq %d)\n",
|                        new->name, irq);
|                 ret = -EINVAL;

Sebastian