1 // SPDX-License-Identifier: GPL-2.0
3  * Copyright (C) 1992, 1998-2004 Linus Torvalds, Ingo Molnar
33 	guard(raw_spinlock)(&desc->lock);  in try_one_irq()
47 	if (irqd_irq_disabled(&desc->irq_data) && !force)  in try_one_irq()
54 	action = desc->action;  in try_one_irq()
55 	if (!action || !(action->flags & IRQF_SHARED) || (action->flags & __IRQF_TIMER))  in try_one_irq()
59 	if (irqd_irq_inprogress(&desc->irq_data)) {  in try_one_irq()
64 		desc->istate |= IRQS_PENDING;  in try_one_irq()
69 	desc->istate |= IRQS_POLL_INPROGRESS;  in try_one_irq()
74 		action = desc->action;  in try_one_irq()
75 	} while ((desc->istate & IRQS_PENDING) && action);  in try_one_irq()
76 	desc->istate &= ~IRQS_POLL_INPROGRESS;  in try_one_irq()
122 		state = READ_ONCE(desc->istate);  in poll_spurious_irqs()
149  * (The other 100-of-100,000 interrupts may have been a correctly
150  *  functioning device sharing an IRQ with the failing one)
165 	 * We need to take desc->lock here. note_interrupt() is called  in __report_bad_irq()
166 	 * w/o desc->lock held, but IRQ_PROGRESS set. We might race  in __report_bad_irq()
168 	 * desc->lock here. See synchronize_irq().  in __report_bad_irq()
170 	guard(raw_spinlock_irqsave)(&desc->lock);  in __report_bad_irq()
172 		pr_err("[<%p>] %ps", action->handler, action->handler);  in __report_bad_irq()
173 		if (action->thread_fn)  in __report_bad_irq()
174 			pr_cont(" threaded [<%p>] %ps", action->thread_fn, action->thread_fn);  in __report_bad_irq()
184 		count--;  in report_bad_irq()
197 	/* We didn't actually handle the IRQ - see if it was misrouted? */  in try_misrouted_irq()
216 	action = READ_ONCE(desc->action);  in try_misrouted_irq()
217 	return action && (action->flags & IRQF_IRQPOLL);  in try_misrouted_irq()
226 	if (desc->istate & IRQS_POLL_INPROGRESS || irq_settings_is_polled(desc))  in note_interrupt()
236 	 * because we need to look at the compound of all handlers  in note_interrupt()
271 			if (!(desc->threads_handled_last & SPURIOUS_DEFERRED)) {  in note_interrupt()
272 				desc->threads_handled_last |= SPURIOUS_DEFERRED;  in note_interrupt()
287 			handled = atomic_read(&desc->threads_handled);  in note_interrupt()
289 			if (handled != desc->threads_handled_last) {  in note_interrupt()
299 				desc->threads_handled_last = handled;  in note_interrupt()
330 			desc->threads_handled_last &= ~SPURIOUS_DEFERRED;  in note_interrupt()
341 		if (time_after(jiffies, desc->last_unhandled + HZ/10))  in note_interrupt()
342 			desc->irqs_unhandled = 1;  in note_interrupt()
344 			desc->irqs_unhandled++;  in note_interrupt()
345 		desc->last_unhandled = jiffies;  in note_interrupt()
352 			desc->irqs_unhandled -= ok;  in note_interrupt()
355 	if (likely(!desc->irqs_unhandled))  in note_interrupt()
359 	desc->irq_count++;  in note_interrupt()
360 	if (likely(desc->irq_count < 100000))  in note_interrupt()
363 	desc->irq_count = 0;  in note_interrupt()
364 	if (unlikely(desc->irqs_unhandled > 99900)) {  in note_interrupt()
373 		desc->istate |= IRQS_SPURIOUS_DISABLED;  in note_interrupt()
374 		desc->depth++;  in note_interrupt()
379 	desc->irqs_unhandled = 0;  in note_interrupt()