D29326.diff
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	Index: sys/kern/subr_intr.c
	===================================================================
	--- sys/kern/subr_intr.c
	+++ sys/kern/subr_intr.c
	@@ -401,15 +401,14 @@
	static inline int
	isrc_alloc_irq(struct intr_irqsrc *isrc)
	{
	- u_int maxirqs, irq;
	+ u_int irq;

	mtx_assert(&isrc_table_lock, MA_OWNED);

	- maxirqs = intr_nirq;
	- if (irq_next_free >= maxirqs)
	+ if (irq_next_free >= intr_nirq)
	return (ENOSPC);

	- for (irq = irq_next_free; irq < maxirqs; irq++) {
	+ for (irq = irq_next_free; irq < intr_nirq; irq++) {
	if (irq_sources[irq] == NULL)
	goto found;
	}
	@@ -418,7 +417,7 @@
	goto found;
	}

	- irq_next_free = maxirqs;
	+ irq_next_free = intr_nirq;
	return (ENOSPC);

	found:
	@@ -426,7 +425,7 @@
	irq_sources[irq] = isrc;

	irq_next_free = irq + 1;
	- if (irq_next_free >= maxirqs)
	+ if (irq_next_free >= intr_nirq)
	irq_next_free = 0;
	return (0);
	}