genirq: Fix irqfixup, irqpoll regression

commit d05c65fff0 ("genirq: spurious: Run only one poller at a time") introduced a regression, leaving the boot options 'irqfixup' and 'irqpoll' non-functional. The patch placed tests in each function, to exit if the function is already running. The test in 'misrouted_irq' exited when it should have proceeded, effectively disabling 'misrouted_irq' and 'poll_spurious_irqs'. The check for an already running poller needs to be "!= 1" not "== 1" as "1" is the value when the first poller starts running.

Edward Donovan committed 15 years ago

Commit c75d7201 parent c3b92c81 file · +1 −1Browse files

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kernel/irq/spurious.c+1−1

@@ -115,7 +115,7 @@ static int misrouted_irq(int irq) · 114 unmodified lines
115	115	struct irq_desc *desc;
116	116	int i, ok = 0;
117	117
118		− if (atomic_inc_return(&irq_poll_active) == 1)
	118	+ if (atomic_inc_return(&irq_poll_active) != 1)
119	119	goto out;
120	120
121	121	irq_poll_cpu = smp_processor_id();