From: Edward Donovan Date: Tue, 1 Nov 2011 19:29:44 +0000 (-0400) Subject: genirq: Fix irqfixup, irqpoll regression X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=c75d720fca8a91ce99196d33adea383621027bf2;p=GitHub%2FLineageOS%2FG12%2Fandroid_kernel_amlogic_linux-4.9.git 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. Signed-off-by: Edward Donovan Cc: maciej.rutecki@gmail.com Link: http://lkml.kernel.org/r/1320175784-6745-1-git-send-email-edward.donovan@numble.net Cc: stable@vger.kernel.org # >= 2.6.39 Signed-off-by: Thomas Gleixner --- diff --git a/kernel/irq/spurious.c b/kernel/irq/spurious.c index aa57d5da18c1..b5f4742693c0 100644 --- a/kernel/irq/spurious.c +++ b/kernel/irq/spurious.c @@ -115,7 +115,7 @@ static int misrouted_irq(int irq) struct irq_desc *desc; int i, ok = 0; - if (atomic_inc_return(&irq_poll_active) == 1) + if (atomic_inc_return(&irq_poll_active) != 1) goto out; irq_poll_cpu = smp_processor_id();