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Thomas Gleixner c847ac8e8e genirq: Clear action->thread_mask if IRQ_ONESHOT is not set

commit 52abb700e1 upstream.

Xommit ac5637611(genirq: Unmask oneshot irqs when thread was not woken)
fails to unmask when a !IRQ_ONESHOT threaded handler is handled by
handle_level_irq.

This happens because thread_mask is or'ed unconditionally in
irq_wake_thread(), but for !IRQ_ONESHOT interrupts never cleared.  So
the check for !desc->thread_active fails and keeps the interrupt
disabled.

Keep the thread_mask zero for !IRQ_ONESHOT interrupts.

Document the thread_mask magic while at it.

Reported-and-tested-by: Sven Joachim <svenjoac@gmx.de>
Reported-and-tested-by: Stefan Lippers-Hollmann <s.l-h@gmx.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

2012-03-12 10:32:53 -07:00

autoprobe.c

genirq: Handle pending irqs in irq_startup()

2012-02-29 16:34:29 -08:00

chip.c

genirq: Handle pending irqs in irq_startup()

2012-02-29 16:34:29 -08:00

debug.h

genirq: Support per-IRQ thread disabling.

2011-04-23 15:56:24 +02:00

devres.c

devres/irq: Fix devm_irq_match comment