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Ido Yariv 550acb1926 genirq: Fix race condition when stopping the irq thread ... In irq_wait_for_interrupt(), the should_stop member is verified before setting the task's state to TASK_INTERRUPTIBLE and calling schedule(). In case kthread_stop sets should_stop and wakes up the process after should_stop is checked by the irq thread but before the task's state is changed, the irq thread might never exit: kthread_stop irq_wait_for_interrupt ------------ ---------------------- ... ... while (!kthread_should_stop()) { kthread->should_stop = 1; wake_up_process(k); wait_for_completion(&kthread->exited); ... set_current_state(TASK_INTERRUPTIBLE); ... schedule(); } Fix this by checking if the thread should stop after modifying the task's state. [ tglx: Simplified it a bit ] Signed-off-by: Ido Yariv <ido@wizery.com> Link: http://lkml.kernel.org/r/1322740508-22640-1-git-send-email-ido@wizery.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: stable@kernel.org		13 years ago
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Kconfig	irq: add irq_domain translation infrastructure	14 years ago
Makefile	irq: add irq_domain translation infrastructure	14 years ago
autoprobe.c	genirq: Remove compat code	14 years ago
chip.c	genirq: Add support for per-cpu dev_id interrupts	14 years ago
debug.h	genirq: Support per-IRQ thread disabling.	14 years ago
devres.c	devres: fix possible use after free	14 years ago
dummychip.c	genirq: Remove compat code	14 years ago
generic-chip.c	kernel: Fix files explicitly needing EXPORT_SYMBOL infrastructure	13 years ago
handle.c	irq: Handle spurios irq detection for threaded irqs	14 years ago
internals.h	genirq: Add support for per-cpu dev_id interrupts	14 years ago
irqdesc.c	irq: don't put module.h into irq.h for tracking irqgen modules.	13 years ago
irqdomain.c	irq: support domains with non-zero hwirq base	13 years ago
manage.c	genirq: Fix race condition when stopping the irq thread	13 years ago
migration.c	Fix common misspellings	14 years ago
pm.c	genirq: Add IRQF_RESUME_EARLY and resume such IRQs earlier	14 years ago
proc.c	irq: Remove smp_affinity_list when unregister irq proc	14 years ago
resend.c	genirq: Remove compat code	14 years ago
settings.h	genirq: Add support for per-cpu dev_id interrupts	14 years ago
spurious.c	genirq: fix regression in irqfixup, irqpoll	13 years ago