diff options
Diffstat (limited to 'kernel/irq/handle.c')
| -rw-r--r-- | kernel/irq/handle.c | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/kernel/irq/handle.c b/kernel/irq/handle.c index e103451243a0..786f5570a640 100644 --- a/kernel/irq/handle.c +++ b/kernel/irq/handle.c @@ -133,7 +133,15 @@ void __irq_wake_thread(struct irq_desc *desc, struct irqaction *action) */ atomic_inc(&desc->threads_active); - wake_up_process(action->thread); + /* + * This might be a premature wakeup before the thread reached the + * thread function and set the IRQTF_READY bit. It's waiting in + * kthread code with state UNINTERRUPTIBLE. Once it reaches the + * thread function it waits with INTERRUPTIBLE. The wakeup is not + * lost in that case because the thread is guaranteed to observe + * the RUN flag before it goes to sleep in wait_for_interrupt(). + */ + wake_up_state(action->thread, TASK_INTERRUPTIBLE); } static DEFINE_STATIC_KEY_FALSE(irqhandler_duration_check_enabled); |