diff options
Diffstat (limited to 'kernel/irq/manage.c')
| -rw-r--r-- | kernel/irq/manage.c | 41 |
1 files changed, 19 insertions, 22 deletions
diff --git a/kernel/irq/manage.c b/kernel/irq/manage.c index d2742af0f0fd..1782f90cd8c6 100644 --- a/kernel/irq/manage.c +++ b/kernel/irq/manage.c @@ -108,6 +108,16 @@ bool synchronize_hardirq(unsigned int irq) } EXPORT_SYMBOL(synchronize_hardirq); +static void __synchronize_irq(struct irq_desc *desc) +{ + __synchronize_hardirq(desc, true); + /* + * We made sure that no hardirq handler is running. Now verify that no + * threaded handlers are active. + */ + wait_event(desc->wait_for_threads, !atomic_read(&desc->threads_active)); +} + /** * synchronize_irq - wait for pending IRQ handlers (on other CPUs) * @irq: interrupt number to wait for @@ -127,16 +137,8 @@ void synchronize_irq(unsigned int irq) { struct irq_desc *desc = irq_to_desc(irq); - if (desc) { - __synchronize_hardirq(desc, true); - /* - * We made sure that no hardirq handler is - * running. Now verify that no threaded handlers are - * active. - */ - wait_event(desc->wait_for_threads, - !atomic_read(&desc->threads_active)); - } + if (desc) + __synchronize_irq(desc); } EXPORT_SYMBOL(synchronize_irq); @@ -1216,7 +1218,7 @@ static irqreturn_t irq_thread_fn(struct irq_desc *desc, return ret; } -static void wake_threads_waitq(struct irq_desc *desc) +void wake_threads_waitq(struct irq_desc *desc) { if (atomic_dec_and_test(&desc->threads_active)) wake_up(&desc->wait_for_threads); @@ -1850,15 +1852,13 @@ out_thread: struct task_struct *t = new->thread; new->thread = NULL; - kthread_stop(t); - put_task_struct(t); + kthread_stop_put(t); } if (new->secondary && new->secondary->thread) { struct task_struct *t = new->secondary->thread; new->secondary->thread = NULL; - kthread_stop(t); - put_task_struct(t); + kthread_stop_put(t); } out_mput: module_put(desc->owner); @@ -1944,7 +1944,7 @@ static struct irqaction *__free_irq(struct irq_desc *desc, void *dev_id) * supports it also make sure that there is no (not yet serviced) * interrupt in flight at the hardware level. */ - __synchronize_hardirq(desc, true); + __synchronize_irq(desc); #ifdef CONFIG_DEBUG_SHIRQ /* @@ -1969,12 +1969,9 @@ static struct irqaction *__free_irq(struct irq_desc *desc, void *dev_id) * the same bit to a newly requested action. */ if (action->thread) { - kthread_stop(action->thread); - put_task_struct(action->thread); - if (action->secondary && action->secondary->thread) { - kthread_stop(action->secondary->thread); - put_task_struct(action->secondary->thread); - } + kthread_stop_put(action->thread); + if (action->secondary && action->secondary->thread) + kthread_stop_put(action->secondary->thread); } /* Last action releases resources */ |