Messages in this thread | | | Date | Sat, 14 Jan 2012 15:53:55 +0800 | From | Cong Wang <> | Subject | Re: How to wait for threaded irq handler to finish, as in work queue flush/cancel? |
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On 01/14/2012 01:40 PM, Feng Ye wrote: > Hello there, > > > I have a question regarding how to cancel threaded irq handler in a driver's suspend function. > If it's NOT threaded irq, normally you have a work queue, and in the suspend function, you call either cancel_work_sync() or flush_work(), these function will WAIT for the work queue to finish if it's in the middle of something. > However if you use threaded irq, then you don't need a work queue, then in the suspend function, I don't know if there's a simple function that can be used to cancel and wait the thread to finish? > >
Hi,
Isn't free_irq() what you want?
/** * free_irq - free an interrupt allocated with request_irq * @irq: Interrupt line to free * @dev_id: Device identity to free * * Remove an interrupt handler. The handler is removed and if the * interrupt line is no longer in use by any driver it is disabled. * On a shared IRQ the caller must ensure the interrupt is disabled * on the card it drives before calling this function. The function * does not return until any executing interrupts for this IRQ * have completed. * * This function must not be called from interrupt context. */
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