Hi Guennadi,
On Tue, Jun 12 2012, Guennadi Liakhovetski wrote:
>> I noticed that mmc_cd_gpio_request() failed on request_threaded_irq().
>> Now, I'm using v3.5-rc2 kernel.
>>
>> current ${LINUX}/drivers/mmc/core/cd-gpio.c :: mmc_cd_gpio_request() uses
>>
>> request_threaded_irq(irq, NULL, mmc_cd_gpio_irqt,
>> IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING,
>> cd->label, host);
>>
>> It doesn't have hander (2nd is NULL), and flag doesn't have IRQF_ONESHOT.
>> Then, it run request_threaded_irq() -> __setup_irq()
>> and, it got this error.
>>
>> pr_err("Threaded irq requested with handler=NULL and !ONESHOT for irq %d\n",
>> irq);
>>
>> I'm not sure detail of it, but maybe from this commit
>>
>> -------------------------------------------
>> commit 1c6c69525b40eb76de8adf039409722015927dc3
>> Author: Thomas Gleixner <[email protected]>
>> Date: Thu Apr 19 10:35:17 2012 +0200
>>
>> genirq: Reject bogus threaded irq requests
>
> Also see this thread: https://lkml.org/lkml/2012/6/12/151
>
> For now you can add an IRQF_ONESHOT flag to the call.
Should we get this change into 3.5?
Thanks,
- Chris.
--
Chris Ball <[email protected]> <http://printf.net/>
One Laptop Per Child
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