On 25 October 2012 15:26, Hongbo Zhang <hongbo.zh...@linaro.org> wrote:
> Verish, see the codes in include/linux/interrupt.h:
s/verish/viresh :)
> static inline int __must_check
> devm_request_irq(struct device *dev, unsigned int irq, irq_handler_t handler,
> unsigned long irqflags, const char *devname, void *dev_id)
> {
> return devm_request_threaded_irq(dev, irq, handler, NULL, irqflags,
> devname, dev_id);
> }
> devm_request_irq is devm_request_threaded_irq
See carefully what's happening here.
All interrupt types have a common irq_desc type in kernel. This has
few pointers for every
interrupt line:
- List of handlers to call from interrupt context
- handlers to call from process context via a thread.
So, the internal implementation is exactly same... The only difference
is which pointer
should be called in.
the devm_request_threaded_irq() called from devm_request_irq() has
following params
handler: For irq to be called from interrupt context (param 3)
NULL: For irq to be called from process context. (param 4)
So, that means normal request_irq type only.
In your case, you have passed interrupt context pointer as NULL and
process context
one as handler. So that's an issue.
--
viresh
_______________________________________________
linaro-dev mailing list
linaro-dev@lists.linaro.org
http://lists.linaro.org/mailman/listinfo/linaro-dev
