Re: Problem with interrupt handler

["Uwe Kleine-König" <u.kleine-koenig@pengutronix.de>]

On Mon, Jan 25, 2010 at 06:16:08PM +0100, Julian Fuchs wrote:
> being aware of the risk to bother some people here I would
> nevertheless really appreciate your help with the following issue:
> 
> Is there any difference in the request_irq() function call in
> comparison to the one in the normal kernel?
> 
> I'm trying to run
> 
> request_irq(irq, interrupt_handler, IRQF_SHARED | IRQF_DISABLED |
> IRQF_NODELAY, MODULE_IDENT, &stage)
> 
> on 2.6.31.6-rt19 but it doesn't call interrupt_handler() when an
> interrupt is received.
> 
> In the plain kernel 2.6.31 it works with this call:
> 
> request_irq(irq, interrupt_handler, IRQF_SHARED | IRQF_DISABLED,
> MODULE_IDENT, &stage)
Did you try with IRQF_NODELAY on vanilla and without it in rt?  Are you
sure the irq fires in rt?  Does your interrupt appear in
/proc/interrupts?  What platform are you working on?  Do you can send
the code of a minimal example?

Best regards
Uwe

-- 
Pengutronix e.K.                              | Uwe Kleine-König            |
Industrial Linux Solutions                    | http://www.pengutronix.de/  |
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