Le Fri, 26 Dec 2008 15:05:28 +0300,
"Denis Borisevich" <[email protected]> a écrit :
> In my driver init function I try to register interrupt handler with
> request_irq(), but always get -EBUSY. This interrupt is shared with
> ahci driver. I use kernel version 2.6.24.7. Is there any other way to
> register the interrupt handler? Or maybe I'm doing something wrong?
The code is in kernel/irq/manage.c:setup_irq() :
if (!((old->flags & new->flags) & IRQF_SHARED) ||
((old->flags ^ new->flags) & IRQF_TRIGGER_MASK)) {
old_name = old->name;
goto mismatch;
}
The AHCI interrupt is registered with IRQF_SHARED (at least in recent
kernels, I didn't check in 2.6.24). Make sure you also register your
handler with IRQF_SHARED in the flags. If so, then the trigger type may
not match.
Sincerly,
Thomas
--
Thomas Petazzoni, Free Electrons
Kernel, drivers and embedded Linux development,
consulting, training and support.
http://free-electrons.com
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