[IRQ] Buggy driver makes __setup_irq segfault

[Thomas Gleixner]

On Tue, 9 Jun 2015, Mason wrote:
> I'm a noob, so I suppose this behavior is expected, but I'm reporting it,
> just in case. (I tested with 3.14.41)
> 
> Consider this buggy driver, calling request_irq() multiple times,
> and not calling free_irq in the cleanup routine.

Not freeing things in the module exit code will make stuff explode,
not only interrupts. So yes, it's expected behaviour.

Thanks,

	tglx