On 21/09/17 12:41, Linus Walleij wrote:
> On Fri, Sep 15, 2017 at 10:26 AM, Jerome Brunet <[email protected]> wrote:
>
>> I initially planned to do some refcounting in the gpio layer but that would
>> make
>> no sense, as you pointed out, the irq could be shared. This refcounting would
>> only make sense at the irq level.
>>
>> On a more general note, I wonder when is it safe for a driver to dispose of
>> the
>> mapping of a possibly shared irq ? There is no way to know if the mapping is
>> still used somewhere else, or am I missing something again ?
>
> I have no idea, but maybe Marc Z or Rob H knows this?
>
> They usually have a bit of deeper IRQ-centric knowledge.
Unfortunately, there is no such thing. I contemplated tracking this at
some point, and got sidetracked. In general, the irq domain and irq core
are horribly disconnected, leading to that exact line of questioning.
M.
--
Jazz is not dead. It just smells funny...
