Messages in this thread | | | From | Linus Walleij <> | Date | Thu, 21 Sep 2017 13:41:45 +0200 | Subject | Re: [RFT PATCH v2] gpiolib: allow gpio irqchip to map irqs dynamically |
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On Fri, Sep 15, 2017 at 10:26 AM, Jerome Brunet <jbrunet@baylibre.com> 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.
Yours, Linus Walleij
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