Re: Design of interrupt controller driver

From	Thomas Gleixner <tglx@linutronix.de>
Newsgroups	linux.kernel
Subject	Re: Design of interrupt controller driver
Date	2017-06-06 12:40 +0200
Message-ID	<tPk41-7uB-9@gated-at.bofh.it> (permalink)
References	(4 earlier) <tONrr-3lC-1@gated-at.bofh.it> <tOVyH-rf-47@gated-at.bofh.it> <tOYPT-2rK-11@gated-at.bofh.it> <tPhfQ-5IU-33@gated-at.bofh.it> <tPj7Y-6SP-5@gated-at.bofh.it>
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On Tue, 6 Jun 2017, Mason wrote:
> On 06/06/2017 09:39, Thomas Gleixner wrote:
> What about disable_irq(virq);
> That function /is/ exported API, and eventually calls mask_irq.
> 
> disable_irq -> __disable_irq_nosync -> __disable_irq -> irq_disable -> mask_irq

What you can call from an ISR is disable_irq_nosync(). disable_irq() will
deadlock.

Thanks,

	tglx

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Design of interrupt controller driver Mason <slash.tmp@free.fr> - 2017-06-03 19:00 +0200
  Re: Design of interrupt controller driver Mason <slash.tmp@free.fr> - 2017-06-03 20:30 +0200
  Re: Design of interrupt controller driver Thomas Gleixner <tglx@linutronix.de> - 2017-06-04 16:00 +0200
    Re: Design of interrupt controller driver Mason <slash.tmp@free.fr> - 2017-06-04 19:20 +0200
      Re: Design of interrupt controller driver Thomas Gleixner <tglx@linutronix.de> - 2017-06-04 22:20 +0200
        Re: Design of interrupt controller driver Mason <slash.tmp@free.fr> - 2017-06-05 01:50 +0200
          Re: Design of interrupt controller driver Thomas Gleixner <tglx@linutronix.de> - 2017-06-05 10:30 +0200
            Re: Design of interrupt controller driver Mason <slash.tmp@free.fr> - 2017-06-05 14:00 +0200
              Re: Design of interrupt controller driver Thomas Gleixner <tglx@linutronix.de> - 2017-06-06 09:40 +0200
                Re: Design of interrupt controller driver Mason <slash.tmp@free.fr> - 2017-06-06 11:40 +0200
                Re: Design of interrupt controller driver Thomas Gleixner <tglx@linutronix.de> - 2017-06-06 12:40 +0200

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