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Re: [PATCH 0/5] Fix regression introduced by set_irq_flags() removal

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On Tue, Oct 20, 2015 at 04:08:28PM +0200, Thomas Petazzoni wrote:
> As discussed on IRC, another simpler (code line wise) solution is to
> simply clear the IRQ_NOAUTOEN flag in the irq-armada-370-xp, which
> brings us back to what set_irq_flags() was doing, without actually
> reverting Rob's patch.
> 
> However, relying on IRQ_NOAUTOEN being cleared doesn't seem like the
> right long term solution, which is why I implemented what I believe is
> a (hopefully) better long term solution.

However, this is rather worrying.  NOAUTOEN is supposed to avoid enabling
the interrupt when the interrupt is claimed.

If, as a result of Rob's patch, we now have a load of IRQs which are
marked with NOAUTOEN which weren't, that's quite a large regression -
possibly one which hasn't been properly found (not everyone tests -rc
kernels) and we may be better to revert Rob's patch to avoid lots of
breakge being reported when 4.3 is released.

I think Rob's patches need another review in light of this, to determine
how much breakage there is here, and a decision how to proceed made on
that basis.

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[PATCH 0/5] Fix regression introduced by set_irq_flags() removal Thomas Petazzoni <thomas.petazzoni@free-electrons.com> - 2015-10-20 15:30 +0200
  Re: [PATCH 0/5] Fix regression introduced by set_irq_flags()  removal Thomas Petazzoni <thomas.petazzoni@free-electrons.com> - 2015-10-20 16:10 +0200
    Re: [PATCH 0/5] Fix regression introduced by set_irq_flags() removal Russell King - ARM Linux <linux@arm.linux.org.uk> - 2015-10-20 16:20 +0200
      Re: [PATCH 0/5] Fix regression introduced by set_irq_flags()  removal Thomas Petazzoni <thomas.petazzoni@free-electrons.com> - 2015-10-20 16:30 +0200
      Re: [PATCH 0/5] Fix regression introduced by set_irq_flags()  removal Thomas Gleixner <tglx@linutronix.de> - 2015-10-20 21:30 +0200
        Re: [PATCH 0/5] Fix regression introduced by set_irq_flags()  removal Thomas Gleixner <tglx@linutronix.de> - 2015-10-22 10:10 +0200
    Re: [PATCH 0/5] Fix regression introduced by set_irq_flags()  removal Thomas Gleixner <tglx@linutronix.de> - 2015-10-20 21:30 +0200
      [PATCH] irqchip: irq-armada-370-xp: fix regression by clearing IRQ_NOAUTOEN Thomas Petazzoni <thomas.petazzoni@free-electrons.com> - 2015-10-21 15:50 +0200
        Re: [PATCH] irqchip: irq-armada-370-xp: fix regression by clearing  IRQ_NOAUTOEN Jason Cooper <jason@lakedaemon.net> - 2015-10-21 16:50 +0200
      Re: [PATCH 0/5] Fix regression introduced by set_irq_flags()  removal Thomas Petazzoni <thomas.petazzoni@free-electrons.com> - 2015-10-21 15:50 +0200
  Re: [PATCH 0/5] Fix regression introduced by set_irq_flags() removal Jason Cooper <jason@lakedaemon.net> - 2015-10-20 16:10 +0200

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