linux-kernel - Re: [Question]should we not ignore the masked interrupt in regmap?

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Message-ID: <CAK=oMXeyqGcQOOnCmZBfg3GhdmO+uREiGut-L9yk53aQ3p7FZQ@mail.gmail.com>
Date:	Sat, 12 Oct 2013 20:50:57 +0800
From:	yi zhang <yizhang.mrvl@...il.com>
To:	Mark Brown <broonie@...nel.org>
Cc:	Yi Zhang <yizhang@...vell.com>, zhouqiao@...vell.com,
	zhangwm@...vell.com, linux-kernel@...r.kernel.org
Subject: Re: [Question]should we not ignore the masked interrupt in regmap?

2013/10/12 Mark Brown <broonie@...nel.org>:
> On Sat, Oct 12, 2013 at 11:14:27AM +0800, yi zhang wrote:
>
>> 1) interrupt is triggered;
>> 2) a thread disables it(then the mask bit is set);
>> 3) _Then_ the interrupt thread is executed, it _ignore _ and doesn’t
>> handle this interrupt;
>>    because the interrupt is not ACKed, the interrupt status is not cleared;
>> 4) in Marvell's PMIC, the interrupt line to SOC is always asserted,
>> then irq storm happens;
>
> This sounds like you need the workaround activated by init_ack_masked.
> It's basically the hardware failing to implement masking sensibly - the
> general expectation for a mask bit is that it will have no effect on the
> actual state of the interrupt, only on if it's reported.
Thanks Mark;

As I understand it, this "init_ack_masked" is used in initialization
(please correct me if I'm wrong);
but if the sequence above happens not in the initialization, then what
should we do to handle this?
could you please give us advice?

thanks very much;
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