From: Mark Brown <broonie@kernel.org>
To: yi zhang <yizhang.mrvl@gmail.com>
Cc: Yi Zhang <yizhang@marvell.com>,
zhouqiao@marvell.com, zhangwm@marvell.com,
linux-kernel@vger.kernel.org
Subject: Re: [Question]should we not ignore the masked interrupt in regmap?
Date: Sat, 12 Oct 2013 13:32:17 +0100 [thread overview]
Message-ID: <20131012123217.GK2443@sirena.org.uk> (raw)
In-Reply-To: <CAK=oMXetPxaQ-MeL9L9+182X220ivu2G5+i-42kqtAUjbfvg2w@mail.gmail.com>
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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.
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next prev parent reply other threads:[~2013-10-12 12:32 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-10-12 3:14 yi zhang
2013-10-12 12:32 ` Mark Brown [this message]
2013-10-12 12:50 ` yi zhang
2013-10-12 15:40 ` Mark Brown
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