From mboxrd@z Thu Jan  1 00:00:00 1970
From: Thierry Reding <thierry.reding@gmail.com>
Subject: Re: [PATCH v1] mfd: tps6586x: Move interrupt handling into workqueue
Date: Mon, 14 May 2018 13:51:35 +0200
Message-ID: <20180514115135.GG18312@ulmo>
References: <20180513211842.7819-1-digetx@gmail.com>
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To: Dmitry Osipenko <digetx@gmail.com>
Cc: Lee Jones <lee.jones@linaro.org>, Jonathan Hunter <jonathanh@nvidia.com>, linux-tegra@vger.kernel.org, linux-i2c@vger.kernel.org, linux-kernel@vger.kernel.org
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On Mon, May 14, 2018 at 12:18:42AM +0300, Dmitry Osipenko wrote:
> Reading of status register within the interrupt handler fails with -EAGAIN
> if I2C is busy with handling some other request at the same time. Move the
> actual interrupt handling into a workqueue to avoid the unfortunate I2C
> failure and to avoid hanging CPU in interrupt up to 1 second (transfer
> timeout in the Tegra I2C driver).
>=20
> Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
> ---
>  drivers/mfd/tps6586x.c | 40 +++++++++++++++++++++++++++++-----------
>  1 file changed, 29 insertions(+), 11 deletions(-)

Could this not be achieved with a threaded interrupt handler?

Thierry

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