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Message-ID: <20200415163120.GC2830@ninjato>
Date: Wed, 15 Apr 2020 18:31:20 +0200
From: Wolfram Sang <wsa@...-dreams.de>
To: Dmitry Osipenko <digetx@...il.com>
Cc: Thierry Reding <thierry.reding@...il.com>,
Jonathan Hunter <jonathanh@...dia.com>,
Laxman Dewangan <ldewangan@...dia.com>,
linux-i2c@...r.kernel.org, linux-tegra@...r.kernel.org,
linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 1/2] i2c: tegra: Better handle case where CPU0 is busy
for a long time
On Tue, Mar 24, 2020 at 10:12:16PM +0300, Dmitry Osipenko wrote:
> Boot CPU0 always handle I2C interrupt and under some rare circumstances
> (like running KASAN + NFS root) it may stuck in uninterruptible state for
> a significant time. In this case we will get timeout if I2C transfer is
> running on a sibling CPU, despite of IRQ being raised. In order to handle
> this rare condition, the IRQ status needs to be checked after completion
> timeout.
>
> Signed-off-by: Dmitry Osipenko <digetx@...il.com>
Applied to for-current, thanks!
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