linux-kernel - Re: [PATCH 5/5] i2c: octeon,thunderx: Limit register access retries

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Message-ID: <20160921210335.GG1513@katana>
Date:   Wed, 21 Sep 2016 23:03:35 +0200
From:   Wolfram Sang <wsa@...-dreams.de>
To:     Jan Glauber <jglauber@...ium.com>
Cc:     linux-kernel@...r.kernel.org, linux-i2c@...r.kernel.org
Subject: Re: [PATCH 5/5] i2c: octeon,thunderx: Limit register access retries

On Wed, Sep 21, 2016 at 08:51:06AM +0200, Jan Glauber wrote:
> Do not infinitely retry register readq and writeq operations
> in order to not lock up the CPU in case the TWSI gets stuck.
> 
> Return -EIO in case of a failed data read. For all other
> cases just return so subsequent operations will fail
> and trigger the recovery.
> 
> Signed-off-by: Jan Glauber <jglauber@...ium.com>

I didn't really check, but have you considered using
readq_poll_timeout() from iopoll.h?


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