Re: [PATCH 4/5] i2c: octeon,thunderx: Check bus state before starting a transaction

From: Jan Glauber
Date: Thu Sep 22 2016 - 12:25:01 EST

On Wed, Sep 21, 2016 at 10:55:41PM +0200, Wolfram Sang wrote:
> On Wed, Sep 21, 2016 at 08:51:05AM +0200, Jan Glauber wrote:
> > Add an additional status check before starting a transaction and,
> > if required, trigger the recovery if the check fails.
> >
> > Signed-off-by: Jan Glauber <jglauber@xxxxxxxxxx>
> Won't this break multi-master setups?

I'm afraid yes. I don't have a multi-master setup, but agree that we
should not break it.

How about re-checking if the bus is idle until a timeout
(i2c->adap.timeout ?) happens and only then recover?

Additionaly we can check for arbitration loss as Dmitry did in his
original patch.