linux-kernel - Re: [PATCH 5/6] i2c: tegra: Add runtime power-management support

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Date:   Fri, 26 Aug 2016 00:31:31 +0200
From:   Wolfram Sang <wsa@...-dreams.de>
To:     Jon Hunter <jonathanh@...dia.com>
Cc:     Laxman Dewangan <ldewangan@...dia.com>,
        Stephen Warren <swarren@...dotorg.org>,
        Thierry Reding <thierry.reding@...il.com>,
        Alexandre Courbot <gnurou@...il.com>,
        linux-i2c@...r.kernel.org, linux-tegra@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 5/6] i2c: tegra: Add runtime power-management support


> > You could have left the original 'return' instead of the 2 new ones, but
> > you decide.
> 
> Yes I know, but I wanted to ensure for runtime-pm we only return 0 on
> success. Yes clk_enable should only return 0 on success and a negative
> error code otherwise, but I prefer this. So will leave as-is.

OK.

> 
> >> -	if (tegra_i2c_flush_fifos(i2c_dev))
> >> -		err = -ETIMEDOUT;
> >> +	err = tegra_i2c_flush_fifos(i2c_dev);
> > 
> > 'err' is assigned but where is it checked?
> 
> It will be returned by the function. This is no different to how it
> works today if you look at the code. I did think about checking it right

I agree. I missed it before, thanks for the heads up.


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