linux-kernel - Re: [PATCH 3/9] net: ethernet: ti: cpts: rework initialization/deinitialization

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Date:   Wed, 14 Sep 2016 22:32:17 +0200
From:   Richard Cochran <richardcochran@...il.com>
To:     Grygorii Strashko <grygorii.strashko@...com>
Cc:     "David S. Miller" <davem@...emloft.net>, netdev@...r.kernel.org,
        Mugunthan V N <mugunthanvnm@...com>,
        Sekhar Nori <nsekhar@...com>, linux-kernel@...r.kernel.org,
        linux-omap@...r.kernel.org, WingMan Kwok <w-kwok2@...com>
Subject: Re: [PATCH 3/9] net: ethernet: ti: cpts: rework
 initialization/deinitialization

On Wed, Sep 14, 2016 at 11:10:48PM +0300, Grygorii Strashko wrote:
> On 09/14/2016 04:52 PM, Richard Cochran wrote:
> > On Wed, Sep 14, 2016 at 04:02:25PM +0300, Grygorii Strashko wrote:

> >> -	if (!cpts->rx_enable)
> >> +	if (!cpts || !cpts->rx_enable)
> >>  		return;

> Ok. I can't say I'd like all this checks, but there are internal requirement 
> to allow CPTS to be disabled though DT on KS2 (even if built in).
> I'd try to clarify and return back here.
> 
> But It'll be good to know your position - acceptable/can be discussed/completely unacceptable?

Look at that code snippet.  We already test for @cpts->rx_enable.  If
you want to disable cpts at run time, just avoid setting that field.
There is no need for any new tests or return codes.

Thanks,
Richard