linux-kernel - Re: [PATCH] net/ethernet: update ret when ptp

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Message-ID: <20201107150702.GC9653@hoboy.vegasvil.org>
Date:   Sat, 7 Nov 2020 07:07:02 -0800
From:   Richard Cochran <richardcochran@...il.com>
To:     Grygorii Strashko <grygorii.strashko@...com>
Cc:     Wang Qing <wangqing@...o.com>,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Samuel Zou <zou_wei@...wei.com>,
        Kurt Kanzenbach <kurt@...utronix.de>, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] net/ethernet: update ret when ptp_clock is ERROR

On Fri, Nov 06, 2020 at 01:34:04PM +0200, Grygorii Strashko wrote:
> And ptp_clock_register() can return NULL only if PTP support is disabled.

Not true in general ...

> In which case, we should not even get here.

only because the Kconfig uses "depends on" instead of "implies"
PTP_1588_CLOCK.

> So, I'd propose to s/IS_ERR_OR_NULL/IS_ERR above,
> and just assign ret = PTR_ERR(cpts->ptp_clock) here.

No, please no -- don't make another bad example for people to
copy/paste.

Thanks,
Richard