linux-kernel - Re: [PATCH v2 net-next 1/9] net: enetc: fix MAC Merge layer remaining enabled until a link down event

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Message-ID: <ZEJQ8JxeiZ1sxTqP@corigine.com>
Date:   Fri, 21 Apr 2023 11:01:36 +0200
From:   Simon Horman <simon.horman@...igine.com>
To:     Vladimir Oltean <vladimir.oltean@....com>
Cc:     netdev@...r.kernel.org, "David S. Miller" <davem@...emloft.net>,
        Michal Kubecek <mkubecek@...e.cz>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        Claudiu Manoil <claudiu.manoil@....com>,
        Xiaoliang Yang <xiaoliang.yang_1@....com>,
        Petr Machata <petrm@...dia.com>,
        Danielle Ratson <danieller@...dia.com>,
        Pranavi Somisetty <pranavi.somisetty@....com>,
        Harini Katakam <harini.katakam@....com>,
        Vinicius Costa Gomes <vinicius.gomes@...el.com>,
        Kurt Kanzenbach <kurt@...utronix.de>,
        Gerhard Engleder <gerhard@...leder-embedded.com>,
        Ferenc Fejes <ferenc.fejes@...csson.com>,
        Aaron Conole <aconole@...hat.com>,
        linux-kselftest@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 net-next 1/9] net: enetc: fix MAC Merge layer
 remaining enabled until a link down event

On Thu, Apr 20, 2023 at 08:03:54PM +0300, Vladimir Oltean wrote:
> On Thu, Apr 20, 2023 at 04:22:04PM +0200, Simon Horman wrote:
> > > -	/* If link is up, enable MAC Merge right away */
> > > -	if (!!(priv->active_offloads & ENETC_F_QBU) &&
> > > -	    !(val & ENETC_MMCSR_LINK_FAIL))
> > > -		val |= ENETC_MMCSR_ME;
> > > +	/* If link is up, enable/disable MAC Merge right away */
> > > +	if (!(val & ENETC_MMCSR_LINK_FAIL)) {
> > > +		if (!!(priv->active_offloads & ENETC_F_QBU))
> > 
> > nit: The !!() seems unnecessary,
> >      I wonder if it can be written in a simpler way as:
> > 
> > 		if (priv->active_offloads & ENETC_F_QBU)
> 
> I agree. Normally I omit the double negation in simple statements like this.
> Here I didn't, because the expression was split into 2 "if" conditions,
> and I kept the individual terms as-is for some reason.
> 
> Since the generated object code is absolutely the same either way, I would not
> resend just for minor style comments such as this one, if you don't mind.
> However, I do appreciate the review and I'll pay more attention to this
> detail in the future.

Thanks. I agree the result should be same.
No need to resend because of this.