linux-kernel - Re: [PATCH 6/6] ptp_ocelot: support 4 programmable pins

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Message-ID: <20200326135941.GA20841@localhost>
Date:   Thu, 26 Mar 2020 06:59:41 -0700
From:   Richard Cochran <richardcochran@...il.com>
To:     "Y.b. Lu" <yangbo.lu@....com>
Cc:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "David S . Miller" <davem@...emloft.net>,
        Vladimir Oltean <vladimir.oltean@....com>,
        Claudiu Manoil <claudiu.manoil@....com>,
        Andrew Lunn <andrew@...n.ch>,
        Vivien Didelot <vivien.didelot@...il.com>,
        Florian Fainelli <f.fainelli@...il.com>,
        Alexandre Belloni <alexandre.belloni@...tlin.com>,
        Microchip Linux Driver Support <UNGLinuxDriver@...rochip.com>
Subject: Re: [PATCH 6/6] ptp_ocelot: support 4 programmable pins

On Thu, Mar 26, 2020 at 09:34:52AM +0000, Y.b. Lu wrote:
> > Of course, that is horrible, and I am going to find a way to fix it.
> 
> Thanks a lot.
> Do you think it is ok to move protection into ptp_set_pinfunc() to protect just pin_config accessing?
> ptp_disable_pinfunc() not touching pin_config could be out of protection.
> But it seems indeed total ptp_set_pinfunc() should be under protection...

Yes, and I have way to fix that.  I will post a patch soon...

> I could modify commit messages to indicate the pin supports both PTP_PF_PEROUT and PTP_PF_EXTTS, and PTP_PF_EXTTS support will be added in the future.

Thanks for explaining.  Since you do have programmable pin, please
wait for my patch to fix the deadlock.

Thanks,
Richard