linux-kernel - Re: [PATCH] mvneta: implement SGMII-based in-band link state signaling

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Message-ID: <551E64BC.6080203@list.ru>
Date:	Fri, 03 Apr 2015 13:00:28 +0300
From:	Stas Sergeev <stsp@...t.ru>
To:	David Miller <davem@...emloft.net>
CC:	netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
	thomas.petazzoni@...e-electrons.com, f.fainelli@...il.com,
	Stas Sergeev <stsp@...rs.sourceforge.net>
Subject: Re: [PATCH] mvneta: implement SGMII-based in-band link state signaling

03.04.2015 03:51, David Miller пишет:
> From: Stas Sergeev <stsp@...t.ru>
> Date: Tue, 31 Mar 2015 16:24:59 +0300
> 
>> @@ -2590,6 +2651,7 @@ static int mvneta_mdio_probe(struct mvneta_port *pp)
>>
>>  static void mvneta_mdio_remove(struct mvneta_port *pp)
>>  {
>> +	fixed_phy_set_link_update(pp->phy_dev, NULL);
> 
> I do not see any other driver doing this on shutdown.
> Please show me why it is necessary.
Hello David, sorry for this being discussed in a different thread,
so here you have a few pointers to why is this needed:
https://lkml.org/lkml/2015/3/30/367

> And if it is, all other drivers registering a fixed phy link update
> function need to be adjusted to do the same thing.
Or, for example, get rid of the callback and add an API:
http://www.spinics.net/lists/netdev/msg323517.html

Then you get the patch that avoids all this call-back singing and dancing:
http://www.spinics.net/lists/netdev/msg323518.html

In any case, I posted 3 different implementations and hope
people will choose the best one (any choice is fine with me).
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