linux-kernel - Re: [PATCH 5.10 079/122] net: phylink: add suspend/resume support

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Message-ID: <YUrxBtx6e8qdR6Cl@kroah.com>
Date:   Wed, 22 Sep 2021 11:01:58 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     Pavel Machek <pavel@...x.de>
Cc:     "Russell King (Oracle)" <linux@...linux.org.uk>,
        linux-kernel@...r.kernel.org, stable@...r.kernel.org,
        Joakim Zhang <qiangqing.zhang@....com>,
        "David S. Miller" <davem@...emloft.net>,
        Sasha Levin <sashal@...nel.org>
Subject: Re: [PATCH 5.10 079/122] net: phylink: add suspend/resume support

On Wed, Sep 22, 2021 at 10:58:02AM +0200, Greg Kroah-Hartman wrote:
> On Tue, Sep 21, 2021 at 11:45:28PM +0200, Pavel Machek wrote:
> > Hi!
> > 
> > > > > Joakim Zhang reports that Wake-on-Lan with the stmmac ethernet driver broke
> > > > > when moving the incorrect handling of mac link state out of mac_config().
> > > > > This reason this breaks is because the stmmac's WoL is handled by the MAC
> > > > > rather than the PHY, and phylink doesn't cater for that scenario.
> > > > > 
> > > > > This patch adds the necessary phylink code to handle suspend/resume events
> > > > > according to whether the MAC still needs a valid link or not. This is the
> > > > > barest minimum for this support.
> > > > 
> > > > This adds functions that end up being unused in 5.10. AFAICT we do not
> > > > need this in 5.10.
> > > 
> > > It needs to be backported to any kernel that also has
> > > "net: stmmac: fix MAC not working when system resume back with WoL active"
> > > backported to. From what I can tell, the fixes line in that commit
> > > refers to a commit (46f69ded988d) in v5.7-rc1.
> > > 
> > > If "net: stmmac: fix MAC not working when system resume back with WoL
> > > active" is not being backported to 5.10, then there is no need to
> > > backport this patch.
> > 
> > Agreed.
> > 
> > > As I'm not being copied on the stmmac commit, I've no idea which kernels
> > > this patch should be backported to.
> > 
> > AFAICT "net: stmmac: fix MAC not working when..." is not queued for
> > 5.10.68-rc1 or 5.14.7-rc1.
> 
> I can easily do that, thanks!

Only applied to 5.14, so I'll drop this patch from the 5.10 queue.

thanks,

greg k-h