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

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Date:   Wed, 22 Sep 2021 10:58:02 +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 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!

greg k-h