netdev - Re: [PATCH net] net: phylink: avoid mvneta warning when setting pause parameters

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Date:   Thu, 28 Oct 2021 16:14:03 +0100
From:   "Russell King (Oracle)" <linux@...linux.org.uk>
To:     Jakub Kicinski <kuba@...nel.org>
Cc:     Andrew Lunn <andrew@...n.ch>,
        Heiner Kallweit <hkallweit1@...il.com>,
        "David S. Miller" <davem@...emloft.net>, netdev@...r.kernel.org
Subject: Re: [PATCH net] net: phylink: avoid mvneta warning when setting
 pause parameters

On Thu, Oct 28, 2021 at 08:06:07AM -0700, Jakub Kicinski wrote:
> On Thu, 28 Oct 2021 15:55:34 +0100 Russell King (Oracle) wrote:
> > mvneta does not support asymetric pause modes, and it flags this by the
> > lack of AsymPause in the supported field. When setting pause modes, we
> > check that pause->rx_pause == pause->tx_pause, but only when pause
> > autoneg is enabled. When pause autoneg is disabled, we still allow
> > pause->rx_pause != pause->tx_pause, which is incorrect when the MAC
> > does not support asymetric pause, and causes mvneta to issue a warning.
> > 
> > Fix this by removing the test for pause->autoneg, so we always check
> > that pause->rx_pause == pause->tx_pause for network devices that do not
> > support AsymPause.
> 
> Fixes..?

If people care...

Fixes: 9525ae83959b ("phylink: add phylink infrastructure")

but since no one reported the issue, I'd be tempted not to backport
the patch until there's a need to do so. Especially as it's going
to have conflicts.

-- 
RMK's Patch system: https://www.armlinux.org.uk/developer/patches/
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