linux-kernel - Re: [PATCH net-next v3 2/6] net: dsa: qca: ar9331: make proper initial port defaults

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Message-ID: <YQhLSg3Vr1pvVHsW@lunn.ch>
Date:   Mon, 2 Aug 2021 21:45:14 +0200
From:   Andrew Lunn <andrew@...n.ch>
To:     Vladimir Oltean <olteanv@...il.com>
Cc:     Oleksij Rempel <o.rempel@...gutronix.de>,
        Vivien Didelot <vivien.didelot@...il.com>,
        Florian Fainelli <f.fainelli@...il.com>,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Russell King <linux@...linux.org.uk>,
        Pengutronix Kernel Team <kernel@...gutronix.de>,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-mips@...r.kernel.org
Subject: Re: [PATCH net-next v3 2/6] net: dsa: qca: ar9331: make proper
 initial port defaults

> > +/* AGE_TIME_COEF is not documented. This is "works for me" value */
> > +#define AR9331_SW_AT_AGE_TIME_COEF		6900
> 
> Not documented, not used either, it seems.
> "Works for you" based on what?

It is used in a later patch. Ideally it would of been introduced in
that patch to make this more obvious.

> >  #define AR9331_SW_REG_MDIO_CTRL			0x98
> >  #define AR9331_SW_MDIO_CTRL_BUSY		BIT(31)
> >  #define AR9331_SW_MDIO_CTRL_MASTER_EN		BIT(30)
> > @@ -101,6 +111,46 @@
> >  	 AR9331_SW_PORT_STATUS_RX_FLOW_EN | AR9331_SW_PORT_STATUS_TX_FLOW_EN | \
> >  	 AR9331_SW_PORT_STATUS_SPEED_M)
> 
> Is this patch material for "net"? If standalone ports is all that ar9331
> supports, then it would better not do packet forwarding in lack of a
> bridge device.

It does seem like this patch should be considered for stable, if by
default all ports can talk with all ports when not part of a bridge.

	Andrew