From: Florian Fainelli <f.fainelli@gmail.com>
To: Vladimir Oltean <olteanv@gmail.com>,
Oleksij Rempel <o.rempel@pengutronix.de>
Cc: Woojung Huh <woojung.huh@microchip.com>,
UNGLinuxDriver@microchip.com, Andrew Lunn <andrew@lunn.ch>,
Vivien Didelot <vivien.didelot@gmail.com>,
"David S. Miller" <davem@davemloft.net>,
Jakub Kicinski <kuba@kernel.org>,
kernel@pengutronix.de, netdev@vger.kernel.org,
linux-kernel@vger.kernel.org,
Russell King <linux@armlinux.org.uk>,
Michael Grzeschik <m.grzeschik@pengutronix.de>
Subject: Re: [PATCH net-next v4 8/9] net: dsa: dsa_slave_phy_connect(): extend phy's flags with port specific phy flags
Date: Fri, 11 Jun 2021 16:26:33 -0700 [thread overview]
Message-ID: <97ea2ff1-d3a3-b2d5-f829-3863409bfecc@gmail.com> (raw)
In-Reply-To: <20210611192417.gvfxi2kbfjx4jv3d@skbuf>
On 6/11/2021 12:24 PM, Vladimir Oltean wrote:
> On Fri, Jun 11, 2021 at 09:15:26AM +0200, Oleksij Rempel wrote:
>> This patch extends the flags of the phy that's being connected with the
>> port specific flags of the switch port.
>>
>> This is needed to handle a port specific erratum of the KSZ8873 switch,
>> which is added in a later patch.
>>
>> Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de>
>> ---
>
> What happens differently between having this patch and not having it?
The current get_phy_flags() is only processed when we connect to a PHY
via a designed phy-handle property via phylink_of_phy_connect((, but if
we fallback on the internal MDIO bus created by a switch and take the
dsa_slave_phy_connect() path then we would not be processing that flag
and using it at PHY connection time. Oleksij, your proposed patch fails
to check that dsa_switch_ops::get_phy_flags is actually non-NULL, how
about this approach instead where we only fetch the flags once, and we
deal with an option get_phy_flags callback too:
diff --git a/net/dsa/slave.c b/net/dsa/slave.c
index d4756b920108..ba7866ec946f 100644
--- a/net/dsa/slave.c
+++ b/net/dsa/slave.c
@@ -1749,7 +1749,7 @@ static void dsa_slave_phylink_fixed_state(struct
phylink_config *config,
}
/* slave device setup
*******************************************************/
-static int dsa_slave_phy_connect(struct net_device *slave_dev, int addr)
+static int dsa_slave_phy_connect(struct net_device *slave_dev, int
addr, u32 flags)
{
struct dsa_port *dp = dsa_slave_to_port(slave_dev);
struct dsa_switch *ds = dp->ds;
@@ -1760,6 +1760,8 @@ static int dsa_slave_phy_connect(struct net_device
*slave_dev, int addr)
return -ENODEV;
}
+ slave_dev->phydev->dev_flags |= flags;
+
return phylink_connect_phy(dp->pl, slave_dev->phydev);
}
@@ -1804,7 +1806,7 @@ static int dsa_slave_phy_setup(struct net_device
*slave_dev)
/* We could not connect to a designated PHY or SFP, so
try to
* use the switch internal MDIO bus instead
*/
- ret = dsa_slave_phy_connect(slave_dev, dp->index);
+ ret = dsa_slave_phy_connect(slave_dev, dp->index,
phy_flags);
if (ret) {
netdev_err(slave_dev,
"failed to connect to port %d: %d\n",
--
Florian
next prev parent reply other threads:[~2021-06-11 23:27 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-06-11 7:15 [PATCH net-next v4 0/9] provide cable test support for the ksz886x switch Oleksij Rempel
2021-06-11 7:15 ` [PATCH net-next v4 1/9] net: phy: micrel: move phy reg offsets to common header Oleksij Rempel
2021-06-11 19:09 ` Vladimir Oltean
2021-06-11 23:27 ` Florian Fainelli
2021-06-11 7:15 ` [PATCH net-next v4 2/9] net: dsa: microchip: ksz8795: add phylink support Oleksij Rempel
2021-06-11 19:11 ` Vladimir Oltean
2021-06-11 23:28 ` Florian Fainelli
2021-06-11 7:15 ` [PATCH net-next v4 3/9] net: phy: micrel: use consistent alignments Oleksij Rempel
2021-06-11 19:12 ` Vladimir Oltean
2021-06-11 23:28 ` Florian Fainelli
2021-06-11 7:15 ` [PATCH net-next v4 4/9] net: phy: micrel: apply resume errata workaround for ksz8873 and ksz8863 Oleksij Rempel
2021-06-11 19:20 ` Vladimir Oltean
2021-06-12 4:26 ` Oleksij Rempel
2021-06-12 15:13 ` Vladimir Oltean
2021-06-14 6:55 ` Oleksij Rempel
2021-06-11 7:15 ` [PATCH net-next v4 5/9] net: phy/dsa micrel/ksz886x add MDI-X support Oleksij Rempel
2021-06-12 18:14 ` Andrew Lunn
2021-06-13 2:05 ` Florian Fainelli
2021-06-11 7:15 ` [PATCH net-next v4 6/9] net: phy: micrel: ksz8081 " Oleksij Rempel
2021-06-12 18:14 ` Andrew Lunn
2021-06-13 2:05 ` Florian Fainelli
2021-06-11 7:15 ` [PATCH net-next v4 7/9] net: dsa: microchip: ksz8795: add LINK_MD register support Oleksij Rempel
2021-06-12 18:16 ` Andrew Lunn
2021-06-13 2:09 ` Florian Fainelli
2021-06-11 7:15 ` [PATCH net-next v4 8/9] net: dsa: dsa_slave_phy_connect(): extend phy's flags with port specific phy flags Oleksij Rempel
2021-06-11 19:24 ` Vladimir Oltean
2021-06-11 23:26 ` Florian Fainelli [this message]
2021-06-14 3:37 ` Oleksij Rempel
2021-06-14 3:34 ` Oleksij Rempel
2021-06-11 7:15 ` [PATCH net-next v4 9/9] net: phy: micrel: ksz886x/ksz8081: add cabletest support Oleksij Rempel
2021-06-12 18:23 ` Andrew Lunn
2021-06-14 3:51 ` Oleksij Rempel
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