[PATCH net-next v2] net: dsa: mt7530: do not set MT7530_P5_DIS when PHY muxing is being used

[Andrew Lunn]

On Sun, Apr 28, 2024 at 12:19:58PM +0300, Arınç ÜNAL via B4 Relay wrote:
> From: Arınç ÜNAL <arinc.unal at arinc9.com>
> 
> DSA initalises the ds->num_ports amount of ports in
> dsa_switch_touch_ports(). When the PHY muxing feature is in use, port 5
> won't be defined in the device tree. Because of this, the type member of
> the dsa_port structure for this port will be assigned DSA_PORT_TYPE_UNUSED.
> The dsa_port_setup() function calls ds->ops->port_disable() when the port
> type is DSA_PORT_TYPE_UNUSED.
> 
> The MT7530_P5_DIS bit is unset in mt7530_setup() when PHY muxing is being
> used. mt7530_port_disable() which is assigned to ds->ops->port_disable() is
> called afterwards. Currently, mt7530_port_disable() sets MT7530_P5_DIS
> which breaks network connectivity when PHY muxing is being used.
> 
> Therefore, do not set MT7530_P5_DIS when PHY muxing is being used.
> 
> Fixes: 377174c5760c ("net: dsa: mt7530: move MT753X_MTRAP operations for MT7530")
> Reported-by: Daniel Golle <daniel at makrotopia.org>
> Signed-off-by: Arınç ÜNAL <arinc.unal at arinc9.com>

Reviewed-by: Andrew Lunn <andrew at lunn.ch>

    Andrew