ixgbe: prevent from unwanted interface name changes

JIRA: https://issues.redhat.com/browse/RHEL-109607

commit e67a0bc
Author: Jedrzej Jagielski <[email protected]>
Date:   Thu Jul 3 12:41:15 2025 +0200

    ixgbe: prevent from unwanted interface name changes

    Users of the ixgbe driver report that after adding devlink support by
    the commit a028523 ("ixgbe: add initial devlink support") their
    configs got broken due to unwanted changes of interface names. It's
    caused by automatic phys_port_name generation during devlink port
    initialization flow.

    To prevent from that set no_phys_port_name flag for ixgbe devlink ports.

    Reported-by: David Howells <[email protected]>
    Closes: https://lore.kernel.org/netdev/[email protected]/
    Reported-by: David Kaplan <[email protected]>
    Closes: https://lore.kernel.org/netdev/LV3PR12MB92658474624CCF60220157199470A@LV3PR12MB9265.namprd12.prod.outlook.com/
    Fixes: a028523 ("ixgbe: add initial devlink support")
    Signed-off-by: Jedrzej Jagielski <[email protected]>
    Tested-by: Rinitha S <[email protected]> (A Contingent worker at Intel)
    Signed-off-by: Tony Nguyen <[email protected]>

Signed-off-by: CKI Backport Bot <[email protected]>
Signed-off-by: Michal Schmidt <[email protected]>

Author: CKI Backport Bot

drivers/net/ethernet/intel/ixgbe/devlink/devlink.c

@@ -543,6 +543,7 @@ int ixgbe_devlink_register_port(struct ixgbe_adapter *adapter)
 
 	attrs.flavour = DEVLINK_PORT_FLAVOUR_PHYSICAL;
 	attrs.phys.port_number = adapter->hw.bus.func;
+	attrs.no_phys_port_name = 1;
 	ixgbe_devlink_set_switch_id(adapter, &attrs.switch_id);
 
 	devlink_port_attrs_set(devlink_port, &attrs);