Commit 0680e20a authored by Siddharth Vadapalli's avatar Siddharth Vadapalli Committed by Jakub Kicinski
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net: ethernet: ti: am65-cpsw: Fix devlink port register sequence 



Renaming interfaces using udevd depends on the interface being registered
before its netdev is registered. Otherwise, udevd reads an empty
phys_port_name value, resulting in the interface not being renamed.

Fix this by registering the interface before registering its netdev
by invoking am65_cpsw_nuss_register_devlink() before invoking
register_netdev() for the interface.

Move the function call to devlink_port_type_eth_set(), invoking it after
register_netdev() is invoked, to ensure that netlink notification for the
port state change is generated after the netdev is completely initialized.

Fixes: 58356eb3 ("net: ti: am65-cpsw-nuss: Add devlink support")
Signed-off-by: default avatarSiddharth Vadapalli <s-vadapalli@ti.com>
Link: https://lore.kernel.org/r/20220706070208.12207-1-s-vadapalli@ti.com


Signed-off-by: default avatarJakub Kicinski <kuba@kernel.org>
parent 029c1c20

drivers/net/ethernet/ti/am65-cpsw-nuss.c

+10 −7
Original line number Diff line number Diff line
@@ -2467,7 +2467,6 @@ static int am65_cpsw_nuss_register_devlink(struct am65_cpsw_common *common) 
				port->port_id, ret);

			goto dl_port_unreg;

		}

		devlink_port_type_eth_set(dl_port, port->ndev);

	}

	devlink_register(common->devlink);

	return ret;
@@ -2511,6 +2510,7 @@ static void am65_cpsw_unregister_devlink(struct am65_cpsw_common *common) 
static int am65_cpsw_nuss_register_ndevs(struct am65_cpsw_common *common)

{

	struct device *dev = common->dev;

	struct devlink_port *dl_port;

	struct am65_cpsw_port *port;

	int ret = 0, i;
@@ -2527,6 +2527,10 @@ static int am65_cpsw_nuss_register_ndevs(struct am65_cpsw_common *common) 
		return ret;

	}



	ret = am65_cpsw_nuss_register_devlink(common);

	if (ret)

		return ret;



	for (i = 0; i < common->port_num; i++) {

		port = &common->ports[i];
@@ -2539,25 +2543,24 @@ static int am65_cpsw_nuss_register_ndevs(struct am65_cpsw_common *common) 
				i, ret);

			goto err_cleanup_ndev;

		}



		dl_port = &port->devlink_port;

		devlink_port_type_eth_set(dl_port, port->ndev);

	}



	ret = am65_cpsw_register_notifiers(common);

	if (ret)

		goto err_cleanup_ndev;



	ret = am65_cpsw_nuss_register_devlink(common);

	if (ret)

		goto clean_unregister_notifiers;



	/* can't auto unregister ndev using devm_add_action() due to

	 * devres release sequence in DD core for DMA

	 */



	return 0;

clean_unregister_notifiers:

	am65_cpsw_unregister_notifiers(common);



err_cleanup_ndev:

	am65_cpsw_nuss_cleanup_ndev(common);

	am65_cpsw_unregister_devlink(common);



	return ret;

}