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net: ethernet: ti: am65-cpsw: fix error handling in am65_cpsw_nuss_probe()

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[ Upstream commit 46fb651253 ]

The am65_cpsw_nuss_cleanup_ndev() function calls unregister_netdev()
even if register_netdev() fails, which triggers WARN_ON(1) in
unregister_netdevice_many(). To fix it, make sure that
unregister_netdev() is called only on registered netdev.

Compile tested only.

Fixes: 84b4aa4932 ("net: ethernet: ti: am65-cpsw: add multi port support in mac-only mode")
Signed-off-by: Zhang Changzhong <zhangchangzhong@huawei.com>
Reviewed-by: Maciej Fijalkowski <maciej.fijalkowski@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Zhang Changzhong 2022-11-24 11:03:08 +08:00 committed by Greg Kroah-Hartman
parent eaa5722549
commit e4ae978654
1 changed files with 1 additions and 1 deletions
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2
drivers/net/ethernet/ti/am65-cpsw-nuss.c
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@ -2061,7 +2061,7 @@ static void am65_cpsw_nuss_cleanup_ndev(struct am65_cpsw_common *common)
for (i = 0; i < common->port_num; i++) {
port = &common->ports[i];
if (port->ndev)
if (port->ndev && port->ndev->reg_state == NETREG_REGISTERED)
unregister_netdev(port->ndev);
}
}