From: Zhang Changzhong <zhangchangzhong@huawei.com>
To: "David S. Miller" <davem@davemloft.net>,
Eric Dumazet <edumazet@google.com>,
Jakub Kicinski <kuba@kernel.org>, Paolo Abeni <pabeni@redhat.com>,
Grygorii Strashko <grygorii.strashko@ti.com>,
"Jesse Brandeburg" <jesse.brandeburg@intel.com>
Cc: Zhang Changzhong <zhangchangzhong@huawei.com>,
<netdev@vger.kernel.org>, <linux-kernel@vger.kernel.org>
Subject: [PATCH net] net: ethernet: ti: am65-cpsw: fix error handling in am65_cpsw_nuss_probe()
Date: Thu, 24 Nov 2022 11:03:08 +0800 [thread overview]
Message-ID: <1669258989-18277-1-git-send-email-zhangchangzhong@huawei.com> (raw)
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: 84b4aa493249 ("net: ethernet: ti: am65-cpsw: add multi port support in mac-only mode")
Signed-off-by: Zhang Changzhong <zhangchangzhong@huawei.com>
---
drivers/net/ethernet/ti/am65-cpsw-nuss.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/net/ethernet/ti/am65-cpsw-nuss.c b/drivers/net/ethernet/ti/am65-cpsw-nuss.c
index c50b137..d04a239 100644
--- a/drivers/net/ethernet/ti/am65-cpsw-nuss.c
+++ b/drivers/net/ethernet/ti/am65-cpsw-nuss.c
@@ -2082,7 +2082,7 @@ 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);
}
}
--
2.9.5
next reply other threads:[~2022-11-24 2:43 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-11-24 3:03 Zhang Changzhong [this message]
2022-11-25 14:36 ` [PATCH net] net: ethernet: ti: am65-cpsw: fix error handling in am65_cpsw_nuss_probe() Maciej Fijalkowski
2022-11-28 11:10 ` patchwork-bot+netdevbpf
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