netdev - Re: [v4 PATCH net] net: enetc: fix the deadlock of enetc_mdio

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Message-Id: 
 <176074380701.2822953.14692637268674439157.git-patchwork-notify@kernel.org>
Date: Fri, 17 Oct 2025 23:30:07 +0000
From: patchwork-bot+netdevbpf@...nel.org
To: Jianpeng Chang <jianpeng.chang.cn@...driver.com>
Cc: claudiu.manoil@....com, vladimir.oltean@....com, wei.fang@....com,
 xiaoning.wang@....com, andrew+netdev@...n.ch, davem@...emloft.net,
 edumazet@...gle.com, kuba@...nel.org, pabeni@...hat.com,
 alexandru.marginean@....com, imx@...ts.linux.dev, netdev@...r.kernel.org,
 linux-kernel@...r.kernel.org
Subject: Re: [v4 PATCH net] net: enetc: fix the deadlock of enetc_mdio_lock

Hello:

This patch was applied to netdev/net.git (main)
by Jakub Kicinski <kuba@...nel.org>:

On Wed, 15 Oct 2025 10:14:27 +0800 you wrote:
> After applying the workaround for err050089, the LS1028A platform
> experiences RCU stalls on RT kernel. This issue is caused by the
> recursive acquisition of the read lock enetc_mdio_lock. Here list some
> of the call stacks identified under the enetc_poll path that may lead to
> a deadlock:
> 
> enetc_poll
>   -> enetc_lock_mdio
>   -> enetc_clean_rx_ring OR napi_complete_done
>      -> napi_gro_receive
>         -> enetc_start_xmit
>            -> enetc_lock_mdio
>            -> enetc_map_tx_buffs
>            -> enetc_unlock_mdio
>   -> enetc_unlock_mdio
> 
> [...]

Here is the summary with links:
  - [v4,net] net: enetc: fix the deadlock of enetc_mdio_lock
    https://git.kernel.org/netdev/net/c/50bd33f6b392

You are awesome, thank you!
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