netdev - Re: [PATCH net] net: enetc: avoid deadlock in enetc_tx_onestep

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Date:   Sat, 14 Jan 2023 05:40:16 +0000
From:   patchwork-bot+netdevbpf@...nel.org
To:     Vladimir Oltean <vladimir.oltean@....com>
Cc:     netdev@...r.kernel.org, davem@...emloft.net, edumazet@...gle.com,
        kuba@...nel.org, pabeni@...hat.com, claudiu.manoil@....com,
        yangbo.lu@....com
Subject: Re: [PATCH net] net: enetc: avoid deadlock in enetc_tx_onestep_tstamp()

Hello:

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

On Thu, 12 Jan 2023 12:54:40 +0200 you wrote:
> This lockdep splat says it better than I could:
> 
> ================================
> WARNING: inconsistent lock state
> 6.2.0-rc2-07010-ga9b9500ffaac-dirty #967 Not tainted
> --------------------------------
> inconsistent {IN-SOFTIRQ-W} -> {SOFTIRQ-ON-W} usage.
> kworker/1:3/179 [HC0[0]:SC0[0]:HE1:SE1] takes:
> ffff3ec4036ce098 (_xmit_ETHER#2){+.?.}-{3:3}, at: netif_freeze_queues+0x5c/0xc0
> {IN-SOFTIRQ-W} state was registered at:
>   _raw_spin_lock+0x5c/0xc0
>   sch_direct_xmit+0x148/0x37c
>   __dev_queue_xmit+0x528/0x111c
>   ip6_finish_output2+0x5ec/0xb7c
>   ip6_finish_output+0x240/0x3f0
>   ip6_output+0x78/0x360
>   ndisc_send_skb+0x33c/0x85c
>   ndisc_send_rs+0x54/0x12c
>   addrconf_rs_timer+0x154/0x260
>   call_timer_fn+0xb8/0x3a0
>   __run_timers.part.0+0x214/0x26c
>   run_timer_softirq+0x3c/0x74
>   __do_softirq+0x14c/0x5d8
>   ____do_softirq+0x10/0x20
>   call_on_irq_stack+0x2c/0x5c
>   do_softirq_own_stack+0x1c/0x30
>   __irq_exit_rcu+0x168/0x1a0
>   irq_exit_rcu+0x10/0x40
>   el1_interrupt+0x38/0x64
> irq event stamp: 7825
> hardirqs last  enabled at (7825): [<ffffdf1f7200cae4>] exit_to_kernel_mode+0x34/0x130
> hardirqs last disabled at (7823): [<ffffdf1f708105f0>] __do_softirq+0x550/0x5d8
> softirqs last  enabled at (7824): [<ffffdf1f7081050c>] __do_softirq+0x46c/0x5d8
> softirqs last disabled at (7811): [<ffffdf1f708166e0>] ____do_softirq+0x10/0x20
> 
> [...]

Here is the summary with links:
  - [net] net: enetc: avoid deadlock in enetc_tx_onestep_tstamp()
    https://git.kernel.org/netdev/net/c/3c463721a73b

You are awesome, thank you!
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