linux-kernel - Re: [PATCH] net/ncsi: Avoid channel

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Date:   Tue, 30 Mar 2021 20:20:08 +0000
From:   patchwork-bot+netdevbpf@...nel.org
To:     Eddie James <eajames@...ux.ibm.com>
Cc:     sam@...dozajonas.com, davem@...emloft.net, kuba@...nel.org,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        miltonm@...ibm.com
Subject: Re: [PATCH] net/ncsi: Avoid channel_monitor hrtimer deadlock

Hello:

This patch was applied to netdev/net.git (refs/heads/master):

On Mon, 29 Mar 2021 10:20:39 -0500 you wrote:
> From: Milton Miller <miltonm@...ibm.com>
> 
> Calling ncsi_stop_channel_monitor from channel_monitor is a guaranteed
> deadlock on SMP because stop calls del_timer_sync on the timer that
> inoked channel_monitor as its timer function.
> 
> Recognise the inherent race of marking the monitor disabled before
> deleting the timer by just returning if enable was cleared.  After
> a timeout (the default case -- reset to START when response received)
> just mark the monitor.enabled false.
> 
> [...]

Here is the summary with links:
  - net/ncsi: Avoid channel_monitor hrtimer deadlock
    https://git.kernel.org/netdev/net/c/03cb4d05b4ea

You are awesome, thank you!
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