netdev - Re: [PATCH] drivers: net: hippi: Fix deadlock in rr

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Message-Id: <165053161196.2072.5914610893205922675.git-patchwork-notify@kernel.org>
Date:   Thu, 21 Apr 2022 09:00:11 +0000
From:   patchwork-bot+netdevbpf@...nel.org
To:     Duoming Zhou <duoming@....edu.cn>
Cc:     linux-kernel@...r.kernel.org, jes@...ined-monkey.org,
        netdev@...r.kernel.org, linux-hippi@...site.dk, pabeni@...hat.com,
        kuba@...nel.org, davem@...emloft.net
Subject: Re: [PATCH] drivers: net: hippi: Fix deadlock in rr_close()

Hello:

This patch was applied to netdev/net.git (master)
by Paolo Abeni <pabeni@...hat.com>:

On Sun, 17 Apr 2022 20:55:19 +0800 you wrote:
> There is a deadlock in rr_close(), which is shown below:
> 
>    (Thread 1)                |      (Thread 2)
>                              | rr_open()
> rr_close()                   |  add_timer()
>  spin_lock_irqsave() //(1)   |  (wait a time)
>  ...                         | rr_timer()
>  del_timer_sync()            |  spin_lock_irqsave() //(2)
>  (wait timer to stop)        |  ...
> 
> [...]

Here is the summary with links:
  - drivers: net: hippi: Fix deadlock in rr_close()
    https://git.kernel.org/netdev/net/c/bc6de2878429

You are awesome, thank you!
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