netdev - Re: [PATCH] iavf: Fix hang during reboot/shutdown

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Date:   Thu, 17 Mar 2022 17:30:10 +0000
From:   patchwork-bot+netdevbpf@...nel.org
To:     Ivan Vecera <ivecera@...hat.com>
Cc:     netdev@...r.kernel.org, poros@...hat.com,
        jesse.brandeburg@...el.com, anthony.l.nguyen@...el.com,
        davem@...emloft.net, kuba@...nel.org, pabeni@...hat.com,
        slawomirx.laba@...el.com, mateusz.palczewski@...el.com,
        jacob.e.keller@...el.com, phani.r.burra@...el.com,
        intel-wired-lan@...ts.osuosl.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] iavf: Fix hang during reboot/shutdown

Hello:

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

On Thu, 17 Mar 2022 11:45:24 +0100 you wrote:
> Recent commit 974578017fc1 ("iavf: Add waiting so the port is
> initialized in remove") adds a wait-loop at the beginning of
> iavf_remove() to ensure that port initialization is finished
> prior unregistering net device. This causes a regression
> in reboot/shutdown scenario because in this case callback
> iavf_shutdown() is called and this callback detaches the device,
> makes it down if it is running and sets its state to __IAVF_REMOVE.
> Later shutdown callback of associated PF driver (e.g. ice_shutdown)
> is called. That callback calls among other things sriov_disable()
> that calls indirectly iavf_remove() (see stack trace below).
> As the adapter state is already __IAVF_REMOVE then the mentioned
> loop is end-less and shutdown process hangs.
> 
> [...]

Here is the summary with links:
  - iavf: Fix hang during reboot/shutdown
    https://git.kernel.org/netdev/net/c/b04683ff8f08

You are awesome, thank you!
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