linux-kernel - Re: [PATCH v4] net: dsa: mv88e6xxx: propperly shutdown PPU re-enable timer on destroy

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Message-Id: 
 <174371883723.2702664.483595535919896131.git-patchwork-notify@kernel.org>
Date: Thu, 03 Apr 2025 22:20:37 +0000
From: patchwork-bot+netdevbpf@...nel.org
To: David Oberhollenzer <david.oberhollenzer@...ma-star.at>
Cc: netdev@...r.kernel.org, andrew@...n.ch, Julian.FRIEDRICH@...quentis.com,
 f.fainelli@...il.com, olteanv@...il.com, davem@...emloft.net,
 edumazet@...gle.com, kuba@...nel.org, pabeni@...hat.com,
 linux-kernel@...r.kernel.org, upstream+netdev@...ma-star.at
Subject: Re: [PATCH v4] net: dsa: mv88e6xxx: propperly shutdown PPU re-enable
 timer on destroy

Hello:

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

On Tue,  1 Apr 2025 15:56:37 +0200 you wrote:
> The mv88e6xxx has an internal PPU that polls PHY state. If we want to
> access the internal PHYs, we need to disable the PPU first. Because
> that is a slow operation, a 10ms timer is used to re-enable it,
> canceled with every access, so bulk operations effectively only
> disable it once and re-enable it some 10ms after the last access.
> 
> If a PHY is accessed and then the mv88e6xxx module is removed before
> the 10ms are up, the PPU re-enable ends up accessing a dangling pointer.
> 
> [...]

Here is the summary with links:
  - [v4] net: dsa: mv88e6xxx: propperly shutdown PPU re-enable timer on destroy
    https://git.kernel.org/netdev/net/c/a58d882841a0

You are awesome, thank you!
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