Subject: Re: [PATCH net] lan966x: Fix unloading/loading of the driver

From: [email-masked]
Date: Tue, 23 May 2023 13:40:19 +0000

Hello:

This patch was applied to netdev/net.git (main)
by Paolo Abeni <[email-masked]>:

On Mon, 22 May 2023 14:00:38 +0200 you wrote:
> It was noticing that after a while when unloading/loading the driver and
> sending traffic through the switch, it would stop working. It would stop
> forwarding any traffic and the only way to get out of this was to do a
> power cycle of the board. The root cause seems to be that the switch
> core is initialized twice. Apparently initializing twice the switch core
> disturbs the pointers in the queue systems in the HW, so after a while
> it would stop sending the traffic.
> Unfortunetly, it is not possible to use a reset of the switch here,
> because the reset line is connected to multiple devices like MDIO,
> SGPIO, FAN, etc. So then all the devices will get reseted when the
> network driver will be loaded.
> So the fix is to check if the core is initialized already and if that is
> the case don't initialize it again.
> 
> [...]

Here is the summary with links:
  - [net] lan966x: Fix unloading/loading of the driver
    https://git.kernel.org/netdev/net/c/600761245952

You are awesome, thank you!
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