netdev - Re: [PATCH net] net: airoha: Move net_devs registration in a dedicated routine

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Message-ID: <aUAXJ01iHnSJtItt@horms.kernel.org>
Date: Mon, 15 Dec 2025 14:11:51 +0000
From: Simon Horman <horms@...nel.org>
To: Lorenzo Bianconi <lorenzo@...nel.org>
Cc: Andrew Lunn <andrew+netdev@...n.ch>,
	"David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>,
	linux-arm-kernel@...ts.infradead.org,
	linux-mediatek@...ts.infradead.org, netdev@...r.kernel.org
Subject: Re: [PATCH net] net: airoha: Move net_devs registration in a
 dedicated routine

On Sun, Dec 14, 2025 at 10:30:07AM +0100, Lorenzo Bianconi wrote:
> Since airoha_probe() is not executed under rtnl lock, there is small race
> where a given device is configured by user-space while the remaining ones
> are not completely loaded from the dts yet. This condition will allow a
> hw device misconfiguration since there are some conditions (e.g. GDM2 check
> in airoha_dev_init()) that require all device are properly loaded from the
> device tree. Fix the issue moving net_devices registration at the end of
> the airoha_probe routine.
> 
> Fixes: 9cd451d414f6e ("net: airoha: Add loopback support for GDM2")
> Signed-off-by: Lorenzo Bianconi <lorenzo@...nel.org>

Hi Lorenzo,

As a fix this patch looks good to me.

Reviewed-by: Simon Horman <horms@...nel.org>

But I am somewhat surprised that the netdev isn't unregistered earlier
both in airoha_remove() and the unwind ladder of airoha_probe().