linux-kernel - Re: [PATCH net v3 2/2] net: ethernet: ti: am65-cpsw: avoid devm_alloc

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Message-ID: <ebd0bc6c-355e-4bd6-8eaa-b4ec0e5212f1@kernel.org>
Date: Mon, 7 Oct 2024 14:37:37 +0300
From: Roger Quadros <rogerq@...nel.org>
To: Nicolas Pitre <nico@...xnic.net>, "David S. Miller"
 <davem@...emloft.net>, Eric Dumazet <edumazet@...gle.com>,
 Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>,
 Grygorii Strashko <grygorii.strashko@...com>,
 Vignesh Raghavendra <vigneshr@...com>
Cc: Nicolas Pitre <npitre@...libre.com>, netdev@...r.kernel.org,
 linux-kernel@...r.kernel.org
Subject: Re: [PATCH net v3 2/2] net: ethernet: ti: am65-cpsw: avoid
 devm_alloc_etherdev, fix module removal

On 04/10/2024 07:10, Nicolas Pitre wrote:
> From: Nicolas Pitre <npitre@...libre.com>
> 
> Usage of devm_alloc_etherdev_mqs() conflicts with
> am65_cpsw_nuss_cleanup_ndev() as the same struct net_device instances
> get unregistered twice. Switch to alloc_etherdev_mqs() and make sure
> am65_cpsw_nuss_cleanup_ndev() unregisters and frees those net_device
> instances properly.
> 
> With this, it is finally possible to rmmod the driver without oopsing
> the kernel.
> 
> Fixes: 93a76530316a ("net: ethernet: ti: introduce am65x/j721e gigabit eth subsystem driver")
> Signed-off-by: Nicolas Pitre <npitre@...libre.com>

Reviewed-by: Roger Quadros <roger@...nel.org>