netdev - Re: [PATCH net] ice: Block switchdev mode when ADQ is active and vice versa

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Message-ID: <ZN3GegKGyZQSAxYA@vergenet.net>
Date: Thu, 17 Aug 2023 09:04:26 +0200
From: Simon Horman <horms@...nel.org>
To: Tony Nguyen <anthony.l.nguyen@...el.com>
Cc: davem@...emloft.net, kuba@...nel.org, pabeni@...hat.com,
	edumazet@...gle.com, netdev@...r.kernel.org,
	Marcin Szycik <marcin.szycik@...ux.intel.com>, leon@...nel.org,
	jiri@...nulli.us, Przemek Kitszel <przemyslaw.kitszel@...el.com>,
	Sujai Buvaneswaran <sujai.buvaneswaran@...el.com>
Subject: Re: [PATCH net] ice: Block switchdev mode when ADQ is active and
 vice versa

On Wed, Aug 16, 2023 at 12:34:05PM -0700, Tony Nguyen wrote:
> From: Marcin Szycik <marcin.szycik@...ux.intel.com>
> 
> ADQ and switchdev are not supported simultaneously. Enabling both at the
> same time can result in nullptr dereference.
> 
> To prevent this, check if ADQ is active when changing devlink mode to
> switchdev mode, and check if switchdev is active when enabling ADQ.
> 
> Fixes: fbc7b27af0f9 ("ice: enable ndo_setup_tc support for mqprio_qdisc")
> Signed-off-by: Marcin Szycik <marcin.szycik@...ux.intel.com>
> Reviewed-by: Przemek Kitszel <przemyslaw.kitszel@...el.com>
> Tested-by: Sujai Buvaneswaran <sujai.buvaneswaran@...el.com>
> Signed-off-by: Tony Nguyen <anthony.l.nguyen@...el.com>

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