netdev - Re: [PATCH net 1/8] net/mlx5: Lag, do bond only if slaves agree on roce state

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Date: Thu, 23 May 2024 10:45:36 +0100
From: Simon Horman <horms@...nel.org>
To: Tariq Toukan <tariqt@...dia.com>
Cc: "David S. Miller" <davem@...emloft.net>,
	Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>,
	Eric Dumazet <edumazet@...gle.com>, netdev@...r.kernel.org,
	Saeed Mahameed <saeedm@...dia.com>, Gal Pressman <gal@...dia.com>,
	Leon Romanovsky <leonro@...dia.com>,
	Maher Sanalla <msanalla@...dia.com>
Subject: Re: [PATCH net 1/8] net/mlx5: Lag, do bond only if slaves agree on
 roce state

On Wed, May 22, 2024 at 10:26:52PM +0300, Tariq Toukan wrote:
> From: Maher Sanalla <msanalla@...dia.com>
> 
> Currently, the driver does not enforce that lag bond slaves must have
> matching roce capabilities. Yet, in mlx5_do_bond(), the driver attempts
> to enable roce on all vports of the bond slaves, causing the following
> syndrome when one slave has no roce fw support:
> 
> mlx5_cmd_out_err:809:(pid 25427): MODIFY_NIC_VPORT_CONTEXT(0×755) op_mod(0×0)
> failed, status bad parameter(0×3), syndrome (0xc1f678), err(-22)
> 
> Thus, create HW lag only if bond's slaves agree on roce state,
> either all slaves have roce support resulting in a roce lag bond,
> or none do, resulting in a raw eth bond.
> 
> Fixes: 7907f23adc18 ("net/mlx5: Implement RoCE LAG feature")
> Signed-off-by: Maher Sanalla <msanalla@...dia.com>
> Signed-off-by: Tariq Toukan <tariqt@...dia.com>

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