netdev - Re: [PATCH net 2/8] net/mlx5: Do not query MPIR on embedded CPU function

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Message-ID: <20240523094654.GE883722@kernel.org>
Date: Thu, 23 May 2024 10:46:54 +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>
Subject: Re: [PATCH net 2/8] net/mlx5: Do not query MPIR on embedded CPU
 function

On Wed, May 22, 2024 at 10:26:53PM +0300, Tariq Toukan wrote:
> A proper query to MPIR needs to set the correct value in the depth field.
> On embedded CPU this value is not necessarily zero. As there is no real
> use case for multi-PF netdev on the embedded CPU of the smart NIC, block
> this option.
> 
> This fixes the following failure:
> ACCESS_REG(0x805) op_mod(0x1) failed, status bad system state(0x4), syndrome (0x685f19), err(-5)
> 
> Fixes: 678eb448055a ("net/mlx5: SD, Implement basic query and instantiation")
> Signed-off-by: Tariq Toukan <tariqt@...dia.com>

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