linux-kernel - Re: [PATCH iwl-next] iavf: Remove queue tracking fields from iavf_adminq

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Date:   Fri, 3 Nov 2023 17:09:28 +0000
From:   Simon Horman <horms@...nel.org>
To:     Ivan Vecera <ivecera@...hat.com>
Cc:     netdev@...r.kernel.org,
        Jesse Brandeburg <jesse.brandeburg@...el.com>,
        Tony Nguyen <anthony.l.nguyen@...el.com>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        intel-wired-lan@...ts.osuosl.org, linux-kernel@...r.kernel.org,
        Jacob Keller <jacob.e.keller@...el.com>,
        Wojciech Drewek <wojciech.drewek@...el.com>
Subject: Re: [PATCH iwl-next] iavf: Remove queue tracking fields from
 iavf_adminq_ring

On Thu, Oct 26, 2023 at 10:39:32AM +0200, Ivan Vecera wrote:
> Fields 'head', 'tail', 'len', 'bah' and 'bal' in iavf_adminq_ring
> are used to store register offsets. These offsets are initialized
> and remains constant so there is no need to store them in the
> iavf_adminq_ring structure.
> 
> Remove these fields from iavf_adminq_ring and use register offset
> constants instead. Remove iavf_adminq_init_regs() that originally
> stores these constants into these fields.
> 
> Finally improve iavf_check_asq_alive() that assumes that
> non-zero value of hw->aq.asq.len indicates fully initialized
> AdminQ send queue. Replace it by check for non-zero value
> of field hw->aq.asq.count that is non-zero when the sending
> queue is initialized and is zeroed during shutdown of
> the queue.
> 
> Signed-off-by: Ivan Vecera <ivecera@...hat.com>

Thanks, this is a nice cleanup.

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

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