linux-kernel - Re: [PATCH v5 12/12] can: m_can: Implement transmit submission coalescing

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Message-ID: <ZLlZudoYyarYmEjz@corigine.com>
Date:   Thu, 20 Jul 2023 16:58:49 +0100
From:   Simon Horman <simon.horman@...igine.com>
To:     Markus Schneider-Pargmann <msp@...libre.com>
Cc:     Marc Kleine-Budde <mkl@...gutronix.de>,
        Chandrasekar Ramakrishnan <rcsekar@...sung.com>,
        Wolfgang Grandegger <wg@...ndegger.com>,
        Vincent MAILHOL <mailhol.vincent@...adoo.fr>,
        "David S . Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>, linux-can@...r.kernel.org,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        Julien Panis <jpanis@...libre.com>
Subject: Re: [PATCH v5 12/12] can: m_can: Implement transmit submission
 coalescing

On Tue, Jul 18, 2023 at 09:57:08AM +0200, Markus Schneider-Pargmann wrote:
> m_can supports submitting multiple transmits with one register write.
> This is an interesting option to reduce the number of SPI transfers for
> peripheral chips.
> 
> The m_can_tx_op is extended with a bool that signals if it is the last
> transmission and the submit should be executed immediately.
> 
> The worker then writes the skb to the FIFO and submits it only if the
> submit bool is set. If it isn't set, the worker will write the next skb
> which is waiting in the workqueue to the FIFO, etc.
> 
> Signed-off-by: Markus Schneider-Pargmann <msp@...libre.com>

Reviewed-by: Simon Horman <simon.horman@...igine.com>