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

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Message-ID: <20230721133603.eahybmvzf4yalyn7@blmsp>
Date:   Fri, 21 Jul 2023 15:37:00 +0200
From:   Markus Schneider-Pargmann <msp@...libre.com>
To:     Simon Horman <simon.horman@...igine.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

Hi Simon,

On Thu, Jul 20, 2023 at 04:58:49PM +0100, Simon Horman wrote:
> 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>

Thank you for your reviews!

Best,
Markus