linux-kernel - Re: [PATCH 07/12] i2c: qup: use the complete transfer length to choose DMA mode

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Message-ID: <20180227225952.GH20901@hector.attlocal.net>
Date:   Tue, 27 Feb 2018 16:59:52 -0600
From:   Andy Gross <andy.gross@...aro.org>
To:     Abhishek Sahu <absahu@...eaurora.org>
Cc:     Wolfram Sang <wsa@...-dreams.de>,
        David Brown <david.brown@...aro.org>,
        Sricharan R <sricharan@...eaurora.org>,
        linux-arm-msm@...r.kernel.org, linux-soc@...r.kernel.org,
        linux-i2c@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 07/12] i2c: qup: use the complete transfer length to
 choose DMA mode

On Sat, Feb 03, 2018 at 01:28:12PM +0530, Abhishek Sahu wrote:
> Currently each message length in complete transfer is being
> checked for determining DMA mode and if any of the message length
> is less than FIFO length then non DMA mode is being used which
> will increase overhead. DMA can be used for any length and it
> should be determined with complete transfer length. Now, this
> patch introduces DMA threshold length and the transfer will be
> done in DMA mode if the total length is greater than this
> threshold length.
> 
> Signed-off-by: Abhishek Sahu <absahu@...eaurora.org>
> ---

I agree with Sricharan's nit.

Reviewed-by: Andy Gross <andy.gross@...aro.org>