linux-kernel - Re: [PATCH V7 1/2] i2c: i2c-qcom-geni: Store DMA mapping data in geni_i2c

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Message-ID: <f8b61682-e50b-7cf2-1ab6-9ad3db9e9625@codeaurora.org>
Date:   Wed, 30 Dec 2020 14:54:45 +0530
From:   Akash Asthana <akashast@...eaurora.org>
To:     Roja Rani Yarubandi <rojay@...eaurora.org>, wsa@...nel.org
Cc:     swboyd@...omium.org, dianders@...omium.org,
        saiprakash.ranjan@...eaurora.org, gregkh@...uxfoundation.org,
        mka@...omium.org, msavaliy@....qualcomm.com, skakit@...eaurora.org,
        pyarlaga@...eaurora.org, rnayak@...eaurora.org, agross@...nel.org,
        bjorn.andersson@...aro.org, linux-arm-msm@...r.kernel.org,
        linux-i2c@...r.kernel.org, linux-kernel@...r.kernel.org,
        sumit.semwal@...aro.org, linux-media@...r.kernel.org
Subject: Re: [PATCH V7 1/2] i2c: i2c-qcom-geni: Store DMA mapping data in
 geni_i2c_dev struct


On 12/21/2020 6:08 PM, Roja Rani Yarubandi wrote:
> Store DMA mapping data in geni_i2c_dev struct to enhance DMA mapping
> data scope. For example during shutdown callback to unmap DMA mapping,
> this stored DMA mapping data can be used to call geni_se_tx_dma_unprep
> and geni_se_rx_dma_unprep functions.
>
> Add two helper functions geni_i2c_rx_msg_cleanup and
> geni_i2c_tx_msg_cleanup to unwrap the things after rx/tx FIFO/DMA
> transfers, so that the same can be used in geni_i2c_stop_xfer()
> function during shutdown callback.
>
> Signed-off-by: Roja Rani Yarubandi <rojay@...eaurora.org>
Reviewed-by: Akash Asthana <akashast@...eaurora.org>

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