linux-kernel - Re: [PATCH 06/14] mmc: mmci: merge prepare data functions

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Date:   Mon, 3 Sep 2018 14:15:39 +0200
From:   Ulf Hansson <ulf.hansson@...aro.org>
To:     Ludovic Barre <ludovic.Barre@...com>
Cc:     Rob Herring <robh+dt@...nel.org>,
        Maxime Coquelin <mcoquelin.stm32@...il.com>,
        Alexandre Torgue <alexandre.torgue@...com>,
        Gerald Baeza <gerald.baeza@...com>,
        Linux ARM <linux-arm-kernel@...ts.infradead.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        DTML <devicetree@...r.kernel.org>,
        "linux-mmc@...r.kernel.org" <linux-mmc@...r.kernel.org>
Subject: Re: [PATCH 06/14] mmc: mmci: merge prepare data functions

On 1 August 2018 at 11:36, Ludovic Barre <ludovic.Barre@...com> wrote:
> From: Ludovic Barre <ludovic.barre@...com>
>
> This patch merges the prepare data functions.
> This allows to define a single access to prepare data service.
> This prepares integration for mmci host ops.
>
> Signed-off-by: Ludovic Barre <ludovic.barre@...com>
> ---
>  drivers/mmc/host/mmci.c | 22 +++++++++-------------
>  1 file changed, 9 insertions(+), 13 deletions(-)
>
> diff --git a/drivers/mmc/host/mmci.c b/drivers/mmc/host/mmci.c
> index 5646c2e6..e4d80f1 100644
> --- a/drivers/mmc/host/mmci.c
> +++ b/drivers/mmc/host/mmci.c
> @@ -651,11 +651,16 @@ static int __mmci_dma_prep_data(struct mmci_host *host, struct mmc_data *data,
>         return -ENOMEM;
>  }
>
> -static inline int mmci_dma_prep_data(struct mmci_host *host,
> -                                    struct mmc_data *data)
> +static inline int mmci_dma_prepare_data(struct mmci_host *host,

Nitpick: I don't see the reason to why you need to rename this
function here, please keep it as is.

> +                                       struct mmc_data *data,
> +                                       bool next)
>  {
>         struct dmaengine_priv *dmae = host->dma_priv;
> +       struct dmaengine_next *nd = &dmae->next_data;
>
> +       if (next)
> +               return __mmci_dma_prep_data(host, data, &nd->dma_chan,
> +                                           &nd->dma_desc);
>         /* Check if next job is already prepared. */
>         if (dmae->dma_current && dmae->dma_desc_current)
>                 return 0;
> @@ -665,22 +670,13 @@ static inline int mmci_dma_prep_data(struct mmci_host *host,
>                                     &dmae->dma_desc_current);
>  }
>
> -static inline int mmci_dma_prep_next(struct mmci_host *host,
> -                                    struct mmc_data *data)
> -{
> -       struct dmaengine_priv *dmae = host->dma_priv;
> -       struct dmaengine_next *nd = &dmae->next_data;
> -
> -       return __mmci_dma_prep_data(host, data, &nd->dma_chan, &nd->dma_desc);
> -}
> -
>  static int mmci_dma_start_data(struct mmci_host *host, unsigned int datactrl)
>  {
>         struct dmaengine_priv *dmae = host->dma_priv;
>         struct mmc_data *data = host->data;
>         int ret;
>
> -       ret = mmci_dma_prep_data(host, host->data);
> +       ret = mmci_dma_prepare_data(host, host->data, false);
>         if (ret)
>                 return ret;
>
> @@ -737,7 +733,7 @@ static void mmci_pre_request(struct mmc_host *mmc, struct mmc_request *mrq)
>         if (mmci_validate_data(host, data))
>                 return;
>
> -       if (!mmci_dma_prep_next(host, data))
> +       if (!mmci_dma_prepare_data(host, data, true))
>                 data->host_cookie = ++host->next_cookie < 0 ?
>                         1 : host->next_cookie;
>  }
> --
> 2.7.4
>

Kind regards
Uffe