linux-kernel - Re: [PATCH 2/2] mmc: uniphier-sd: avoid using broken DMA RX channel

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Date:   Mon, 15 Oct 2018 15:15:47 +0200
From:   Ulf Hansson <ulf.hansson@...aro.org>
To:     Masahiro Yamada <yamada.masahiro@...ionext.com>
Cc:     "linux-mmc@...r.kernel.org" <linux-mmc@...r.kernel.org>,
        Wolfram Sang <wsa+renesas@...g-engineering.com>,
        Linux ARM <linux-arm-kernel@...ts.infradead.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 2/2] mmc: uniphier-sd: avoid using broken DMA RX channel

On 12 October 2018 at 16:57, Masahiro Yamada
<yamada.masahiro@...ionext.com> wrote:
> host->chan_rx is NULL when UNIPHIER_SD_CAP_BROKEN_DMA_RX quirk flag
> is set. In this case, it should not set up DMA.
>
> Signed-off-by: Masahiro Yamada <yamada.masahiro@...ionext.com>

Applied for next, thanks!

Kind regards
Uffe


> ---
>
>  drivers/mmc/host/uniphier-sd.c | 3 +++
>  1 file changed, 3 insertions(+)
>
> diff --git a/drivers/mmc/host/uniphier-sd.c b/drivers/mmc/host/uniphier-sd.c
> index 10d49aa..1ee9fd0 100644
> --- a/drivers/mmc/host/uniphier-sd.c
> +++ b/drivers/mmc/host/uniphier-sd.c
> @@ -251,6 +251,9 @@ static void uniphier_sd_internal_dma_start(struct tmio_mmc_host *host,
>         u32 dma_mode;
>         int sg_len;
>
> +       if ((data->flags & MMC_DATA_READ) && !host->chan_rx)
> +               goto force_pio;
> +
>         if (WARN_ON(host->sg_len != 1))
>                 goto force_pio;
>
> --
> 2.7.4
>