linux-kernel - Re: [PATCH] mmc: pxamci: fix enum type confusion

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Message-ID: <CAPDyKFq00AV6bhR0M-ZA5D0tO5S-cTx2bK=0w4DEGttb8khcOw@mail.gmail.com>
Date:   Mon, 18 Mar 2019 11:51:26 +0100
From:   Ulf Hansson <ulf.hansson@...aro.org>
To:     Arnd Bergmann <arnd@...db.de>
Cc:     Robert Jarzmik <robert.jarzmik@...e.fr>,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        Daniel Mack <daniel@...que.org>,
        Linus Walleij <linus.walleij@...aro.org>,
        "linux-mmc@...r.kernel.org" <linux-mmc@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] mmc: pxamci: fix enum type confusion

On Thu, 7 Mar 2019 at 11:09, Arnd Bergmann <arnd@...db.de> wrote:
>
> clang points out several instances of mismatched types in this drivers,
> all coming from a single declaration:
>
> drivers/mmc/host/pxamci.c:193:15: error: implicit conversion from enumeration type 'enum dma_transfer_direction' to
>       different enumeration type 'enum dma_data_direction' [-Werror,-Wenum-conversion]
>                 direction = DMA_DEV_TO_MEM;
>                           ~ ^~~~~~~~~~~~~~
> drivers/mmc/host/pxamci.c:212:62: error: implicit conversion from enumeration type 'enum dma_data_direction' to
>       different enumeration type 'enum dma_transfer_direction' [-Werror,-Wenum-conversion]
>         tx = dmaengine_prep_slave_sg(chan, data->sg, host->dma_len, direction,
>
> The behavior is correct, so this must be a simply typo from
> dma_data_direction and dma_transfer_direction being similarly named
> types with a similar purpose.
>
> Fixes: 6464b7140951 ("mmc: pxamci: switch over to dmaengine use")
> Signed-off-by: Arnd Bergmann <arnd@...db.de>

Applied for fixes and by adding a stable tag, thanks!

Kind regards
Uffe


> ---
>  drivers/mmc/host/pxamci.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/mmc/host/pxamci.c b/drivers/mmc/host/pxamci.c
> index c907bf502a12..c1d3f0e38921 100644
> --- a/drivers/mmc/host/pxamci.c
> +++ b/drivers/mmc/host/pxamci.c
> @@ -162,7 +162,7 @@ static void pxamci_dma_irq(void *param);
>  static void pxamci_setup_data(struct pxamci_host *host, struct mmc_data *data)
>  {
>         struct dma_async_tx_descriptor *tx;
> -       enum dma_data_direction direction;
> +       enum dma_transfer_direction direction;
>         struct dma_slave_config config;
>         struct dma_chan *chan;
>         unsigned int nob = data->blocks;
> --
> 2.20.0
>