linux-kernel - Re: spi: spi-davinci: Fix direction in dma_map

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Message-ID: <51704F2C.6060901@ti.com>
Date:	Thu, 18 Apr 2013 15:53:16 -0400
From:	Matt Porter <mporter@...com>
To:	Christian Eggers <ceggers@....de>
CC:	<linux-kernel@...r.kernel.org>,
	<spi-devel-general@...ts.sourceforge.net>
Subject: Re: spi: spi-davinci: Fix direction in dma_map_single()

On 04/18/2013 03:31 PM, Christian Eggers wrote:
> Commit 048177ce3b3962852fd34a7e04938959271c7e70 (spi: spi-davinci:
>
> convert to DMA engine API) introduced a regression: dma_map_single()
>
> is called with direction DMA_FROM_DEVICE for rx and for tx.
>
> Signed-off-by: Christian Eggers <ceggers@....de>
>
> Cc: stable@...r.kernel.org

Cc: stable@...r.kernel.org # v3.7.x+
will get this applied to the correct stable kernels.

I'm wearing the brown bag for this one so other than fixing the Cc: it 
looks good.

Acked-by: Matt Porter <mporter@...com>

> --- drivers/spi/spi-davinci.c.orig 2013-04-18 20:54:02.728719412 +0200
>
> +++ drivers/spi/spi-davinci.c 2013-04-18 20:54:51.900623956 +0200
>
> @@ -608,7 +608,7 @@ static int davinci_spi_bufs(struct spi_d
>
> else
>
> buf = (void *)t->tx_buf;
>
> t->tx_dma = dma_map_single(&spi->dev, buf,
>
> - t->len, DMA_FROM_DEVICE);
>
> + t->len, DMA_TO_DEVICE);
>
> if (!t->tx_dma) {
>
> ret = -EFAULT;
>
> goto err_tx_map;
>

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