linux-kernel - Re: [PATCH 1/2] spi: omap2: disable DMA requests before complete()

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Date:	Sat, 15 Dec 2012 00:35:39 +0000
From:	Grant Likely <grant.likely@...retlab.ca>
To:	Felipe Balbi <balbi@...com>,
	spi-devel-general@...ts.sourceforge.net, rob@...dley.net,
	rob.herring@...xeda.com
Cc:	devicetree-discuss@...ts.ozlabs.org,
	Linux OMAP Mailing List <linux-omap@...r.kernel.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Tony Lindgren <tony@...mide.com>, Felipe Balbi <balbi@...com>
Subject: Re: [PATCH 1/2] spi: omap2: disable DMA requests before complete()

On Wed, 12 Dec 2012 10:45:59 +0200, Felipe Balbi <balbi@...com> wrote:
> No actual errors have been found for completing
> before disabling DMA request lines, but it just
> looks more semantically correct that on our DMA
> callback we quiesce the whole thing before stating
> transfer is finished.
> 
> Signed-off-by: Felipe Balbi <balbi@...com>

Applied, thanks.

g.

> ---
>  drivers/spi/spi-omap2-mcspi.c | 8 ++++----
>  1 file changed, 4 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/spi/spi-omap2-mcspi.c b/drivers/spi/spi-omap2-mcspi.c
> index b610f52..68446db 100644
> --- a/drivers/spi/spi-omap2-mcspi.c
> +++ b/drivers/spi/spi-omap2-mcspi.c
> @@ -298,10 +298,10 @@ static void omap2_mcspi_rx_callback(void *data)
>  	struct omap2_mcspi *mcspi = spi_master_get_devdata(spi->master);
>  	struct omap2_mcspi_dma *mcspi_dma = &mcspi->dma_channels[spi->chip_select];
>  
> -	complete(&mcspi_dma->dma_rx_completion);
> -
>  	/* We must disable the DMA RX request */
>  	omap2_mcspi_set_dma_req(spi, 1, 0);
> +
> +	complete(&mcspi_dma->dma_rx_completion);
>  }
>  
>  static void omap2_mcspi_tx_callback(void *data)
> @@ -310,10 +310,10 @@ static void omap2_mcspi_tx_callback(void *data)
>  	struct omap2_mcspi *mcspi = spi_master_get_devdata(spi->master);
>  	struct omap2_mcspi_dma *mcspi_dma = &mcspi->dma_channels[spi->chip_select];
>  
> -	complete(&mcspi_dma->dma_tx_completion);
> -
>  	/* We must disable the DMA TX request */
>  	omap2_mcspi_set_dma_req(spi, 0, 0);
> +
> +	complete(&mcspi_dma->dma_tx_completion);
>  }
>  
>  static void omap2_mcspi_tx_dma(struct spi_device *spi,
> -- 
> 1.8.1.rc1.5.g7e0651a
> 

-- 
Grant Likely, B.Sc, P.Eng.
Secret Lab Technologies, Ltd.
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