linux-kernel - Re: [PATCH 1/5] spi-topcliff-pch: add tx-memory clear after complete transmitting

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Message-ID: <4E8ACEAE.3040400@dsn.lapis-semi.com>
Date:	Tue, 04 Oct 2011 18:15:26 +0900
From:	Tomoya MORINAGA <tomoya-linux@....lapis-semi.com>
To:	Grant Likely <grant.likely@...retlab.ca>
CC:	spi-devel-general@...ts.sourceforge.net,
	linux-kernel@...r.kernel.org, qi.wang@...el.com,
	yong.y.wang@...el.com, joel.clark@...el.com,
	kok.howg.ewe@...el.com, toshiharu-linux@....okisemi.com
Subject: Re: [PATCH 1/5] spi-topcliff-pch: add tx-memory clear after complete
 transmitting

Hi Grant,

1 month has passed. You look very busy, right ?
We've been long waiting for your accept.
Could you review these patch series ?

Thanks in advance.

(2011/09/06 16:58), Tomoya MORINAGA wrote:
> Currently, in case of reading date from SPI flash,
> command is sent twice.
> The cause is that tx-memory clear processing is missing .
> This patch adds the tx-momory clear processing.
> 
> Signed-off-by: Tomoya MORINAGA<tomoya-linux@....okisemi.com>
> ---
>   drivers/spi/spi-topcliff-pch.c |    5 +++++
>   1 files changed, 5 insertions(+), 0 deletions(-)
> 
> diff --git a/drivers/spi/spi-topcliff-pch.c b/drivers/spi/spi-topcliff-pch.c
> index 540c290..1b98b7e 100644
> --- a/drivers/spi/spi-topcliff-pch.c
> +++ b/drivers/spi/spi-topcliff-pch.c
> @@ -839,6 +839,11 @@ static void pch_spi_start_transfer(struct pch_spi_data *data)
> 
>   	dma_sync_sg_for_cpu(&data->master->dev, dma->sg_rx_p, dma->nent,
>   			    DMA_FROM_DEVICE);
> +
> +	dma_sync_sg_for_cpu(&data->master->dev, dma->sg_tx_p, dma->nent,
> +			    DMA_FROM_DEVICE);
> +	memset(data->dma.tx_buf_virt, 0, PAGE_SIZE);
> +
>   	async_tx_ack(dma->desc_rx);
>   	async_tx_ack(dma->desc_tx);
>   	kfree(dma->sg_tx_p);


-- 
tomoya
ROHM Co., Ltd.
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