linux-kernel - Re: [PATCH 15/16] dmaengine: add transfered member to dma_async_tx

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Date:	Mon, 29 Jul 2013 14:33:12 +0200
From:	Sebastian Andrzej Siewior <bigeasy@...utronix.de>
To:	Vinod Koul <vinod.koul@...el.com>
CC:	linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org,
	balbi@...com, george.cherian@...com, Dan Williams <djbw@...com>
Subject: Re: [PATCH 15/16] dmaengine: add transfered member to dma_async_tx_descriptor

On 07/29/2013 01:39 PM, Vinod Koul wrote:
>> @@ -416,6 +418,7 @@ struct dma_async_tx_descriptor {
>>  	dma_cookie_t (*tx_submit)(struct dma_async_tx_descriptor *tx);
>>  	dma_async_tx_callback callback;
>>  	void *callback_param;
>> +	unsigned int transfered;
> I think this should be doable with residue as well. You can return DMA_SUCCESS
> for status and fill in what is NOT transfered indicating that txn completed but
> lesser number of bytes are valid

Yes, will do.

> 
> ~Vinod
> 
Sebastian
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