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Message-ID: <20150213161439.GS21387@intel.com>
Date:	Fri, 13 Feb 2015 21:44:39 +0530
From:	Vinod Koul <vinod.koul@...el.com>
To:	Robert Baldyga <r.baldyga@...sung.com>
Cc:	dan.j.williams@...el.com, lars@...afoo.de,
	dmaengine@...r.kernel.org, linux-kernel@...r.kernel.org,
	m.szyprowski@...sung.com, k.kozlowski@...sung.com
Subject: Re: [PATCH v4 0/2] dma: pl330: improve status checking

On Wed, Feb 11, 2015 at 01:23:16PM +0100, Robert Baldyga wrote:
> Hello,
> 
> This series allows to check DMA transfer residue (number of bytes left
> to send/receive) by modifying pl330_tx_status() function, when struct
> dma_tx_state is filled with needed data. It also introduces DMA_PAUSE
> feature, which allows to halt DMA transfer before termination and read
> residue without risk of data loss.
> 
> This features are needed for proper implementation of DMA transfers,
> particulary for serial drivers when transfer sizes are unknown and
> requests on DMA channels are terminated before transfer completion
> very ofter (it's becouse we terminate then in timeout interrupt to
> avoid latency which is usually undesirable).
Applied, thanks

-- 
~Vinod

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