linux-kernel - Re: [PATCH 1/2] dma: Add interface to calculate data transferred

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Message-ID: <20131016141247.GB17567@kroah.com>
Date:	Wed, 16 Oct 2013 07:12:47 -0700
From:	Greg KH <gregkh@...uxfoundation.org>
To:	"Shevchenko, Andriy" <andriy.shevchenko@...el.com>
Cc:	"Koul, Vinod" <vinod.koul@...el.com>,
	"Williams, Dan J" <dan.j.williams@...el.com>,
	Youquan Song <youquan.song@...ux.jf.intel.com>,
	"Song, Youquan" <youquan.song@...el.com>,
	"Westerberg, Mika" <mika.westerberg@...el.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 1/2] dma: Add interface to calculate data transferred

On Wed, Oct 16, 2013 at 09:13:20AM +0000, Shevchenko, Andriy wrote:
> On Wed, 2013-10-16 at 13:27 +0530, Vinod Koul wrote:
> > On Wed, Oct 16, 2013 at 02:06:30PM +0530, Shevchenko, Andriy wrote:
> > > On Wed, 2013-10-16 at 11:08 +0530, Vinod Koul wrote:
> 
> []
> 
> > > > Well am going to take it a bit further and ask you why do we need the
> > > > /sys/class/dma? I have never used it for slave work.
> > > 
> > > How user (who, f.e., would like to run dmatest) will know names of the
> > > channels provided?
> > Ok dmatest requires this, I overlooked that part
> > 
> > > How could we see what channels of certain dma controller are requested /
> > > busy from userspace?
> > But do end user care or need to know about this?
> 
> The idea is to have some test cases. So, end user probably doesn't
> really need this.

So could this just be debugfs files instead?
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