linux-kernel - Re: [PATCH 5/5] Add DMA engine driver for Freescale MPC85xx processors.

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Message-ID: <20070911142014.GG1932@ld0162-tx32.am.freescale.net>
Date:	Tue, 11 Sep 2007 09:20:14 -0500
From:	Scott Wood <scottwood@...escale.com>
To:	Zhang Wei-r63237 <Wei.Zhang@...escale.com>
Cc:	"Nelson, Shannon" <shannon.nelson@...el.com>, paulus@...ba.org,
	linuxppc-dev@...abs.org, dan.j.williams@...el.com,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 5/5] Add DMA engine driver for Freescale MPC85xx processors.

On Tue, Sep 11, 2007 at 06:10:53PM +0800, Zhang Wei-r63237 wrote:
> > >+
> > >+	fsl_dma_memcpy_issue_pending(chan);
> > >+	while (fsl_dma_is_complete(chan, cookie, NULL, NULL)
> > >+			!= DMA_SUCCESS);
> > 
> > Again, is it possible to hang your thread here?
> > 
> > [...]
> 
> I'll add msleep here.

I think what was being sought was a timout, causing the test to return
failure.

-Scott
-
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