linux-kernel - RE: [PATCH 3/3] dma: Add Freescale eDMA engine driver support

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Date:	Tue, 17 Sep 2013 08:08:46 +0000
From:	Lu Jingchang-B35083 <B35083@...escale.com>
To:	Vinod Koul <vinod.koul@...el.com>
CC:	"djbw@...com" <djbw@...com>,
	"shawn.guo@...aro.org" <shawn.guo@...aro.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>
Subject: RE: [PATCH 3/3] dma: Add Freescale eDMA engine driver support

> -----Original Message-----
> From: Vinod Koul [mailto:vinod.koul@...el.com]
> Sent: Tuesday, September 17, 2013 12:54 PM
> To: Lu Jingchang-B35083
> Cc: djbw@...com; shawn.guo@...aro.org; linux-kernel@...r.kernel.org;
> linux-arm-kernel@...ts.infradead.org; devicetree@...r.kernel.org; Wang
> Huan-B18965
> Subject: Re: [PATCH 3/3] dma: Add Freescale eDMA engine driver support
> > +	case DMA_PAUSE:
> > +		if (fsl_chan->edesc)
> > +			fsl_edma_disable_request(fsl_chan);
> racy here too...
It only set the channel HW register, no list is handled, 
is lock needed here? Thanks!






Best Regards,
Jingchang