linux-kernel - Re: [PATCH] ep93xx: Implement double buffering for M2M DMA channels

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Message-ID: <20120323070039.GB5812@mwesterb-mobl.ger.corp.intel.com>
Date:	Fri, 23 Mar 2012 09:00:39 +0200
From:	Mika Westerberg <mika.westerberg@....fi>
To:	H Hartley Sweeten <hartleys@...ionengravers.com>
Cc:	Rafal Prylowski <prylowski@...asoft.pl>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"vinod.koul@...el.com" <vinod.koul@...el.com>,
	"rmallon@...il.com" <rmallon@...il.com>
Subject: Re: [PATCH] ep93xx: Implement double buffering for M2M DMA channels

On Thu, Mar 22, 2012 at 06:56:30PM -0500, H Hartley Sweeten wrote:

> I wonder if the spurious interrupts were the real problem behind what
> was causing the Oops that prompted your patch:
> 
> dma/ep93xx_dma: prevent ep93xx_dma_tasklet() to reference an empty list

No, it was a different problem spotted by Rafal. It was related to calling
dma_terminate_all() in a interrupt context or something like that.
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