linux-kernel - Re: [PATCH V2] dmaengine: mdc: Correct terminate

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Date:	Fri, 18 Dec 2015 11:15:20 +0530
From:	Vinod Koul <vinod.koul@...el.com>
To:	Damien Horsley <Damien.Horsley@...tec.com>
Cc:	dmaengine@...r.kernel.org, linux-kernel@...r.kernel.org,
	Dan Williams <dan.j.williams@...el.com>,
	James Hartley <james.hartley@...tec.com>
Subject: Re: [PATCH V2] dmaengine: mdc: Correct terminate_all handling

On Thu, Dec 10, 2015 at 03:07:23PM +0000, Damien Horsley wrote:
> From: "Damien.Horsley" <Damien.Horsley@...tec.com>
> 
> Use of the CANCEL bit in mdc_terminate_all creates an
> additional 'command done' to appear in the registers (in
> addition to an interrupt).
> 
> In addition, there is a potential race between
> mdc_terminate_all and the irq handler if a transfer
> completes at the same time as the terminate all (presently
> this results in an inappropriate warning).
> 
> To handle these issues, any outstanding 'command done'
> events are cleared during mdc_terminate_all and the irq
> handler takes no action when there are no new 'command done'
> events.

Applied, thanks

-- 
~Vinod
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