* Re: [PATCH V2] dmaengine: mdc: Correct terminate_all handling
[not found] <1449760043-6292-1-git-send-email-Damien.Horsley@imgtec.com>
@ 2015-12-18 5:45 ` Vinod Koul
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From: Vinod Koul @ 2015-12-18 5:45 UTC (permalink / raw)
To: Damien Horsley; +Cc: dmaengine, linux-kernel, Dan Williams, James Hartley
On Thu, Dec 10, 2015 at 03:07:23PM +0000, Damien Horsley wrote:
> From: "Damien.Horsley" <Damien.Horsley@imgtec.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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