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Date:	Tue, 24 May 2016 12:50:28 +0300
From:	Laurent Pinchart <>
To:	Vinod Koul <>
Cc:	Kuninori Morimoto <>,
	Geert Uytterhoeven <>,
	Laurent Pinchart <>,
	sakato <>,
	OSD2 ML <>,,
Subject: Re: [PATCH] dma: rcar-dmac: use list_add() on rcar_dmac_desc_put()

Hi Vinod,

On Saturday 14 May 2016 13:27:31 Vinod Koul wrote:
> On Fri, Apr 22, 2016 at 01:50:04AM +0000, Kuninori Morimoto wrote:
> > From: Kuninori Morimoto <>
> > 
> > Current rcar_dmac_desc_put() is using list_add_tail() in order to
> > push used descriptor to list of free descriptors, and next DMA transfer
> > try to reuse it from this list. But because it is using *_tail(),
> > this reuse effect can't be obtained without using all of them.
> > For a longer-term solution, we should allocate hardware descriptors
> > using GFP_KERNEL instead of GFP_NOWAIT, but it is difficult today.
> > This patch uses list_add() instead of list_add_tail() for short-term
> > solution.
> Applied, thanks

Thanks, but where did you apply it to ? I can't find it in your tree.


Laurent Pinchart

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