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Date: Sat, 14 May 2016 13:27:31 +0530 From: Vinod Koul <vinod.koul@...el.com> To: Kuninori Morimoto <kuninori.morimoto.gx@...esas.com> Cc: Geert Uytterhoeven <geert+renesas@...der.be>, Laurent Pinchart <laurent.pinchart+renesas@...asonboard.com>, sakato <ryusuke.sakato.bx@...esas.com>, OSD2 ML <osd2@...renesas.com>, dmaengine@...r.kernel.org, linux-kernel@...r.kernel.org Subject: Re: [PATCH] dma: rcar-dmac: use list_add() on rcar_dmac_desc_put() On Fri, Apr 22, 2016 at 01:50:04AM +0000, Kuninori Morimoto wrote: > > From: Kuninori Morimoto <kuninori.morimoto.gx@...esas.com> > > 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 -- ~Vinod
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