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Date: Fri, 3 Aug 2018 16:48:14 +0800 From: Huang Shijie <sjhuang@...vatar.ai> To: Peter Ujfalusi <peter.ujfalusi@...com> Cc: vkoul@...nel.org, dmaengine@...r.kernel.org, linux-kernel@...r.kernel.org, dave.jiang@...el.com, radhey.shyam.pandey@...inx.com, appana.durga.rao@...inx.com, jmkrzyszt@...il.com, gomonovych@...il.com, keescook@...omium.org, horms+renesas@...ge.net.au, geert+renesas@...der.be, shawnguo@...nel.org, baoyou.xie@...aro.org, michal.simek@...inx.com, baohua@...nel.org, ludovic.desroches@...rochip.com, linus.walleij@...aro.org, david.brown@...aro.org Subject: Re: [PATCH 00/46] Use dmaenginem_async_device_register to simplify code On Fri, Aug 03, 2018 at 11:20:49AM +0300, Peter Ujfalusi wrote: > Hi, > > On 2018-08-03 10:19, Huang Shijie wrote: > > All the patches are using dmaenginem_async_device_register to simplify code > > except the last one: > > dmaengine: add COMPILE_TEST for the drivers > > > > I use the last one to do the compiler test. > > There are still 20 drivers which do not use the dmaenginem_async_device_register. > > Let me take a rest, if this patch set is accepted, I will do the rest. > > I think for most of the drivers this series is going to open a race > which is essentially: > > prior: > _remove() > { > ... > dma_async_device_register() > /* Free resources, disable HW, etc */ > return 0; > } > > after: > _remove() > { > ... > /* Free resources, disable HW, etc */ > /* > * The dma device is still registered and a channel can be > * requested > */ > > dma_async_device_register() > return 0; > } > > It might be theoretical, but conversion to managed device resources is > not straight forward in some cases. Yes. okay, let me think again.. @Vinod, please just ignore this patch set. Thanks Huang Shijie
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