Messages in this thread | | | From | "yitian" <> | Subject | RE: [PATCH 1/1] dmaengine: dw: resolve recursion lock when audio playback | Date | Mon, 28 Sep 2015 15:23:20 +0800 |
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> From: Andy Shevchenko [mailto:andy.shevchenko@gmail.com] > Sent: Monday, September 28, 2015 3:06 PM > To: Viresh Kumar <viresh.kumar@linaro.org> > Cc: yitian <yitian.bu@tangramtek.com>; Viresh Kumar > <vireshk@kernel.org>; Andy Shevchenko > <andriy.shevchenko@linux.intel.com>; Vinod Koul <vinod.koul@intel.com>; > Dan Williams <dan.j.williams@intel.com>; dmaengine > <dmaengine@vger.kernel.org>; Linux Kernel Mailing List > <linux-kernel@vger.kernel.org> > Subject: Re: [PATCH 1/1] dmaengine: dw: resolve recursion > > I am not sure if this is a sane way of doing that, and we were scanning > > the descriptors for some valid reason.. > > Actually one of the patches in a pile sitting in my private repo is > also including similar change. In my case the reason is to support > cyclic transfers natively. >
Yes, i am using DW DMAC to support cyclic transfer. Currently it is very easy to get recursion lock crash, but after this patch everything is fine on my device. I am waiting for your further guide. Thanks.
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