From: "yitian" <yitian.bu@tangramtek.com>
To: "'Andy Shevchenko'" <andy.shevchenko@gmail.com>,
"'Viresh Kumar'" <viresh.kumar@linaro.org>
Cc: "'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 lock when audio playback
Date: Mon, 28 Sep 2015 15:23:20 +0800 [thread overview]
Message-ID: <035501d0f9be$8ef49340$acddb9c0$@tangramtek.com> (raw)
In-Reply-To: <CAHp75VdU6ej_+mRdd2GnpZf+fOJ3Ub0isefoYcZuzNXA9p+bLg@mail.gmail.com>
> 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.
next prev parent reply other threads:[~2015-09-28 7:30 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-09-26 12:38 [PATCH 1/1] dmaengine: dw: resolve recursion lock when audio playback yitian
2015-09-28 3:23 ` Viresh Kumar
2015-09-28 7:05 ` Andy Shevchenko
2015-09-28 7:23 ` yitian [this message]
2015-09-28 8:46 ` Andy Shevchenko
2015-09-28 9:14 ` yitian
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