From: Lars-Peter Clausen <lars@metafoo.de>
To: Barry Song <21cnbao@gmail.com>,
peter.ujfalusi@ti.com, tiwai@suse.de, broonie@linaro.org
Cc: alsa-devel@alsa-project.org, workgroup.linux@csr.com,
Barry Song <Baohua.Song@csr.com>
Subject: Re: [PATCH] ALSA: pcm_dmaengine: correct the error handler of dmaengine_prep_dma_cyclic
Date: Thu, 25 Dec 2014 10:02:33 +0100 [thread overview]
Message-ID: <549BD2A9.505@metafoo.de> (raw)
In-Reply-To: <1419482475-4911-1-git-send-email-21cnbao@gmail.com>
On 12/25/2014 05:41 AM, Barry Song wrote:
> From: Barry Song <Baohua.Song@csr.com>
>
> preparing cyclic DMA description can fail either due to DMA desc list
> is full(-ENOMEM), or due to the coming DMA configuration is illegal or
> not supported by the acting DMA hardware(other ERR codes).
According to the API definition this returns either NULL or a valid
descriptor, so the behavior in pcm_dmaengine is correct. Maybe your
particular dmaengine driver as a incorrect implementation.
- Lars
next prev parent reply other threads:[~2014-12-25 9:02 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-12-25 4:41 [PATCH] ALSA: pcm_dmaengine: correct the error handler of dmaengine_prep_dma_cyclic Barry Song
2014-12-25 9:02 ` Lars-Peter Clausen [this message]
2014-12-25 9:08 ` Barry Song
2014-12-25 9:35 ` Barry Song
2014-12-25 9:45 ` Lars-Peter Clausen
2014-12-25 9:53 ` Barry Song
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