From mboxrd@z Thu Jan  1 00:00:00 1970
From: Stephen Warren <swarren@wwwdotorg.org>
Subject: Re: [PATCH V2 REPOST] ASoC: dmaengine: support
 deferred probe for DMA channels
Date: Tue, 10 Dec 2013 11:11:16 -0700
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To: Lars-Peter Clausen <lars@metafoo.de>
Cc: alsa-devel@alsa-project.org, Mark Brown <broonie@kernel.org>, Stephen Warren <swarren@nvidia.com>, Liam Girdwood <lgirdwood@gmail.com>
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On 12/10/2013 11:06 AM, Lars-Peter Clausen wrote:
> On 12/10/2013 06:59 PM, Stephen Warren wrote:
>> From: Stephen Warren <swarren@nvidia.com>
>>
>> Enhance dmaengine_pcm_request_chan_of() to support deferred probe for
>> DMA channels, by using the new dma_request_slave_channel_or_err() API.
>> This prevents snd_dmaengine_pcm_register() from succeeding without
>> acquiring DMA channels due to the relevant DMA controller not yet being
>> registered.
>>
>> Signed-off-by: Stephen Warren <swarren@nvidia.com>
>> Acked-by: Lars-Peter Clausen <lars@metafoo.de>
> 
> Still looks good, but one nitpick:
> 
>> -		pcm->chan[i] = dma_request_slave_channel(dev, name);
>> +		chan = dma_request_slave_channel_reason(dev, name);
>> +		if (IS_ERR(chan)) {
>> +			if (PTR_ERR(pcm->chan[i]) == -EPROBE_DEFER)
>> +				return -EPROBE_DEFER;
>> +			pcm->chan[i] = NULL;
>> +		} else
>> +			pcm->chan[i] = chan;
> 
> I think checkpatch will complain about the above. There should be brackets
> around the else branch.

Hmm. It doesn't complain for some reason, but I'll fix that and repost.