[alsa-devel] [PATCH V2 REPOST] ASoC: dmaengine: support deferred probe for DMA channels

[Stephen Warren]

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 at 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 at nvidia.com>
>> Acked-by: Lars-Peter Clausen <lars at 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.