[alsa-devel] [PATCH] ASoC don't clobber platform DMA driver ops

[r80115]

On 11/10/2011 5:43 AM, Mark Brown wrote:
> On Tue, Nov 01, 2011 at 04:05:16PM -0500, Alan Tull wrote:
>
> This looks mostly good, though as someone pointed out earlier it'd be
> nicer to split the ioctl() operation addition out into a separate patch.
> One issue, though.
>
>> @@ -1547,6 +1547,7 @@ static int soc_cleanup_card_resources(struct snd_soc_card *card)
>>
>>   	snd_soc_dapm_free(&card->dapm);
>>
>> +	kfree(card->rtd->ops);
>
> This is going to leak - rtd is an array per PCM, not a single value, so
> we need to free the ops for each element.  This is so we can have
> multiple DMA controllers in a single card.
>
> Actually what would be even easier would be to just embed the ops in the
> struct, we need to allocate one per runtime anyway and it makes for less
> allocation and cleanup code.
>

In soc-pcm.c we allocate:
soc_pcm_ops = kzalloc(sizeof(struct snd_pcm_ops), GFP_KERNEL);

and set it to the pointer

rtd->ops = soc_pcm_ops;

So that's what is freed there.

-- 
Regards,
Alan