At Wed, 02 Jul 2014 16:10:09 +0200,
Lars-Peter Clausen wrote:
>
> On 07/02/2014 03:47 PM, Takashi Iwai wrote:
> [...]
> >> + /*
> >> + * Prepare formats mask for valid/allowed sample types. If the dma does
> >> + * not have support for the given physical word size, it needs to be
> >> + * masked out so user space can not use the format which produces
> >> + * corrupted audio.
> >> + * In case the dma driver does not implement the slave_caps the default
> >> + * assumption is that it supports 1, 2 and 4 bytes widths.
> >> + */
> >> + for (i = 0; i <= SNDRV_PCM_FORMAT_LAST; i++) {
> >> + int bits = snd_pcm_format_physical_width(i);
> >
> > Better to add a negative value check. Some formats return -EINVAL.
> >
>
> So what should we do with those formats? Not support them?
Yes, these are special formats that can't be handled generically.
Takashi
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