Hi,

I have question concerning ALSA Core snd_pcm_control_ioctl function.

I have noticed that the IOCTL fails if it's called for a device with substream_count = 0, since I'm implementing a PCM device that supports Record and does not support Playback, the IOCTL fails when called for the Playback stream. I would propose, in such case, to return that the stream has 0 playback substreams instead of failing.

Thanks in advance for your help,

Regards,

Selma.

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