- fs = snd_enter_user();
- switch (substream->stream) {
- case SNDRV_PCM_STREAM_PLAYBACK:
- result = snd_pcm_playback_ioctl1(NULL, substream, cmd,
- (void __user *)arg);
- break;
- case SNDRV_PCM_STREAM_CAPTURE:
- result = snd_pcm_capture_ioctl1(NULL, substream, cmd,
- (void __user *)arg);
- break;
+ switch (cmd) {
+ case SNDRV_PCM_IOCTL_FORWARD:
+ {
+ /* provided only for OSS; capture-only and no value returned */
+ if (substream->stream != SNDRV_PCM_STREAM_CAPTURE)
+ return -EINVAL;
+ result = snd_pcm_capture_forward(substream, *frames);
+ return result < 0 ? result : 0;
+ }
+ case SNDRV_PCM_IOCTL_HW_PARAMS:
+ return snd_pcm_hw_params(substream, arg);
+ case SNDRV_PCM_IOCTL_SW_PARAMS:
+ return snd_pcm_sw_params(substream, arg);
+ case SNDRV_PCM_IOCTL_PREPARE:
+ return snd_pcm_prepare(substream, NULL);
+ case SNDRV_PCM_IOCTL_START:
+ return snd_pcm_start_lock_irq(substream);
+ case SNDRV_PCM_IOCTL_DRAIN:
+ return snd_pcm_drain(substream, NULL);
+ case SNDRV_PCM_IOCTL_DROP:
+ return snd_pcm_drop(substream);
+ case SNDRV_PCM_IOCTL_DELAY:
+ {
+ result = snd_pcm_delay(substream);
+ if (result < 0)
+ return result;
+ *frames = result;
+ return 0;
+ }