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| author | Takashi Iwai <tiwai@suse.de> | 2019-11-17 09:53:03 +0100 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2019-11-20 19:39:54 +0100 |
| commit | fc033cbf6fb75452f03774ca5adccac8cf9bc84f (patch) | |
| tree | 9559f718dd7d43e613becd962bcc9d6d65c7885c /sound/core | |
| parent | ALSA: docs: Update for managed buffer allocation mode (diff) | |
| download | linux-fc033cbf6fb75452f03774ca5adccac8cf9bc84f.tar.xz linux-fc033cbf6fb75452f03774ca5adccac8cf9bc84f.zip | |
ALSA: pcm: Allow NULL ioctl ops
Currently PCM ioctl ops is a mandatory field but almost all drivers
simply pass snd_pcm_lib_ioctl. For simplicity, allow to set NULL in
the field and call snd_pcm_lib_ioctl() as default.
Link: https://lore.kernel.org/r/20191117085308.23915-4-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/core')
| -rw-r--r-- | sound/core/pcm_native.c | 19 |
1 files changed, 15 insertions, 4 deletions
diff --git a/sound/core/pcm_native.c b/sound/core/pcm_native.c index f1646735bde6..704ea75199e4 100644 --- a/sound/core/pcm_native.c +++ b/sound/core/pcm_native.c @@ -178,6 +178,16 @@ void snd_pcm_stream_unlock_irqrestore(struct snd_pcm_substream *substream, } EXPORT_SYMBOL_GPL(snd_pcm_stream_unlock_irqrestore); +/* Run PCM ioctl ops */ +static int snd_pcm_ops_ioctl(struct snd_pcm_substream *substream, + unsigned cmd, void *arg) +{ + if (substream->ops->ioctl) + return substream->ops->ioctl(substream, cmd, arg); + else + return snd_pcm_lib_ioctl(substream, cmd, arg); +} + int snd_pcm_info(struct snd_pcm_substream *substream, struct snd_pcm_info *info) { struct snd_pcm *pcm = substream->pcm; @@ -448,8 +458,9 @@ static int fixup_unreferenced_params(struct snd_pcm_substream *substream, m = hw_param_mask_c(params, SNDRV_PCM_HW_PARAM_FORMAT); i = hw_param_interval_c(params, SNDRV_PCM_HW_PARAM_CHANNELS); if (snd_mask_single(m) && snd_interval_single(i)) { - err = substream->ops->ioctl(substream, - SNDRV_PCM_IOCTL1_FIFO_SIZE, params); + err = snd_pcm_ops_ioctl(substream, + SNDRV_PCM_IOCTL1_FIFO_SIZE, + params); if (err < 0) return err; } @@ -971,7 +982,7 @@ static int snd_pcm_channel_info(struct snd_pcm_substream *substream, return -EINVAL; memset(info, 0, sizeof(*info)); info->channel = channel; - return substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_CHANNEL_INFO, info); + return snd_pcm_ops_ioctl(substream, SNDRV_PCM_IOCTL1_CHANNEL_INFO, info); } static int snd_pcm_channel_info_user(struct snd_pcm_substream *substream, @@ -1647,7 +1658,7 @@ static int snd_pcm_pre_reset(struct snd_pcm_substream *substream, int state) static int snd_pcm_do_reset(struct snd_pcm_substream *substream, int state) { struct snd_pcm_runtime *runtime = substream->runtime; - int err = substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_RESET, NULL); + int err = snd_pcm_ops_ioctl(substream, SNDRV_PCM_IOCTL1_RESET, NULL); if (err < 0) return err; runtime->hw_ptr_base = 0; |