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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>
This commit is contained in:
Takashi Iwai 2019-11-17 09:53:03 +01:00
parent 72b4bcbf1c
commit fc033cbf6f
1 changed files with 15 additions and 4 deletions
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19
sound/core/pcm_native.c
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@ -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;