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authorTakashi Iwai <tiwai@suse.de>2019-11-17 09:53:03 +0100
committerTakashi Iwai <tiwai@suse.de>2019-11-20 19:39:54 +0100
commitfc033cbf6fb75452f03774ca5adccac8cf9bc84f (patch)
tree9559f718dd7d43e613becd962bcc9d6d65c7885c /sound/core
parent72b4bcbf1c96c766a0c037a665ef5bbe62bb2628 (diff)
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.c19
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;