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ASoC: add null_snd_soc_ops and reduce NULL ops check

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Double NULL pointer check for ops and ops->func is difficult to read
and might be forget to check it if new func was add.
This patch adds new null_snd_soc_ops and use it if rtd->dai_link didn't
have it to avoid NULL ops, and reduces ops NULL check.

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Kuninori Morimoto 2017-09-26 00:40:42 +00:00 committed by Mark Brown
parent 74b33b8481
commit 75ab9eb6f1
2 changed files with 13 additions and 8 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
sound/soc/soc-core.c
View File

@ -614,6 +614,8 @@ struct snd_pcm_substream *snd_soc_get_dai_substream(struct snd_soc_card *card,
}
EXPORT_SYMBOL_GPL(snd_soc_get_dai_substream);
static const struct snd_soc_ops null_snd_soc_ops;
static struct snd_soc_pcm_runtime *soc_new_pcm_runtime(
struct snd_soc_card *card, struct snd_soc_dai_link *dai_link)
{
@ -626,6 +628,9 @@ static struct snd_soc_pcm_runtime *soc_new_pcm_runtime(
INIT_LIST_HEAD(&rtd->component_list);
rtd->card = card;
rtd->dai_link = dai_link;
if (!rtd->dai_link->ops)
rtd->dai_link->ops = &null_snd_soc_ops;
rtd->codec_dais = kzalloc(sizeof(struct snd_soc_dai *) *
dai_link->num_codecs,
GFP_KERNEL);

16
sound/soc/soc-pcm.c
View File

@ -511,7 +511,7 @@ static int soc_pcm_open(struct snd_pcm_substream *substream)
codec_dai->rx_mask = 0;
}
if (rtd->dai_link->ops && rtd->dai_link->ops->startup) {
if (rtd->dai_link->ops->startup) {
ret = rtd->dai_link->ops->startup(substream);
if (ret < 0) {
pr_err("ASoC: %s startup failed: %d\n",
@ -585,7 +585,7 @@ dynamic:
return 0;
config_err:
if (rtd->dai_link->ops && rtd->dai_link->ops->shutdown)
if (rtd->dai_link->ops->shutdown)
rtd->dai_link->ops->shutdown(substream);
machine_err:
@ -692,7 +692,7 @@ static int soc_pcm_close(struct snd_pcm_substream *substream)
codec_dai->driver->ops->shutdown(substream, codec_dai);
}
if (rtd->dai_link->ops && rtd->dai_link->ops->shutdown)
if (rtd->dai_link->ops->shutdown)
rtd->dai_link->ops->shutdown(substream);
if (platform->driver->ops && platform->driver->ops->close)
@ -751,7 +751,7 @@ static int soc_pcm_prepare(struct snd_pcm_substream *substream)
mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
if (rtd->dai_link->ops && rtd->dai_link->ops->prepare) {
if (rtd->dai_link->ops->prepare) {
ret = rtd->dai_link->ops->prepare(substream);
if (ret < 0) {
dev_err(rtd->card->dev, "ASoC: machine prepare error:"
@ -855,7 +855,7 @@ static int soc_pcm_hw_params(struct snd_pcm_substream *substream,
int i, ret = 0;
mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
if (rtd->dai_link->ops && rtd->dai_link->ops->hw_params) {
if (rtd->dai_link->ops->hw_params) {
ret = rtd->dai_link->ops->hw_params(substream, params);
if (ret < 0) {
dev_err(rtd->card->dev, "ASoC: machine hw_params"
@ -948,7 +948,7 @@ codec_err:
codec_dai->rate = 0;
}
if (rtd->dai_link->ops && rtd->dai_link->ops->hw_free)
if (rtd->dai_link->ops->hw_free)
rtd->dai_link->ops->hw_free(substream);
mutex_unlock(&rtd->pcm_mutex);
@ -994,7 +994,7 @@ static int soc_pcm_hw_free(struct snd_pcm_substream *substream)
}
/* free any machine hw params */
if (rtd->dai_link->ops && rtd->dai_link->ops->hw_free)
if (rtd->dai_link->ops->hw_free)
rtd->dai_link->ops->hw_free(substream);
/* free any DMA resources */
@ -1045,7 +1045,7 @@ static int soc_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
return ret;
}
if (rtd->dai_link->ops && rtd->dai_link->ops->trigger) {
if (rtd->dai_link->ops->trigger) {
ret = rtd->dai_link->ops->trigger(substream, cmd);
if (ret < 0)
return ret;