ASoC: compress: Clarify the intent of current compressed ops handling

For callbacks configuring the state of the components (trigger,
set_params, ack and set_metadata) simplify the code a little and make
intention clearer by aborting as soon as an error is encountered. The
operation has already failed and there is nothing to be gained from
processing the callbacks on additional components. The operations
currently abort after the callbacks, so this simply shortens the
error path.

For callbacks returning information from the driver (copy,
get_metadata, pointer, get_codec_caps, get_caps and get_params)
only look for the first callback provided, currently the code will
call every callback only returning the information provided by the
last. Since we can only return one set of data, it makes no sense to
request the data from every component. Again this just makes the
currently supported feature set a little more clear.

Signed-off-by: Charles Keepax <ckeepax@opensource.cirrus.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

1 files changed, 48 insertions, 58 deletions

diff --git a/sound/soc/soc-compress.c b/sound/soc/soc-compress.c
index 699397a09167..fc8742383b23 100644
--- a/sound/soc/soc-compress.c
+++ b/sound/soc/soc-compress.c
@@ -353,7 +353,7 @@ static int soc_compr_trigger(struct snd_compr_stream *cstream, int cmd)
 	struct snd_soc_rtdcom_list *rtdcom;
 	struct snd_soc_dai *codec_dai = rtd->codec_dai;
 	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
-	int ret = 0, __ret;
+	int ret = 0;
 
 	mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
 
@@ -364,12 +364,10 @@ static int soc_compr_trigger(struct snd_compr_stream *cstream, int cmd)
 		    !component->driver->compr_ops->trigger)
 			continue;
 
-		__ret = component->driver->compr_ops->trigger(cstream, cmd);
-		if (__ret < 0)
-			ret = __ret;
+		ret = component->driver->compr_ops->trigger(cstream, cmd);
+		if (ret < 0)
+			goto out;
 	}
-	if (ret < 0)
-		goto out;
 
 	if (cpu_dai->driver->cops && cpu_dai->driver->cops->trigger)
 		cpu_dai->driver->cops->trigger(cstream, cmd, cpu_dai);
@@ -394,7 +392,7 @@ static int soc_compr_trigger_fe(struct snd_compr_stream *cstream, int cmd)
 	struct snd_soc_component *component;
 	struct snd_soc_rtdcom_list *rtdcom;
 	struct snd_soc_dai *cpu_dai = fe->cpu_dai;
-	int ret = 0, __ret, stream;
+	int ret, stream;
 
 	if (cmd == SND_COMPR_TRIGGER_PARTIAL_DRAIN ||
 		cmd == SND_COMPR_TRIGGER_DRAIN) {
@@ -406,9 +404,10 @@ static int soc_compr_trigger_fe(struct snd_compr_stream *cstream, int cmd)
 			    !component->driver->compr_ops->trigger)
 				continue;
 
-			__ret = component->driver->compr_ops->trigger(cstream, cmd);
-			if (__ret < 0)
-				ret = __ret;
+			ret = component->driver->compr_ops->trigger(cstream,
+								    cmd);
+			if (ret < 0)
+				return ret;
 		}
 		return ret;
 	}
@@ -433,12 +432,10 @@ static int soc_compr_trigger_fe(struct snd_compr_stream *cstream, int cmd)
 		    !component->driver->compr_ops->trigger)
 			continue;
 
-		__ret = component->driver->compr_ops->trigger(cstream, cmd);
-		if (__ret < 0)
-			ret = __ret;
+		ret = component->driver->compr_ops->trigger(cstream, cmd);
+		if (ret < 0)
+			goto out;
 	}
-	if (ret < 0)
-		goto out;
 
 	fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE;
 
@@ -472,7 +469,7 @@ static int soc_compr_set_params(struct snd_compr_stream *cstream,
 	struct snd_soc_component *component;
 	struct snd_soc_rtdcom_list *rtdcom;
 	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
-	int ret = 0, __ret;
+	int ret;
 
 	mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
 
@@ -496,12 +493,10 @@ static int soc_compr_set_params(struct snd_compr_stream *cstream,
 		    !component->driver->compr_ops->set_params)
 			continue;
 
-		__ret = component->driver->compr_ops->set_params(cstream, params);
-		if (__ret < 0)
-			ret = __ret;
+		ret = component->driver->compr_ops->set_params(cstream, params);
+		if (ret < 0)
+			goto err;
 	}
-	if (ret < 0)
-		goto err;
 
 	if (rtd->dai_link->compr_ops && rtd->dai_link->compr_ops->set_params) {
 		ret = rtd->dai_link->compr_ops->set_params(cstream);
@@ -522,7 +517,7 @@ static int soc_compr_set_params(struct snd_compr_stream *cstream,
 
 	cancel_delayed_work_sync(&rtd->delayed_work);
 
-	return ret;
+	return 0;
 
 err:
 	mutex_unlock(&rtd->pcm_mutex);
@@ -538,7 +533,7 @@ static int soc_compr_set_params_fe(struct snd_compr_stream *cstream,
 	struct snd_soc_component *component;
 	struct snd_soc_rtdcom_list *rtdcom;
 	struct snd_soc_dai *cpu_dai = fe->cpu_dai;
-	int ret = 0, __ret, stream;
+	int ret, stream;
 
 	if (cstream->direction == SND_COMPRESS_PLAYBACK)
 		stream = SNDRV_PCM_STREAM_PLAYBACK;
@@ -578,12 +573,10 @@ static int soc_compr_set_params_fe(struct snd_compr_stream *cstream,
 		    !component->driver->compr_ops->set_params)
 			continue;
 
-		__ret = component->driver->compr_ops->set_params(cstream, params);
-		if (__ret < 0)
-			ret = __ret;
+		ret = component->driver->compr_ops->set_params(cstream, params);
+		if (ret < 0)
+			goto out;
 	}
-	if (ret < 0)
-		goto out;
 
 	if (fe->dai_link->compr_ops && fe->dai_link->compr_ops->set_params) {
 		ret = fe->dai_link->compr_ops->set_params(cstream);
@@ -607,7 +600,7 @@ static int soc_compr_get_params(struct snd_compr_stream *cstream,
 	struct snd_soc_component *component;
 	struct snd_soc_rtdcom_list *rtdcom;
 	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
-	int ret = 0, __ret;
+	int ret = 0;
 
 	mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
 
@@ -624,9 +617,8 @@ static int soc_compr_get_params(struct snd_compr_stream *cstream,
 		    !component->driver->compr_ops->get_params)
 			continue;
 
-		__ret = component->driver->compr_ops->get_params(cstream, params);
-		if (__ret < 0)
-			ret = __ret;
+		ret = component->driver->compr_ops->get_params(cstream, params);
+		break;
 	}
 
 err:
@@ -640,7 +632,7 @@ static int soc_compr_get_caps(struct snd_compr_stream *cstream,
 	struct snd_soc_pcm_runtime *rtd = cstream->private_data;
 	struct snd_soc_component *component;
 	struct snd_soc_rtdcom_list *rtdcom;
-	int ret = 0, __ret;
+	int ret = 0;
 
 	mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
 
@@ -651,9 +643,8 @@ static int soc_compr_get_caps(struct snd_compr_stream *cstream,
 		    !component->driver->compr_ops->get_caps)
 			continue;
 
-		__ret = component->driver->compr_ops->get_caps(cstream, caps);
-		if (__ret < 0)
-			ret = __ret;
+		ret = component->driver->compr_ops->get_caps(cstream, caps);
+		break;
 	}
 
 	mutex_unlock(&rtd->pcm_mutex);
@@ -666,7 +657,7 @@ static int soc_compr_get_codec_caps(struct snd_compr_stream *cstream,
 	struct snd_soc_pcm_runtime *rtd = cstream->private_data;
 	struct snd_soc_component *component;
 	struct snd_soc_rtdcom_list *rtdcom;
-	int ret = 0, __ret;
+	int ret = 0;
 
 	mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
 
@@ -677,9 +668,9 @@ static int soc_compr_get_codec_caps(struct snd_compr_stream *cstream,
 		    !component->driver->compr_ops->get_codec_caps)
 			continue;
 
-		__ret = component->driver->compr_ops->get_codec_caps(cstream, codec);
-		if (__ret < 0)
-			ret = __ret;
+		ret = component->driver->compr_ops->get_codec_caps(cstream,
+								   codec);
+		break;
 	}
 
 	mutex_unlock(&rtd->pcm_mutex);
@@ -692,7 +683,7 @@ static int soc_compr_ack(struct snd_compr_stream *cstream, size_t bytes)
 	struct snd_soc_component *component;
 	struct snd_soc_rtdcom_list *rtdcom;
 	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
-	int ret = 0, __ret;
+	int ret = 0;
 
 	mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
 
@@ -709,9 +700,9 @@ static int soc_compr_ack(struct snd_compr_stream *cstream, size_t bytes)
 		    !component->driver->compr_ops->ack)
 			continue;
 
-		__ret = component->driver->compr_ops->ack(cstream, bytes);
-		if (__ret < 0)
-			ret = __ret;
+		ret = component->driver->compr_ops->ack(cstream, bytes);
+		if (ret < 0)
+			goto err;
 	}
 
 err:
@@ -725,7 +716,7 @@ static int soc_compr_pointer(struct snd_compr_stream *cstream,
 	struct snd_soc_pcm_runtime *rtd = cstream->private_data;
 	struct snd_soc_component *component;
 	struct snd_soc_rtdcom_list *rtdcom;
-	int ret = 0, __ret;
+	int ret = 0;
 	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 
 	mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
@@ -740,9 +731,8 @@ static int soc_compr_pointer(struct snd_compr_stream *cstream,
 		    !component->driver->compr_ops->pointer)
 			continue;
 
-		__ret = component->driver->compr_ops->pointer(cstream, tstamp);
-		if (__ret < 0)
-			ret = __ret;
+		ret = component->driver->compr_ops->pointer(cstream, tstamp);
+		break;
 	}
 
 	mutex_unlock(&rtd->pcm_mutex);
@@ -781,7 +771,7 @@ static int soc_compr_set_metadata(struct snd_compr_stream *cstream,
 	struct snd_soc_component *component;
 	struct snd_soc_rtdcom_list *rtdcom;
 	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
-	int ret = 0, __ret;
+	int ret;
 
 	if (cpu_dai->driver->cops && cpu_dai->driver->cops->set_metadata) {
 		ret = cpu_dai->driver->cops->set_metadata(cstream, metadata, cpu_dai);
@@ -796,12 +786,13 @@ static int soc_compr_set_metadata(struct snd_compr_stream *cstream,
 		    !component->driver->compr_ops->set_metadata)
 			continue;
 
-		__ret = component->driver->compr_ops->set_metadata(cstream, metadata);
-		if (__ret < 0)
-			ret = __ret;
+		ret = component->driver->compr_ops->set_metadata(cstream,
+								 metadata);
+		if (ret < 0)
+			return ret;
 	}
 
-	return ret;
+	return 0;
 }
 
 static int soc_compr_get_metadata(struct snd_compr_stream *cstream,
@@ -811,7 +802,7 @@ static int soc_compr_get_metadata(struct snd_compr_stream *cstream,
 	struct snd_soc_component *component;
 	struct snd_soc_rtdcom_list *rtdcom;
 	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
-	int ret = 0, __ret;
+	int ret;
 
 	if (cpu_dai->driver->cops && cpu_dai->driver->cops->get_metadata) {
 		ret = cpu_dai->driver->cops->get_metadata(cstream, metadata, cpu_dai);
@@ -826,12 +817,11 @@ static int soc_compr_get_metadata(struct snd_compr_stream *cstream,
 		    !component->driver->compr_ops->get_metadata)
 			continue;
 
-		__ret = component->driver->compr_ops->get_metadata(cstream, metadata);
-		if (__ret < 0)
-			ret = __ret;
+		return component->driver->compr_ops->get_metadata(cstream,
+								  metadata);
 	}
 
-	return ret;
+	return 0;
 }
 
 /* ASoC Compress operations */