ASoC: SOF: (cosmetic) remove redundant "ret" variable uses

In some cases no "ret" variable is even needed, those functions always
return 0 anyway, in other cases "ret" initialisation is redundant.
Signed-off-by: Guennadi Liakhovetski <guennadi.liakhovetski@linux.intel.com>
Reviewed-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Signed-off-by: Kai Vehmanen <kai.vehmanen@linux.intel.com>
Link: https://lore.kernel.org/r/20200917105633.2579047-6-kai.vehmanen@linux.intel.comSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/sof/control.c

@@ -221,7 +221,6 @@ int snd_sof_bytes_get(struct snd_kcontrol *kcontrol,
 	struct sof_ipc_ctrl_data *cdata = scontrol->control_data;
 	struct sof_abi_hdr *data = cdata->data;
 	size_t size;
-	int ret = 0;
 
 	if (be->max > sizeof(ucontrol->value.bytes.data)) {
 		dev_err_ratelimited(scomp->dev,
@@ -235,15 +234,13 @@ int snd_sof_bytes_get(struct snd_kcontrol *kcontrol,
 		dev_err_ratelimited(scomp->dev,
 				    "error: DSP sent %zu bytes max is %d\n",
 				    size, be->max);
-		ret = -EINVAL;
-		goto out;
+		return -EINVAL;
 	}
 
 	/* copy back to kcontrol */
 	memcpy(ucontrol->value.bytes.data, data, size);
 
-out:
-	return ret;
+	return 0;
 }
 
 int snd_sof_bytes_put(struct snd_kcontrol *kcontrol,
@@ -424,7 +421,6 @@ int snd_sof_bytes_ext_get(struct snd_kcontrol *kcontrol,
 	struct snd_ctl_tlv __user *tlvd =
 		(struct snd_ctl_tlv __user *)binary_data;
 	int data_size;
-	int ret = 0;
 
 	/*
 	 * Decrement the limit by ext bytes header size to
@@ -443,20 +439,16 @@ int snd_sof_bytes_ext_get(struct snd_kcontrol *kcontrol,
 	if (data_size > be->max) {
 		dev_err_ratelimited(scomp->dev, "error: user data size %d exceeds max size %d.\n",
 				    data_size, be->max);
-		ret = -EINVAL;
-		goto out;
+		return -EINVAL;
 	}
 
 	header.numid = scontrol->cmd;
 	header.length = data_size;
-	if (copy_to_user(tlvd, &header, sizeof(const struct snd_ctl_tlv))) {
-		ret = -EFAULT;
-		goto out;
-	}
+	if (copy_to_user(tlvd, &header, sizeof(const struct snd_ctl_tlv)))
+		return -EFAULT;
 
 	if (copy_to_user(tlvd->tlv, cdata->data, data_size))
-		ret = -EFAULT;
+		return -EFAULT;
 
-out:
-	return ret;
+	return 0;
 }

sound/soc/sof/topology.c

@@ -63,7 +63,7 @@ static int ipc_pcm_params(struct snd_sof_widget *swidget, int dir)
 	struct sof_ipc_pcm_params pcm;
 	struct snd_pcm_hw_params *params;
 	struct snd_sof_pcm *spcm;
-	int ret = 0;
+	int ret;
 
 	memset(&pcm, 0, sizeof(pcm));
 
@@ -121,7 +121,7 @@ static int ipc_trigger(struct snd_sof_widget *swidget, int cmd)
 	struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(scomp);
 	struct sof_ipc_stream stream;
 	struct sof_ipc_reply reply;
-	int ret = 0;
+	int ret;
 
 	/* set IPC stream params */
 	stream.hdr.size = sizeof(stream);
@@ -1033,7 +1033,7 @@ static int sof_control_load_volume(struct snd_soc_component *scomp,
 	struct sof_ipc_ctrl_data *cdata;
 	int tlv[TLV_ITEMS];
 	unsigned int i;
-	int ret = 0;
+	int ret;
 
 	/* validate topology data */
 	if (le32_to_cpu(mc->num_channels) > SND_SOC_TPLG_MAX_CHAN) {
@@ -1098,7 +1098,7 @@ static int sof_control_load_volume(struct snd_soc_component *scomp,
 	dev_dbg(scomp->dev, "tplg: load kcontrol index %d chans %d\n",
 		scontrol->comp_id, scontrol->num_channels);
 
-	return ret;
+	return 0;
 
 out_free_table:
 	if (le32_to_cpu(mc->max) > 1)
@@ -1151,7 +1151,7 @@ static int sof_control_load_bytes(struct snd_soc_component *scomp,
 		container_of(hdr, struct snd_soc_tplg_bytes_control, hdr);
 	struct soc_bytes_ext *sbe = (struct soc_bytes_ext *)kc->private_value;
 	int max_size = sbe->max;
-	int ret = 0;
+	int ret;
 
 	/* init the get/put bytes data */
 	scontrol->size = sizeof(struct sof_ipc_ctrl_data) +
@@ -1204,7 +1204,7 @@ static int sof_control_load_bytes(struct snd_soc_component *scomp,
 		}
 	}
 
-	return ret;
+	return 0;
 
 out_free:
 	kfree(scontrol->control_data);
@@ -1223,7 +1223,7 @@ static int sof_control_load(struct snd_soc_component *scomp, int index,
 	struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(scomp);
 	struct snd_soc_dobj *dobj;
 	struct snd_sof_control *scontrol;
-	int ret = -EINVAL;
+	int ret;
 
 	dev_dbg(scomp->dev, "tplg: load control type %d name : %s\n",
 		hdr->type, hdr->name);
@@ -1276,7 +1276,7 @@ static int sof_control_load(struct snd_soc_component *scomp, int index,
 
 	dobj->private = scontrol;
 	list_add(&scontrol->list, &sdev->kcontrol_list);
-	return ret;
+	return 0;
 }
 
 static int sof_control_unload(struct snd_soc_component *scomp,
@@ -2659,7 +2659,7 @@ static int sof_dai_load(struct snd_soc_component *scomp, int index,
 	struct snd_soc_tplg_private *private = &pcm->priv;
 	struct snd_sof_pcm *spcm;
 	int stream;
-	int ret = 0;
+	int ret;
 
 	/* nothing to do for BEs atm */
 	if (!pcm)
@@ -3350,7 +3350,6 @@ static int sof_link_hda_unload(struct snd_sof_dev *sdev,
 			       struct snd_soc_dai_link *link)
 {
 	struct snd_soc_dai *dai;
-	int ret = 0;
 
 	dai = snd_soc_find_dai(link->cpus);
 	if (!dai) {
@@ -3359,7 +3358,7 @@ static int sof_link_hda_unload(struct snd_sof_dev *sdev,
 		return -EINVAL;
 	}
 
-	return ret;
+	return 0;
 }
 
 static int sof_link_unload(struct snd_soc_component *scomp,
@@ -3492,7 +3491,6 @@ static int sof_route_load(struct snd_soc_component *scomp, int index,
 	    sink_swidget->id != snd_soc_dapm_buffer) {
 		dev_dbg(scomp->dev, "warning: neither Linked source component %s nor sink component %s is of buffer type, ignoring link\n",
 			route->source, route->sink);
-		ret = 0;
 		goto err;
 	} else {
 		ret = sof_ipc_tx_message(sdev->ipc,
@@ -3526,7 +3524,7 @@ static int sof_route_load(struct snd_soc_component *scomp, int index,
 		/* add route to route list */
 		list_add(&sroute->list, &sdev->route_list);
 
-		return ret;
+		return 0;
 	}
 
 err: