[PATCH v3] ASoC: SOF: ipc3-topology: Correct get_control_data for non bytes payload

[Sergey Senozhatsky]

On (22/04/27 22:08), Sergey Senozhatsky wrote:
> 
> I also have a 5.4 backport but it's entirely untested.

5.4

---

diff --git a/sound/soc/sof/topology.c b/sound/soc/sof/topology.c
index fa299e078156..a70b7e71c235 100644
--- a/sound/soc/sof/topology.c
+++ b/sound/soc/sof/topology.c
@@ -45,7 +45,8 @@
 struct sof_widget_data {
 	int ctrl_type;
 	int ipc_cmd;
-	struct sof_abi_hdr *pdata;
+	void *pdata;
+	size_t pdata_size;
 	struct snd_sof_control *control;
 };
 
@@ -1761,6 +1762,7 @@ static int sof_get_control_data(struct snd_sof_dev *sdev,
 				size_t *size)
 {
 	const struct snd_kcontrol_new *kc;
+	struct sof_ipc_ctrl_data *cdata;
 	struct soc_mixer_control *sm;
 	struct soc_bytes_ext *sbe;
 	struct soc_enum *se;
@@ -1797,15 +1799,25 @@ static int sof_get_control_data(struct snd_sof_dev *sdev,
 			return -EINVAL;
 		}
 
-		wdata[i].pdata = wdata[i].control->control_data->data;
-		if (!wdata[i].pdata)
-			return -EINVAL;
+		cdata = wdata[i].control->control_data;
+		if (widget->dobj.widget.kcontrol_type[i] == SND_SOC_TPLG_TYPE_BYTES) {
+			if (cdata->data->magic != SOF_ABI_MAGIC)
+				return -EINVAL;
 
-		/* make sure data is valid - data can be updated at runtime */
-		if (wdata[i].pdata->magic != SOF_ABI_MAGIC)
-			return -EINVAL;
+			wdata[i].pdata = cdata->data->data;
+			wdata[i].pdata_size = cdata->data->size;
+		} else {
+			/* points to the control data union */
+			wdata[i].pdata = cdata->chanv;
+			/*
+			 * wdata[i].control->size is calculated with struct_size
+			 * and includes the size of struct sof_ipc_ctrl_data
+			 */
+			wdata[i].pdata_size = wdata[i].control->size -
+					      sizeof(struct sof_ipc_ctrl_data);
+		}
 
-		*size += wdata[i].pdata->size;
+		*size += wdata[i].pdata_size;
 
 		/* get data type */
 		switch (wdata[i].control->cmd) {
@@ -1909,10 +1921,12 @@ static int sof_process_load(struct snd_soc_component *scomp, int index,
 	 */
 	if (ipc_data_size) {
 		for (i = 0; i < widget->num_kcontrols; i++) {
-			memcpy(&process->data + offset,
-			       wdata[i].pdata->data,
-			       wdata[i].pdata->size);
-			offset += wdata[i].pdata->size;
+			if (!wdata[i].pdata_size)
+				continue;
+
+			memcpy(&process->data[offset], wdata[i].pdata,
+			       wdata[i].pdata_size);
+			offset += wdata[i].pdata_size;
 		}
 	}