ASoC: SOF: ipc4: avoid uninitialized default instance 0

When a pipeline contains multiple DAI widgets, the pipe_widget is not
set up except for the first DAI. This result in the pipe_widget having
a default instance 0, which can conflict with another real the
pipeline instance 0 and leads to spurious transitions.

This patch makes sure the instance_id is properly initialized to a
-EINVAL value.
Signed-off-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Link: https://lore.kernel.org/r/20230807210959.506849-4-pierre-louis.bossart@linux.intel.comSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/sof/intel/hda-dai-ops.c

@@ -234,6 +234,9 @@ static int hda_ipc4_pre_trigger(struct snd_sof_dev *sdev, struct snd_soc_dai *cp
 	pipe_widget = swidget->spipe->pipe_widget;
 	pipeline = pipe_widget->private;
 
+	if (pipe_widget->instance_id < 0)
+		return 0;
+
 	mutex_lock(&ipc4_data->pipeline_state_mutex);
 
 	switch (cmd) {
@@ -297,6 +300,9 @@ static int hda_ipc4_post_trigger(struct snd_sof_dev *sdev, struct snd_soc_dai *c
 	pipe_widget = swidget->spipe->pipe_widget;
 	pipeline = pipe_widget->private;
 
+	if (pipe_widget->instance_id < 0)
+		return 0;
+
 	mutex_lock(&ipc4_data->pipeline_state_mutex);
 
 	switch (cmd) {

sound/soc/sof/ipc4-topology.c

@@ -2319,6 +2319,7 @@ static int sof_ipc4_widget_free(struct snd_sof_dev *sdev, struct snd_sof_widget
 		pipeline->mem_usage = 0;
 		pipeline->state = SOF_IPC4_PIPE_UNINITIALIZED;
 		ida_free(&pipeline_ida, swidget->instance_id);
+		swidget->instance_id = -EINVAL;
 	} else {
 		struct snd_sof_widget *pipe_widget = swidget->spipe->pipe_widget;
 		struct sof_ipc4_pipeline *pipeline = pipe_widget->private;

sound/soc/sof/topology.c

@@ -2157,6 +2157,8 @@ static int sof_complete(struct snd_soc_component *scomp)
 		struct snd_sof_widget *pipe_widget = spipe->pipe_widget;
 		struct snd_sof_widget *swidget;
 
+		pipe_widget->instance_id = -EINVAL;
+
 		/* Update the scheduler widget's IPC structure */
 		if (widget_ops && widget_ops[pipe_widget->id].ipc_setup) {
 			ret = widget_ops[pipe_widget->id].ipc_setup(pipe_widget);