dp: Allow scheduling of already running DP task

The DP task is started at pipeline start and stopped when the DP module
is freed. Since the pipeline can be paused and resumed multiple times, DP
task start may be called when the task is already queued/running.

This commit allows the DP task to be scheduled even when it was already
started. This fixes DP tests with multiple pipeline pause/resume cycles.

Signed-off-by: Serhiy Katsyuba <serhiy.katsyuba@intel.com>

Author: serhiy-katsyuba-intel

src/schedule/zephyr_dp_schedule.c

@@ -325,6 +325,12 @@ static int scheduler_dp_task_shedule(void *data, struct task *task, uint64_t sta
 
 	lock_key = scheduler_dp_lock(cpu_get_id());
 
+	if (task_is_active(task)) {
+		scheduler_dp_unlock(lock_key);
+		tr_dbg(&dp_tr, "DP task already active");
+		return 0;
+	}
+
 	if (task->state != SOF_TASK_STATE_INIT &&
 	    task->state != SOF_TASK_STATE_CANCEL &&
 	    task->state != SOF_TASK_STATE_COMPLETED) {