diff --git a/sound/firewire/amdtp-stream.c b/sound/firewire/amdtp-stream.c
index 72cb67d88bd8..5f0f8d9c08d1 100644
--- a/sound/firewire/amdtp-stream.c
+++ b/sound/firewire/amdtp-stream.c
@@ -615,16 +615,8 @@ static void update_pcm_pointers(struct amdtp_stream *s,
 		// The program in user process should periodically check the status of intermediate
 		// buffer associated to PCM substream to process PCM frames in the buffer, instead
 		// of receiving notification of period elapsed by poll wait.
-		if (!pcm->runtime->no_period_wakeup) {
-			if (in_softirq()) {
-				// In software IRQ context for 1394 OHCI.
-				snd_pcm_period_elapsed(pcm);
-			} else {
-				// In process context of ALSA PCM application under acquired lock of
-				// PCM substream.
-				snd_pcm_period_elapsed_under_stream_lock(pcm);
-			}
-		}
+		if (!pcm->runtime->no_period_wakeup)
+			queue_work(system_highpri_wq, &s->period_work);
 	}
 }
 
@@ -1866,11 +1858,14 @@ unsigned long amdtp_domain_stream_pcm_pointer(struct amdtp_domain *d,
 {
 	struct amdtp_stream *irq_target = d->irq_target;
 
-	// Process isochronous packets queued till recent isochronous cycle to handle PCM frames.
 	if (irq_target && amdtp_stream_running(irq_target)) {
-		// In software IRQ context, the call causes dead-lock to disable the tasklet
-		// synchronously.
-		if (!in_softirq())
+		// use wq to prevent AB/BA deadlock competition for
+		// substream lock:
+		// fw_iso_context_flush_completions() acquires
+		// lock by ohci_flush_iso_completions(),
+		// amdtp-stream process_rx_packets() attempts to
+		// acquire same lock by snd_pcm_elapsed()
+		if (current_work() != &s->period_work)
 			fw_iso_context_flush_completions(irq_target->context);
 	}