--- zzzz-none-000/linux-3.10.107/sound/core/pcm_timer.c	2017-06-27 09:49:32.000000000 +0000
+++ scorpion-7490-727/linux-3.10.107/sound/core/pcm_timer.c	2021-02-04 17:41:59.000000000 +0000
@@ -53,7 +53,9 @@
 		post *= 2;
 	}
 	if (rate == 0) {
-		snd_printk(KERN_ERR "pcm timer resolution out of range (rate = %u, period_size = %lu)\n", runtime->rate, runtime->period_size);
+		pcm_err(substream->pcm,
+			"pcm timer resolution out of range (rate = %u, period_size = %lu)\n",
+			runtime->rate, runtime->period_size);
 		runtime->timer_resolution = -1;
 		return;
 	}
@@ -63,9 +65,16 @@
 static unsigned long snd_pcm_timer_resolution(struct snd_timer * timer)
 {
 	struct snd_pcm_substream *substream;
+	unsigned long ret = 0, flags = 0;
 	
 	substream = timer->private_data;
-	return substream->runtime ? substream->runtime->timer_resolution : 0;
+	spin_lock_irqsave(&substream->runtime_lock, flags);
+	if (substream->runtime)
+		ret = substream->runtime->timer_resolution;
+	else
+		ret = 0;
+	spin_unlock_irqrestore(&substream->runtime_lock, flags);
+	return ret;
 }
 
 static int snd_pcm_timer_start(struct snd_timer * timer)