Merge remote-tracking branch 'asoc/topic/arizona' into asoc-next

sound/soc/codecs/arizona.c

@@ -1494,6 +1494,9 @@ static int arizona_startup(struct snd_pcm_substream *substream,
 	const struct snd_pcm_hw_constraint_list *constraint;
 	unsigned int base_rate;
 
+	if (!substream->runtime)
+		return 0;
+
 	switch (dai_priv->clk) {
 	case ARIZONA_CLK_SYSCLK:
 		base_rate = priv->sysclk;