[PATCH 1/8] ASoC: pcm: Reverse iterate DAIs when shutting them down

[Cezary Rojewski <cezary.rojewski@intel.com>]

During startup snd_soc_dai_startup() is launched in ascending order and
the exact same thing is done during shutdown procedure. Reverse the
order in the latter so that it is symmetric to the former.

Signed-off-by: Cezary Rojewski <cezary.rojewski@intel.com>
---
 include/sound/soc.h | 4 ++++
 sound/soc/soc-pcm.c | 2 +-
 2 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/include/sound/soc.h b/include/sound/soc.h
index 0376f7e4c15d..a4747c3d0856 100644
--- a/include/sound/soc.h
+++ b/include/sound/soc.h
@@ -1225,6 +1225,10 @@ struct snd_soc_pcm_runtime {
 	     ((i) < (rtd)->dai_link->num_cpus + (rtd)->dai_link->num_codecs) &&	\
 		     ((dai) = (rtd)->dais[i]);				\
 	     (i)++)
+#define for_each_rtd_dais_reverse(rtd, i, dai)					\
+	for ((i) = (rtd)->dai_link->num_cpus + (rtd)->dai_link->num_codecs - 1;	\
+	     (i) >= 0 && ((dai) = (rtd)->dais[i]);				\
+	     (i)--)
 #define for_each_rtd_ch_maps(rtd, i, ch_maps) for_each_link_ch_maps(rtd->dai_link, i, ch_maps)
 
 void snd_soc_close_delayed_work(struct snd_soc_pcm_runtime *rtd);
diff --git a/sound/soc/soc-pcm.c b/sound/soc/soc-pcm.c
index b0e1bd7f588b..711b2f49ed88 100644
--- a/sound/soc/soc-pcm.c
+++ b/sound/soc/soc-pcm.c
@@ -724,7 +724,7 @@ static int soc_pcm_clean(struct snd_soc_pcm_runtime *rtd,
 		}
 	}
 
-	for_each_rtd_dais(rtd, i, dai)
+	for_each_rtd_dais_reverse(rtd, i, dai)
 		snd_soc_dai_shutdown(dai, substream, rollback);
 
 	snd_soc_link_shutdown(substream, rollback);
-- 
2.25.1