[PATCH 5.8 051/118] ASoC: core: Do not cleanup uninitialized dais on soc_pcm_open failure

[Greg Kroah-Hartman]

From: Cezary Rojewski <cezary.rojewski@xxxxxxxxx>

[ Upstream commit 20244b2a8a8728c63233d33146e007dcacbcc5c4 ]

Introduce for_each_rtd_dais_rollback macro which behaves exactly like
for_each_codec_dais_rollback and its cpu_dais equivalent but for all
dais instead.

Use newly added macro to fix soc_pcm_open error path and prevent
uninitialized dais from being cleaned-up.

Signed-off-by: Cezary Rojewski <cezary.rojewski@xxxxxxxxx>
Fixes: 5d9fa03e6c35 ("ASoC: soc-pcm: tidyup soc_pcm_open() order")
Acked-by: Liam Girdwood <liam.r.girdwood@xxxxxxxxxxxxxxx>
Acked-by: Kuninori Morimoto <kuninori.morimoto.gx@xxxxxxxxxxx>
Link: https://lore.kernel.org/r/20200907111939.16169-1-cezary.rojewski@xxxxxxxxx
Signed-off-by: Mark Brown <broonie@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
 include/sound/soc.h | 2 ++
 sound/soc/soc-pcm.c | 2 +-
 2 files changed, 3 insertions(+), 1 deletion(-)

diff --git a/include/sound/soc.h b/include/sound/soc.h
index bc6ecb10c7649..ca765062787b0 100644
--- a/include/sound/soc.h
+++ b/include/sound/soc.h
@@ -1205,6 +1205,8 @@ struct snd_soc_pcm_runtime {
 	     ((i) < (rtd)->num_cpus + (rtd)->num_codecs) &&		\
 		     ((dai) = (rtd)->dais[i]);				\
 	     (i)++)
+#define for_each_rtd_dais_rollback(rtd, i, dai)		\
+	for (; (--(i) >= 0) && ((dai) = (rtd)->dais[i]);)
 
 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 74baf1fce053f..918ed77726cc0 100644
--- a/sound/soc/soc-pcm.c
+++ b/sound/soc/soc-pcm.c
@@ -811,7 +811,7 @@ dynamic:
 	return 0;
 
 config_err:
-	for_each_rtd_dais(rtd, i, dai)
+	for_each_rtd_dais_rollback(rtd, i, dai)
 		snd_soc_dai_shutdown(dai, substream);
 
 	snd_soc_link_shutdown(substream);
-- 
2.25.1