[alsa-devel] [PATCH v3 02/19] ASoC: soc-core: tidyup soc_init_dai_link()

[Kuninori Morimoto]

Hi Jon

Thank you for reporting.

> I am seeing an audio regression on -next and bisect is pointing to
> this commit. I am seeing the following crash on boot during probe
> deferral of the soundcard ...

It seems timing bug.
I have a plan to post below patch if my current posting patch are accepted,
but it seems it is necessary immediately.
I believe your issue will be solved by this patch,
but can you please test it ?
I will formally post it with your tested-by if it was OK.

# It will be more cleanuped in the future,
# but it needs more other cleanup patches...

--------------------
Subject: [PATCH] ASoC: soc-core: care card_probed at soc_cleanup_card_resources()

soc_cleanup_card_resources() will call card->remove(), but it should be
called if card->probe() or card->late_probe() are called.
snd_soc_bind_card() might be error before calling
card->probe() / card->late_probe().
In that time, card->remove() will be called.
This patch adds card_probed parameter to judge it.

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx at renesas.com>
---
 sound/soc/soc-core.c | 15 ++++++++++-----
 1 file changed, 10 insertions(+), 5 deletions(-)

diff --git a/sound/soc/soc-core.c b/sound/soc/soc-core.c
index 55014e7..b078227 100644
--- a/sound/soc/soc-core.c
+++ b/sound/soc/soc-core.c
@@ -1980,7 +1980,8 @@ static void __soc_setup_card_name(char *name, int len,
 	}
 }
 
-static void soc_cleanup_card_resources(struct snd_soc_card *card)
+static void soc_cleanup_card_resources(struct snd_soc_card *card,
+				       int card_probed)
 {
 	struct snd_soc_dai_link *link, *_link;
 
@@ -2007,7 +2008,7 @@ static void soc_cleanup_card_resources(struct snd_soc_card *card)
 	soc_cleanup_card_debugfs(card);
 
 	/* remove the card */
-	if (card->remove)
+	if (card_probed && card->remove)
 		card->remove(card);
 }
 
@@ -2015,7 +2016,7 @@ static int snd_soc_instantiate_card(struct snd_soc_card *card)
 {
 	struct snd_soc_pcm_runtime *rtd;
 	struct snd_soc_dai_link *dai_link;
-	int ret, i;
+	int ret, i, card_probed = 0;
 
 	mutex_lock(&client_mutex);
 	mutex_lock_nested(&card->mutex, SND_SOC_CARD_CLASS_INIT);
@@ -2067,6 +2068,7 @@ static int snd_soc_instantiate_card(struct snd_soc_card *card)
 		ret = card->probe(card);
 		if (ret < 0)
 			goto probe_end;
+		card_probed = 1;
 	}
 
 	/* probe all components used by DAI links on this card */
@@ -2129,6 +2131,7 @@ static int snd_soc_instantiate_card(struct snd_soc_card *card)
 			goto probe_end;
 		}
 	}
+	card_probed = 1;
 
 	snd_soc_dapm_new_widgets(card);
 
@@ -2145,7 +2148,7 @@ static int snd_soc_instantiate_card(struct snd_soc_card *card)
 
 probe_end:
 	if (ret < 0)
-		soc_cleanup_card_resources(card);
+		soc_cleanup_card_resources(card, card_probed);
 
 	mutex_unlock(&card->mutex);
 	mutex_unlock(&client_mutex);
@@ -2439,11 +2442,13 @@ EXPORT_SYMBOL_GPL(snd_soc_register_card);
 static void snd_soc_unbind_card(struct snd_soc_card *card, bool unregister)
 {
 	if (card->instantiated) {
+		int card_probed = 1;
+
 		card->instantiated = false;
 		snd_soc_dapm_shutdown(card);
 		snd_soc_flush_all_delayed_work(card);
 
-		soc_cleanup_card_resources(card);
+		soc_cleanup_card_resources(card, card_probed);
 		if (!unregister)
 			list_add(&card->list, &unbind_card_list);
 	} else {
-- 
2.7.4




Thank you for your help !!
Best regards
---
Kuninori Morimoto