[PATCH 5.8 332/464] ASoC: soc-core: Fix regression causing sysfs entries to disappear

From: Greg Kroah-Hartman
Date: Mon Aug 17 2020 - 15:26:27 EST


From: Charles Keepax <ckeepax@xxxxxxxxxxxxxxxxxxxxx>

[ Upstream commit 5c74c9d34aec1ac756de6979dd5580096aba8643 ]

The allocation order of things in soc_new_pcm_runtime was changed to
move the device_register before the allocation of the rtd structure.
This was to allow the rtd allocation to be managed by devm. However
currently the sysfs entries are added by device_register and their
visibility depends on variables within the rtd structure, this causes
the pmdown_time and dapm_widgets sysfs entries to be missing for all
rtds.

Correct this issue by manually calling device_add_groups after the
appropriate information is available.

Fixes: d918a37610b1 ("ASoC: soc-core: tidyup soc_new_pcm_runtime() alloc order")
Signed-off-by: Charles Keepax <ckeepax@xxxxxxxxxxxxxxxxxxxxx>
Link: https://lore.kernel.org/r/20200730120715.637-1-ckeepax@xxxxxxxxxxxxxxxxxxxxx
Signed-off-by: Mark Brown <broonie@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
sound/soc/soc-core.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/sound/soc/soc-core.c b/sound/soc/soc-core.c
index 2b8abf88ec603..f1d641cd48da9 100644
--- a/sound/soc/soc-core.c
+++ b/sound/soc/soc-core.c
@@ -446,7 +446,6 @@ static struct snd_soc_pcm_runtime *soc_new_pcm_runtime(

dev->parent = card->dev;
dev->release = soc_release_rtd_dev;
- dev->groups = soc_dev_attr_groups;

dev_set_name(dev, "%s", dai_link->name);

@@ -503,6 +502,10 @@ static struct snd_soc_pcm_runtime *soc_new_pcm_runtime(
/* see for_each_card_rtds */
list_add_tail(&rtd->list, &card->rtd_list);

+ ret = device_add_groups(dev, soc_dev_attr_groups);
+ if (ret < 0)
+ goto free_rtd;
+
return rtd;

free_rtd:
--
2.25.1