[PATCH AUTOSEL 4.9 082/251] ASoC: qcom: Fix of-node refcount unbalance in apq8016_sbc_parse_of()

Sasha Levin
2020-01-16T18:11:12Z

From: Takashi Iwai <tiwai@suse.de>

[ Upstream commit 8d1667200850f8753c0265fa4bd25c9a6e5f94ce ]

The apq8016 driver leaves the of-node refcount at aborting from the
loop of for_each_child_of_node() in the error path. Not only the
iterator node of for_each_child_of_node(), the children nodes referred
from it for codec and cpu have to be properly unreferenced.

Fixes: bdb052e81f62 ("ASoC: qcom: add apq8016 sound card support")
Cc: Patrick Lai <plai@codeaurora.org>
Cc: Banajit Goswami <bgoswami@codeaurora.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
sound/soc/qcom/apq8016_sbc.c | 21 ++++++++++++++++-----
1 file changed, 16 insertions(+), 5 deletions(-)

diff --git a/sound/soc/qcom/apq8016_sbc.c b/sound/soc/qcom/apq8016_sbc.c
index 07f91e918b23..754742018515 100644
--- a/sound/soc/qcom/apq8016_sbc.c
+++ b/sound/soc/qcom/apq8016_sbc.c
@@ -114,13 +114,15 @@ static struct apq8016_sbc_data *apq8016_sbc_parse_of(struct snd_soc_card *card)

if (!cpu || !codec) {
dev_err(dev, "Can't find cpu/codec DT node\n");
- return ERR_PTR(-EINVAL);
+ ret = -EINVAL;
+ goto error;
}

link->cpu_of_node = of_parse_phandle(cpu, "sound-dai", 0);
if (!link->cpu_of_node) {
dev_err(card->dev, "error getting cpu phandle\n");
- return ERR_PTR(-EINVAL);
+ ret = -EINVAL;
+ goto error;
}

link->codec_of_node = of_parse_phandle(codec, "sound-dai", 0);
@@ -132,28 +134,37 @@ static struct apq8016_sbc_data *apq8016_sbc_parse_of(struct snd_soc_card *card)
ret = snd_soc_of_get_dai_name(cpu, &link->cpu_dai_name);
if (ret) {
dev_err(card->dev, "error getting cpu dai name\n");
- return ERR_PTR(ret);
+ goto error;
}

ret = snd_soc_of_get_dai_name(codec, &link->codec_dai_name);
if (ret) {
dev_err(card->dev, "error getting codec dai name\n");
- return ERR_PTR(ret);
+ goto error;
}

link->platform_of_node = link->cpu_of_node;
ret = of_property_read_string(np, "link-name", &link->name);
if (ret) {
dev_err(card->dev, "error getting codec dai_link name\n");
- return ERR_PTR(ret);
+ goto error;
}

link->stream_name = link->name;
link->init = apq8016_sbc_dai_init;
link++;
+
+ of_node_put(cpu);
+ of_node_put(codec);
}

return data;
+
+ error:
+ of_node_put(np);
+ of_node_put(cpu);
+ of_node_put(codec);
+ return ERR_PTR(ret);
}

static const struct snd_soc_dapm_widget apq8016_sbc_dapm_widgets[] = {
--
2.20.1