[alsa-devel] Applied "ASoC: qcom: Fix of-node refcount unbalance in apq8016_sbc_parse_of()" to the asoc tree

[Mark Brown]

The patch

   ASoC: qcom: Fix of-node refcount unbalance in apq8016_sbc_parse_of()

has been applied to the asoc tree at

   https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git 

All being well this means that it will be integrated into the linux-next
tree (usually sometime in the next 24 hours) and sent to Linus during
the next merge window (or sooner if it is a bug fix), however if
problems are discovered then the patch may be dropped or reverted.  

You may get further e-mails resulting from automated or manual testing
and review of the tree, please engage with people reporting problems and
send followup patches addressing any issues that are reported if needed.

If any updates are required or you are submitting further changes they
should be sent as incremental updates against current git, existing
patches will not be replaced.

Please add any relevant lists and maintainers to the CCs when replying
to this mail.

Thanks,
Mark

>From 8d1667200850f8753c0265fa4bd25c9a6e5f94ce Mon Sep 17 00:00:00 2001
From: Takashi Iwai <tiwai at suse.de>
Date: Tue, 19 Feb 2019 16:46:50 +0100
Subject: [PATCH] ASoC: qcom: Fix of-node refcount unbalance in
 apq8016_sbc_parse_of()

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 at codeaurora.org>
Cc: Banajit Goswami <bgoswami at codeaurora.org>
Signed-off-by: Takashi Iwai <tiwai at suse.de>
Signed-off-by: Mark Brown <broonie at 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 1dd23bba1bed..4b559932adc3 100644
--- a/sound/soc/qcom/apq8016_sbc.c
+++ b/sound/soc/qcom/apq8016_sbc.c
@@ -164,41 +164,52 @@ 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;
 		}
 
 		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_link_codecs(dev, codec, link);
 
 		if (ret < 0) {
 			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