[PATCH] ASoC: qcom: qdsp6: fix device_node leak when parsing "iommus" phandle

[Selby Mashiki <mashikiselby@gmail.com>]

q6asm_dai_probe(), q6apm_dai_probe(), and q6usb_component_probe() call
of_parse_phandle_with_fixed_args() to parse the "iommus" property and
extract the stream ID from args.args[0], but never release the reference
acquired on args.np.

Call of_node_put(args.np) after reading args.args[0] in all three probe
functions.

Fixes: 2a9e92d371db ("ASoC: qdsp6: q6asm: Add q6asm dai driver")
Fixes: 9b4fe0f1cd79 ("ASoC: qdsp6: audioreach: add q6apm-dai support")
Fixes: 72b0b8b29980 ("ASoC: qcom: qdsp6: Add USB backend ASoC driver for Q6")
Signed-off-by: Selby Mashiki <mashikiselby@gmail.com>
---
 sound/soc/qcom/qdsp6/q6apm-dai.c | 6 ++++--
 sound/soc/qcom/qdsp6/q6asm-dai.c | 6 ++++--
 sound/soc/qcom/qdsp6/q6usb.c     | 4 +++-
 3 files changed, 11 insertions(+), 5 deletions(-)

diff --git a/sound/soc/qcom/qdsp6/q6apm-dai.c b/sound/soc/qcom/qdsp6/q6apm-dai.c
index bf1f872a0..49bd0582d 100644
--- a/sound/soc/qcom/qdsp6/q6apm-dai.c
+++ b/sound/soc/qcom/qdsp6/q6apm-dai.c
@@ -1030,10 +1030,12 @@ static int q6apm_dai_probe(struct platform_device *pdev)
 		return -ENOMEM;
 
 	rc = of_parse_phandle_with_fixed_args(node, "iommus", 1, 0, &args);
-	if (rc < 0)
+	if (rc < 0) {
 		pdata->sid = -1;
-	else
+	} else {
 		pdata->sid = args.args[0] & SID_MASK_DEFAULT;
+		of_node_put(args.np);
+	}
 
 	dev_set_drvdata(dev, pdata);
 
diff --git a/sound/soc/qcom/qdsp6/q6asm-dai.c b/sound/soc/qcom/qdsp6/q6asm-dai.c
index 4f09fdd40..f09856ee4 100644
--- a/sound/soc/qcom/qdsp6/q6asm-dai.c
+++ b/sound/soc/qcom/qdsp6/q6asm-dai.c
@@ -1309,10 +1309,12 @@ static int q6asm_dai_probe(struct platform_device *pdev)
 		return -ENOMEM;
 
 	rc = of_parse_phandle_with_fixed_args(node, "iommus", 1, 0, &args);
-	if (rc < 0)
+	if (rc < 0) {
 		pdata->sid = -1;
-	else
+	} else {
 		pdata->sid = args.args[0] & SID_MASK_DEFAULT;
+		of_node_put(args.np);
+	}
 
 	dev_set_drvdata(dev, pdata);
 
diff --git a/sound/soc/qcom/qdsp6/q6usb.c b/sound/soc/qcom/qdsp6/q6usb.c
index 6381b289c..5888bc41a 100644
--- a/sound/soc/qcom/qdsp6/q6usb.c
+++ b/sound/soc/qcom/qdsp6/q6usb.c
@@ -382,8 +382,10 @@ static int q6usb_dai_dev_probe(struct platform_device *pdev)
 	}
 
 	ret = of_parse_phandle_with_fixed_args(node, "iommus", 1, 0, &args);
-	if (!ret)
+	if (!ret) {
 		data->priv.sid = args.args[0] & Q6_USB_SID_MASK;
+		of_node_put(args.np);
+	}
 
 	ret = devm_mutex_init(dev, &data->mutex);
 	if (ret < 0)
-- 
2.56.0