linux-kernel - [PATCH 5.15 179/189] soc: qcom: aoss: Fix missing put_device call in qmp

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Date:   Mon, 18 Apr 2022 14:13:19 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Miaoqian Lin <linmq006@...il.com>,
        Stephen Boyd <swboyd@...omium.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>
Subject: [PATCH 5.15 179/189] soc: qcom: aoss: Fix missing put_device call in qmp_get

From: Miaoqian Lin <linmq006@...il.com>

commit 4b41a9d0fe3db5f91078a380f62f0572c3ecf2dd upstream.

The reference taken by 'of_find_device_by_node()' must be released when
not needed anymore.
Add the corresponding 'put_device()' in the error handling paths.

Fixes: 8c75d585b931 ("soc: qcom: aoss: Expose send for generic usecase")
Signed-off-by: Miaoqian Lin <linmq006@...il.com>
Reviewed-by: Stephen Boyd <swboyd@...omium.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@...aro.org>
Link: https://lore.kernel.org/r/20220108095931.21527-1-linmq006@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/soc/qcom/qcom_aoss.c |    6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

--- a/drivers/soc/qcom/qcom_aoss.c
+++ b/drivers/soc/qcom/qcom_aoss.c
@@ -551,7 +551,11 @@ struct qmp *qmp_get(struct device *dev)
 
 	qmp = platform_get_drvdata(pdev);
 
-	return qmp ? qmp : ERR_PTR(-EPROBE_DEFER);
+	if (!qmp) {
+		put_device(&pdev->dev);
+		return ERR_PTR(-EPROBE_DEFER);
+	}
+	return qmp;
 }
 EXPORT_SYMBOL(qmp_get);