linux-kernel - [PATCH] soc: qcom: smem: fix hwspinlock resource leak in probe error paths

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Message-ID: <20251029022733.255-1-vulab@iscas.ac.cn>
Date: Wed, 29 Oct 2025 10:27:33 +0800
From: Haotian Zhang <vulab@...as.ac.cn>
To: andersson@...nel.org,
	konradybcio@...nel.org
Cc: linux-arm-msm@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Haotian Zhang <vulab@...as.ac.cn>
Subject: [PATCH] soc: qcom: smem: fix hwspinlock resource leak in probe error paths

The hwspinlock acquired via hwspin_lock_request_specific() is not
released on several error paths. This results in resource leakage
when probe fails.

Switch to devm_hwspin_lock_request_specific() to automatically
handle cleanup on probe failure. Remove the manual hwspin_lock_free()
in qcom_smem_remove() as devm handles it automatically.

Fixes: 20bb6c9de1b7 ("soc: qcom: smem: map only partitions used by local HOST")
Signed-off-by: Haotian Zhang <vulab@...as.ac.cn>
---
 drivers/soc/qcom/smem.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/soc/qcom/smem.c b/drivers/soc/qcom/smem.c
index cf425930539e..5d831b551c9a 100644
--- a/drivers/soc/qcom/smem.c
+++ b/drivers/soc/qcom/smem.c
@@ -1190,7 +1190,7 @@ static int qcom_smem_probe(struct platform_device *pdev)
 		return dev_err_probe(&pdev->dev, hwlock_id,
 				     "failed to retrieve hwlock\n");
 
-	smem->hwlock = hwspin_lock_request_specific(hwlock_id);
+	smem->hwlock = devm_hwspin_lock_request_specific(&pdev->dev, hwlock_id);
 	if (!smem->hwlock)
 		return -ENXIO;
 
@@ -1243,7 +1243,6 @@ static void qcom_smem_remove(struct platform_device *pdev)
 {
 	platform_device_unregister(__smem->socinfo);
 
-	hwspin_lock_free(__smem->hwlock);
 	__smem = NULL;
 }
 
-- 
2.50.1.windows.1