[PATCH 03/42] firmware: qcom: scm: Use devm_of_reserved_mem_device_init()

[Mukesh Ojha]

Switch from of_reserved_mem_device_init() to the new resource managed
devm_of_reserved_mem_device_init() so that the reserved memory region
is released automatically on probe failure or device unbind. This
eliminates the err_rmem cleanup label and the need to call
of_reserved_mem_device_release() explicitly on error paths.

Signed-off-by: Mukesh Ojha <mukesh.ojha at oss.qualcomm.com>
---
 drivers/firmware/qcom/qcom_scm.c | 22 +++++++---------------
 1 file changed, 7 insertions(+), 15 deletions(-)

diff --git a/drivers/firmware/qcom/qcom_scm.c b/drivers/firmware/qcom/qcom_scm.c
index 26bf87247afa..0f9559b9cc53 100644
--- a/drivers/firmware/qcom/qcom_scm.c
+++ b/drivers/firmware/qcom/qcom_scm.c
@@ -2779,17 +2779,15 @@ static int qcom_scm_probe(struct platform_device *pdev)
 	if (ret)
 		return ret;
 
-	ret = of_reserved_mem_device_init(scm->dev);
+	ret = devm_of_reserved_mem_device_init(scm->dev);
 	if (ret && ret != -ENODEV)
 		return dev_err_probe(scm->dev, ret,
 				     "Failed to setup the reserved memory region for TZ mem\n");
 
 	ret = qcom_tzmem_enable(scm->dev);
-	if (ret) {
-		ret = dev_err_probe(scm->dev, ret,
-				    "Failed to enable the TrustZone memory allocator\n");
-		goto err_rmem;
-	}
+	if (ret)
+		return dev_err_probe(scm->dev, ret,
+				     "Failed to enable the TrustZone memory allocator\n");
 
 	memset(&pool_config, 0, sizeof(pool_config));
 	pool_config.initial_size = 0;
@@ -2797,11 +2795,9 @@ static int qcom_scm_probe(struct platform_device *pdev)
 	pool_config.max_size = SZ_256K;
 
 	scm->mempool = devm_qcom_tzmem_pool_new(scm->dev, &pool_config);
-	if (IS_ERR(scm->mempool)) {
-		ret = dev_err_probe(scm->dev, PTR_ERR(scm->mempool),
-				    "Failed to create the SCM memory pool\n");
-		goto err_rmem;
-	}
+	if (IS_ERR(scm->mempool))
+		return dev_err_probe(scm->dev, PTR_ERR(scm->mempool),
+				     "Failed to create the SCM memory pool\n");
 
 	ret = qcom_scm_query_waitq_count(scm);
 	scm->wq_cnt = ret < 0 ? QCOM_SCM_DEFAULT_WAITQ_COUNT : ret;
@@ -2872,10 +2868,6 @@ static int qcom_scm_probe(struct platform_device *pdev)
 	qcom_scm_gunyah_wdt_init(scm);
 
 	return 0;
-
-err_rmem:
-	of_reserved_mem_device_release(scm->dev);
-	return ret;
 }
 
 static void qcom_scm_shutdown(struct platform_device *pdev)
-- 
2.53.0