[PATCH v2 1/3] remoteproc: da8xx: Use devm_rproc_alloc() helper

[PATCH v2 1/3] remoteproc: da8xx: Use devm_rproc_alloc() helper

[Andrew Davis]

Use the device lifecycle managed allocation function. This helps prevent
mistakes like freeing out of order in cleanup functions and forgetting to
free on error paths.

Signed-off-by: Andrew Davis <afd@ti.com>
---
 drivers/remoteproc/da8xx_remoteproc.c | 15 ++++++---------
 1 file changed, 6 insertions(+), 9 deletions(-)

diff --git a/drivers/remoteproc/da8xx_remoteproc.c b/drivers/remoteproc/da8xx_remoteproc.c
index 93031f0867d10..47df21bea5254 100644
--- a/drivers/remoteproc/da8xx_remoteproc.c
+++ b/drivers/remoteproc/da8xx_remoteproc.c
@@ -276,8 +276,8 @@ static int da8xx_rproc_probe(struct platform_device *pdev)
 			return dev_err_probe(dev, ret, "device does not have specific CMA pool\n");
 	}
 
-	rproc = rproc_alloc(dev, "dsp", &da8xx_rproc_ops, da8xx_fw_name,
-		sizeof(*drproc));
+	rproc = devm_rproc_alloc(dev, "dsp", &da8xx_rproc_ops, da8xx_fw_name,
+				 sizeof(*drproc));
 	if (!rproc) {
 		ret = -ENOMEM;
 		goto free_mem;
@@ -294,7 +294,7 @@ static int da8xx_rproc_probe(struct platform_device *pdev)
 
 	ret = da8xx_rproc_get_internal_memories(pdev, drproc);
 	if (ret)
-		goto free_rproc;
+		goto free_mem;
 
 	platform_set_drvdata(pdev, rproc);
 
@@ -304,7 +304,7 @@ static int da8xx_rproc_probe(struct platform_device *pdev)
 					rproc);
 	if (ret) {
 		dev_err(dev, "devm_request_threaded_irq error: %d\n", ret);
-		goto free_rproc;
+		goto free_mem;
 	}
 
 	/*
@@ -314,7 +314,7 @@ static int da8xx_rproc_probe(struct platform_device *pdev)
 	 */
 	ret = reset_control_assert(dsp_reset);
 	if (ret)
-		goto free_rproc;
+		goto free_mem;
 
 	drproc->chipsig = chipsig;
 	drproc->bootreg = bootreg;
@@ -325,13 +325,11 @@ static int da8xx_rproc_probe(struct platform_device *pdev)
 	ret = rproc_add(rproc);
 	if (ret) {
 		dev_err(dev, "rproc_add failed: %d\n", ret);
-		goto free_rproc;
+		goto free_mem;
 	}
 
 	return 0;
 
-free_rproc:
-	rproc_free(rproc);
 free_mem:
 	if (dev->of_node)
 		of_reserved_mem_device_release(dev);
@@ -352,7 +350,6 @@ static void da8xx_rproc_remove(struct platform_device *pdev)
 	disable_irq(drproc->irq);
 
 	rproc_del(rproc);
-	rproc_free(rproc);
 	if (dev->of_node)
 		of_reserved_mem_device_release(dev);
 }
-- 
2.39.2

[PATCH v2 2/3] remoteproc: da8xx: Use devm action to release reserved memory

[Andrew Davis]

This helps prevent mistakes like freeing out of order in cleanup functions
and forgetting to free on error paths.

Signed-off-by: Andrew Davis <afd@ti.com>
---

Changes for v2:
 - Fix unused var "dev" warning

 drivers/remoteproc/da8xx_remoteproc.c | 30 +++++++++++++--------------
 1 file changed, 14 insertions(+), 16 deletions(-)

diff --git a/drivers/remoteproc/da8xx_remoteproc.c b/drivers/remoteproc/da8xx_remoteproc.c
index 47df21bea5254..58b4f05283d92 100644
--- a/drivers/remoteproc/da8xx_remoteproc.c
+++ b/drivers/remoteproc/da8xx_remoteproc.c
@@ -233,6 +233,13 @@ static int da8xx_rproc_get_internal_memories(struct platform_device *pdev,
 	return 0;
 }
 
+static void da8xx_rproc_mem_release(void *data)
+{
+	struct device *dev = data;
+
+	of_reserved_mem_device_release(dev);
+}
+
 static int da8xx_rproc_probe(struct platform_device *pdev)
 {
 	struct device *dev = &pdev->dev;
@@ -274,14 +281,13 @@ static int da8xx_rproc_probe(struct platform_device *pdev)
 		ret = of_reserved_mem_device_init(dev);
 		if (ret)
 			return dev_err_probe(dev, ret, "device does not have specific CMA pool\n");
+		devm_add_action_or_reset(&pdev->dev, da8xx_rproc_mem_release, &pdev->dev);
 	}
 
 	rproc = devm_rproc_alloc(dev, "dsp", &da8xx_rproc_ops, da8xx_fw_name,
 				 sizeof(*drproc));
-	if (!rproc) {
-		ret = -ENOMEM;
-		goto free_mem;
-	}
+	if (!rproc)
+		return -ENOMEM;
 
 	/* error recovery is not supported at present */
 	rproc->recovery_disabled = true;
@@ -294,7 +300,7 @@ static int da8xx_rproc_probe(struct platform_device *pdev)
 
 	ret = da8xx_rproc_get_internal_memories(pdev, drproc);
 	if (ret)
-		goto free_mem;
+		return ret;
 
 	platform_set_drvdata(pdev, rproc);
 
@@ -304,7 +310,7 @@ static int da8xx_rproc_probe(struct platform_device *pdev)
 					rproc);
 	if (ret) {
 		dev_err(dev, "devm_request_threaded_irq error: %d\n", ret);
-		goto free_mem;
+		return ret;
 	}
 
 	/*
@@ -314,7 +320,7 @@ static int da8xx_rproc_probe(struct platform_device *pdev)
 	 */
 	ret = reset_control_assert(dsp_reset);
 	if (ret)
-		goto free_mem;
+		return ret;
 
 	drproc->chipsig = chipsig;
 	drproc->bootreg = bootreg;
@@ -325,22 +331,16 @@ static int da8xx_rproc_probe(struct platform_device *pdev)
 	ret = rproc_add(rproc);
 	if (ret) {
 		dev_err(dev, "rproc_add failed: %d\n", ret);
-		goto free_mem;
+		return ret;
 	}
 
 	return 0;
-
-free_mem:
-	if (dev->of_node)
-		of_reserved_mem_device_release(dev);
-	return ret;
 }
 
 static void da8xx_rproc_remove(struct platform_device *pdev)
 {
 	struct rproc *rproc = platform_get_drvdata(pdev);
 	struct da8xx_rproc *drproc = rproc->priv;
-	struct device *dev = &pdev->dev;
 
 	/*
 	 * The devm subsystem might end up releasing things before
@@ -350,8 +350,6 @@ static void da8xx_rproc_remove(struct platform_device *pdev)
 	disable_irq(drproc->irq);
 
 	rproc_del(rproc);
-	if (dev->of_node)
-		of_reserved_mem_device_release(dev);
 }
 
 static const struct of_device_id davinci_rproc_of_match[] __maybe_unused = {
-- 
2.39.2

[PATCH v2 3/3] remoteproc: da8xx: Use devm_rproc_add() helper

[Andrew Davis]

Use the device lifecycle managed add function. This helps prevent mistakes
like deleting out of order in cleanup functions and forgetting to delete
on error paths.

Signed-off-by: Andrew Davis <afd@ti.com>
---
 drivers/remoteproc/da8xx_remoteproc.c | 20 +-------------------
 1 file changed, 1 insertion(+), 19 deletions(-)

diff --git a/drivers/remoteproc/da8xx_remoteproc.c b/drivers/remoteproc/da8xx_remoteproc.c
index 58b4f05283d92..e418a2bf5d2ee 100644
--- a/drivers/remoteproc/da8xx_remoteproc.c
+++ b/drivers/remoteproc/da8xx_remoteproc.c
@@ -302,8 +302,6 @@ static int da8xx_rproc_probe(struct platform_device *pdev)
 	if (ret)
 		return ret;
 
-	platform_set_drvdata(pdev, rproc);
-
 	/* everything the ISR needs is now setup, so hook it up */
 	ret = devm_request_threaded_irq(dev, irq, da8xx_rproc_callback,
 					handle_event, 0, "da8xx-remoteproc",
@@ -328,7 +326,7 @@ static int da8xx_rproc_probe(struct platform_device *pdev)
 	drproc->irq_data = irq_data;
 	drproc->irq = irq;
 
-	ret = rproc_add(rproc);
+	ret = devm_rproc_add(dev, rproc);
 	if (ret) {
 		dev_err(dev, "rproc_add failed: %d\n", ret);
 		return ret;
@@ -337,21 +335,6 @@ static int da8xx_rproc_probe(struct platform_device *pdev)
 	return 0;
 }
 
-static void da8xx_rproc_remove(struct platform_device *pdev)
-{
-	struct rproc *rproc = platform_get_drvdata(pdev);
-	struct da8xx_rproc *drproc = rproc->priv;
-
-	/*
-	 * The devm subsystem might end up releasing things before
-	 * freeing the irq, thus allowing an interrupt to sneak in while
-	 * the device is being removed.  This should prevent that.
-	 */
-	disable_irq(drproc->irq);
-
-	rproc_del(rproc);
-}
-
 static const struct of_device_id davinci_rproc_of_match[] __maybe_unused = {
 	{ .compatible = "ti,da850-dsp", },
 	{ /* sentinel */ },
@@ -360,7 +343,6 @@ MODULE_DEVICE_TABLE(of, davinci_rproc_of_match);
 
 static struct platform_driver da8xx_rproc_driver = {
 	.probe = da8xx_rproc_probe,
-	.remove = da8xx_rproc_remove,
 	.driver = {
 		.name = "davinci-rproc",
 		.of_match_table = of_match_ptr(davinci_rproc_of_match),
-- 
2.39.2