linux-kernel - [PATCH v2 06/10] dmaengine: imx-sdma: make use of devm_kzalloc for script

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Message-Id: <20250911-v6-16-topic-sdma-v2-6-d315f56343b5@pengutronix.de>
Date: Thu, 11 Sep 2025 23:56:47 +0200
From: Marco Felsch <m.felsch@...gutronix.de>
To: Vinod Koul <vkoul@...nel.org>, Shawn Guo <shawnguo@...nel.org>, 
 Sascha Hauer <s.hauer@...gutronix.de>, 
 Pengutronix Kernel Team <kernel@...gutronix.de>, 
 Fabio Estevam <festevam@...il.com>, Jiada Wang <jiada_wang@...tor.com>
Cc: dmaengine@...r.kernel.org, imx@...ts.linux.dev, 
 linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org, 
 Marco Felsch <m.felsch@...gutronix.de>, Frank Li <Frank.Li@....com>
Subject: [PATCH v2 06/10] dmaengine: imx-sdma: make use of devm_kzalloc for
 script_addrs

Shuffle the allocation of script_addrs and make use of devm_kzalloc() to
drop the local error handling as well as the kfree() during the remove.

Reviewed-by: Frank Li <Frank.Li@....com>
Signed-off-by: Marco Felsch <m.felsch@...gutronix.de>
---
 drivers/dma/imx-sdma.c | 19 +++++++------------
 1 file changed, 7 insertions(+), 12 deletions(-)

diff --git a/drivers/dma/imx-sdma.c b/drivers/dma/imx-sdma.c
index b0def2bde77fe53b0805bddc0c5d6116c9cefcbe..d6239900ba12063bdb7d807db1bdbdc2b446a94c 100644
--- a/drivers/dma/imx-sdma.c
+++ b/drivers/dma/imx-sdma.c
@@ -2283,6 +2283,10 @@ static int sdma_probe(struct platform_device *pdev)
 	if (!sdma)
 		return -ENOMEM;
 
+	sdma->script_addrs = devm_kzalloc(dev, sizeof(*sdma->script_addrs), GFP_KERNEL);
+	if (!sdma->script_addrs)
+		return -ENOMEM;
+
 	spin_lock_init(&sdma->channel_0_lock);
 
 	sdma->dev = dev;
@@ -2319,12 +2323,6 @@ static int sdma_probe(struct platform_device *pdev)
 
 	sdma->irq = irq;
 
-	sdma->script_addrs = kzalloc(sizeof(*sdma->script_addrs), GFP_KERNEL);
-	if (!sdma->script_addrs) {
-		ret = -ENOMEM;
-		goto err_irq;
-	}
-
 	/* initially no scripts available */
 	saddr_arr = (s32 *)sdma->script_addrs;
 	for (i = 0; i < sizeof(*sdma->script_addrs) / sizeof(s32); i++)
@@ -2362,11 +2360,11 @@ static int sdma_probe(struct platform_device *pdev)
 
 	ret = sdma_init(sdma);
 	if (ret)
-		goto err_init;
+		goto err_irq;
 
 	ret = sdma_event_remap(sdma);
 	if (ret)
-		goto err_init;
+		goto err_irq;
 
 	if (sdma->drvdata->script_addrs)
 		sdma_add_scripts(sdma, sdma->drvdata->script_addrs);
@@ -2395,7 +2393,7 @@ static int sdma_probe(struct platform_device *pdev)
 	ret = dma_async_device_register(&sdma->dma_device);
 	if (ret) {
 		dev_err(dev, "unable to register\n");
-		goto err_init;
+		goto err_irq;
 	}
 
 	ret = of_dma_controller_register(np, sdma_xlate, sdma);
@@ -2423,8 +2421,6 @@ static int sdma_probe(struct platform_device *pdev)
 
 err_register:
 	dma_async_device_unregister(&sdma->dma_device);
-err_init:
-	kfree(sdma->script_addrs);
 err_irq:
 	clk_unprepare(sdma->clk_ahb);
 err_clk:
@@ -2440,7 +2436,6 @@ static void sdma_remove(struct platform_device *pdev)
 	of_dma_controller_free(sdma->dev->of_node);
 	devm_free_irq(&pdev->dev, sdma->irq, sdma);
 	dma_async_device_unregister(&sdma->dma_device);
-	kfree(sdma->script_addrs);
 	clk_unprepare(sdma->clk_ahb);
 	clk_unprepare(sdma->clk_ipg);
 	/* Kill the tasklet */

-- 
2.47.3