linux-kernel - [PATCH 3/3] soc: ti: pm33xx: do device

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Date: Fri, 10 May 2024 12:43:24 +0530
From: Kousik Sanagavarapu <five231003@...il.com>
To: Nishanth Menon <nm@...com>,
	Santosh Shilimkar <ssantosh@...nel.org>,
	Julia Lawall <julia.lawall@...ia.fr>
Cc: Shuah Khan <skhan@...uxfoundation.org>,
	Javier Carrasco <javier.carrasco.cruz@...il.com>,
	linux-kernel@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	Kousik Sanagavarapu <five231003@...il.com>
Subject: [PATCH 3/3] soc: ti: pm33xx: do device_node auto cleanup

Use scope based cleanup instead of manual of_node_put() calls, hence
simplifying the handling of error paths.

Suggested-by: Julia Lawall <julia.lawall@...ia.fr>
Signed-off-by: Kousik Sanagavarapu <five231003@...il.com>
---
 drivers/soc/ti/pm33xx.c | 20 +++++++-------------
 1 file changed, 7 insertions(+), 13 deletions(-)

diff --git a/drivers/soc/ti/pm33xx.c b/drivers/soc/ti/pm33xx.c
index 8e983c3c4e03..40988c45ed00 100644
--- a/drivers/soc/ti/pm33xx.c
+++ b/drivers/soc/ti/pm33xx.c
@@ -383,10 +383,9 @@ static void am33xx_pm_free_sram(void)
  */
 static int am33xx_pm_alloc_sram(void)
 {
-	struct device_node *np;
-	int ret = 0;
+	struct device_node *np __free(device_node) =
+			of_find_compatible_node(NULL, NULL, "ti,omap3-mpu");
 
-	np = of_find_compatible_node(NULL, NULL, "ti,omap3-mpu");
 	if (!np) {
 		np = of_find_compatible_node(NULL, NULL, "ti,omap4-mpu");
 		if (!np) {
@@ -400,24 +399,21 @@ static int am33xx_pm_alloc_sram(void)
 	if (!sram_pool) {
 		dev_err(pm33xx_dev, "PM: %s: Unable to get sram pool for ocmcram\n",
 			__func__);
-		ret = -ENODEV;
-		goto mpu_put_node;
+		return -ENODEV;
 	}
 
 	sram_pool_data = of_gen_pool_get(np, "pm-sram", 1);
 	if (!sram_pool_data) {
 		dev_err(pm33xx_dev, "PM: %s: Unable to get sram data pool for ocmcram\n",
 			__func__);
-		ret = -ENODEV;
-		goto mpu_put_node;
+		return -ENODEV;
 	}
 
 	ocmcram_location = gen_pool_alloc(sram_pool, *pm_sram->do_wfi_sz);
 	if (!ocmcram_location) {
 		dev_err(pm33xx_dev, "PM: %s: Unable to allocate memory from ocmcram\n",
 			__func__);
-		ret = -ENOMEM;
-		goto mpu_put_node;
+		return -ENOMEM;
 	}
 
 	ocmcram_location_data = gen_pool_alloc(sram_pool_data,
@@ -425,12 +421,10 @@ static int am33xx_pm_alloc_sram(void)
 	if (!ocmcram_location_data) {
 		dev_err(pm33xx_dev, "PM: Unable to allocate memory from ocmcram\n");
 		gen_pool_free(sram_pool, ocmcram_location, *pm_sram->do_wfi_sz);
-		ret = -ENOMEM;
+		return -ENOMEM;
 	}
 
-mpu_put_node:
-	of_node_put(np);
-	return ret;
+	return 0;
 }
 
 static int am33xx_pm_rtc_setup(void)
-- 
2.45.0.rc1.8.ge326e52010