linux-kernel - [PATCH v2 5/5] ASoC: codecs: lpass-wsa-macro: Simplify with cleanup.h

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Date: Fri, 28 Jun 2024 12:10:59 +0200
From: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To: Srinivas Kandagatla <srinivas.kandagatla@...aro.org>, 
 Banajit Goswami <bgoswami@...cinc.com>, Liam Girdwood <lgirdwood@...il.com>, 
 Mark Brown <broonie@...nel.org>, Jaroslav Kysela <perex@...ex.cz>, 
 Takashi Iwai <tiwai@...e.com>
Cc: alsa-devel@...a-project.org, linux-arm-msm@...r.kernel.org, 
 linux-sound@...r.kernel.org, linux-kernel@...r.kernel.org, 
 Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
Subject: [PATCH v2 5/5] ASoC: codecs: lpass-wsa-macro: Simplify with
 cleanup.h

Driver's probe() has two allocations which are needed only within the
probe() itself - for devm_regmap_init_mmio().

Usage of devm interface is a bit misleading here, because these can be
freed right after each scope finishes.

This makes the code a bit more obvious and self documenting.

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>

---

Changes in v2:
1. New patch
---
 sound/soc/codecs/lpass-wsa-macro.c | 22 ++++++++++------------
 1 file changed, 10 insertions(+), 12 deletions(-)

diff --git a/sound/soc/codecs/lpass-wsa-macro.c b/sound/soc/codecs/lpass-wsa-macro.c
index b4e7139bac61..73a588289408 100644
--- a/sound/soc/codecs/lpass-wsa-macro.c
+++ b/sound/soc/codecs/lpass-wsa-macro.c
@@ -1,6 +1,7 @@
 // SPDX-License-Identifier: GPL-2.0-only
 // Copyright (c) 2018-2020, The Linux Foundation. All rights reserved.
 
+#include <linux/cleanup.h>
 #include <linux/module.h>
 #include <linux/init.h>
 #include <linux/io.h>
@@ -2725,8 +2726,6 @@ static const struct snd_soc_component_driver wsa_macro_component_drv = {
 static int wsa_macro_probe(struct platform_device *pdev)
 {
 	struct device *dev = &pdev->dev;
-	struct reg_default *reg_defaults;
-	struct regmap_config *reg_config;
 	struct wsa_macro *wsa;
 	kernel_ulong_t flags;
 	void __iomem *base;
@@ -2765,6 +2764,8 @@ static int wsa_macro_probe(struct platform_device *pdev)
 		return PTR_ERR(base);
 
 	wsa->codec_version = lpass_macro_get_codec_version();
+	struct reg_default *reg_defaults __free(kfree) = NULL;
+
 	switch (wsa->codec_version) {
 	case LPASS_CODEC_VERSION_1_0:
 	case LPASS_CODEC_VERSION_1_1:
@@ -2773,9 +2774,8 @@ static int wsa_macro_probe(struct platform_device *pdev)
 	case LPASS_CODEC_VERSION_2_1:
 		wsa->reg_layout = &wsa_codec_v2_1;
 		def_count = ARRAY_SIZE(wsa_defaults) + ARRAY_SIZE(wsa_defaults_v2_1);
-		reg_defaults = devm_kmalloc_array(dev, def_count,
-						  sizeof(*reg_defaults),
-						  GFP_KERNEL);
+		reg_defaults = kmalloc_array(def_count, sizeof(*reg_defaults),
+					     GFP_KERNEL);
 		if (!reg_defaults)
 			return -ENOMEM;
 		memcpy(&reg_defaults[0], wsa_defaults, sizeof(wsa_defaults));
@@ -2789,9 +2789,8 @@ static int wsa_macro_probe(struct platform_device *pdev)
 	case LPASS_CODEC_VERSION_2_8:
 		wsa->reg_layout = &wsa_codec_v2_5;
 		def_count = ARRAY_SIZE(wsa_defaults) + ARRAY_SIZE(wsa_defaults_v2_5);
-		reg_defaults = devm_kmalloc_array(dev, def_count,
-						  sizeof(*reg_defaults),
-						  GFP_KERNEL);
+		reg_defaults = kmalloc_array(def_count, sizeof(*reg_defaults),
+					     GFP_KERNEL);
 		if (!reg_defaults)
 			return -ENOMEM;
 		memcpy(&reg_defaults[0], wsa_defaults, sizeof(wsa_defaults));
@@ -2804,8 +2803,9 @@ static int wsa_macro_probe(struct platform_device *pdev)
 		return -EINVAL;
 	}
 
-	reg_config = devm_kmemdup(dev, &wsa_regmap_config,
-				  sizeof(*reg_config), GFP_KERNEL);
+	struct regmap_config *reg_config __free(kfree) = kmemdup(&wsa_regmap_config,
+								 sizeof(*reg_config),
+								 GFP_KERNEL);
 	if (!reg_config)
 		return -ENOMEM;
 
@@ -2816,8 +2816,6 @@ static int wsa_macro_probe(struct platform_device *pdev)
 	if (IS_ERR(wsa->regmap))
 		return PTR_ERR(wsa->regmap);
 
-	devm_kfree(dev, reg_config);
-	devm_kfree(dev, reg_defaults);
 	dev_set_drvdata(dev, wsa);
 
 	wsa->dev = dev;

-- 
2.43.0