[PATCH 1/7] ASoC: qcom: Use devm for resource management

[Stephan Gerhold]

Simplify the machine drivers for newer SoCs a bit by using the
devm_* function calls that automatically release the resources
when the driver is removed or when probing fails.

Cc: Srinivas Kandagatla <srinivas.kandagatla at linaro.org>
Signed-off-by: Stephan Gerhold <stephan at gerhold.net>
---
 sound/soc/qcom/apq8096.c | 28 +++-------------------------
 sound/soc/qcom/common.c  |  3 +--
 sound/soc/qcom/sdm845.c  | 40 ++++++----------------------------------
 3 files changed, 10 insertions(+), 61 deletions(-)

diff --git a/sound/soc/qcom/apq8096.c b/sound/soc/qcom/apq8096.c
index 287ad2aa27f3..134f5a81df7f 100644
--- a/sound/soc/qcom/apq8096.c
+++ b/sound/soc/qcom/apq8096.c
@@ -109,7 +109,7 @@ static int apq8096_platform_probe(struct platform_device *pdev)
 	struct device *dev = &pdev->dev;
 	int ret;
 
-	card = kzalloc(sizeof(*card), GFP_KERNEL);
+	card = devm_kzalloc(dev, sizeof(*card), GFP_KERNEL);
 	if (!card)
 		return -ENOMEM;
 
@@ -117,31 +117,10 @@ static int apq8096_platform_probe(struct platform_device *pdev)
 	dev_set_drvdata(dev, card);
 	ret = qcom_snd_parse_of(card);
 	if (ret)
-		goto err;
+		return ret;
 
 	apq8096_add_be_ops(card);
-	ret = snd_soc_register_card(card);
-	if (ret)
-		goto err_card_register;
-
-	return 0;
-
-err_card_register:
-	kfree(card->dai_link);
-err:
-	kfree(card);
-	return ret;
-}
-
-static int apq8096_platform_remove(struct platform_device *pdev)
-{
-	struct snd_soc_card *card = dev_get_drvdata(&pdev->dev);
-
-	snd_soc_unregister_card(card);
-	kfree(card->dai_link);
-	kfree(card);
-
-	return 0;
+	return devm_snd_soc_register_card(dev, card);
 }
 
 static const struct of_device_id msm_snd_apq8096_dt_match[] = {
@@ -153,7 +132,6 @@ MODULE_DEVICE_TABLE(of, msm_snd_apq8096_dt_match);
 
 static struct platform_driver msm_snd_apq8096_driver = {
 	.probe  = apq8096_platform_probe,
-	.remove = apq8096_platform_remove,
 	.driver = {
 		.name = "msm-snd-apq8096",
 		.of_match_table = msm_snd_apq8096_dt_match,
diff --git a/sound/soc/qcom/common.c b/sound/soc/qcom/common.c
index 8ada4ecba847..d677e83828af 100644
--- a/sound/soc/qcom/common.c
+++ b/sound/soc/qcom/common.c
@@ -36,7 +36,7 @@ int qcom_snd_parse_of(struct snd_soc_card *card)
 	num_links = of_get_child_count(dev->of_node);
 
 	/* Allocate the DAI link array */
-	card->dai_link = kcalloc(num_links, sizeof(*link), GFP_KERNEL);
+	card->dai_link = devm_kcalloc(dev, num_links, sizeof(*link), GFP_KERNEL);
 	if (!card->dai_link)
 		return -ENOMEM;
 
@@ -143,7 +143,6 @@ int qcom_snd_parse_of(struct snd_soc_card *card)
 	of_node_put(cpu);
 	of_node_put(codec);
 	of_node_put(platform);
-	kfree(card->dai_link);
 	return ret;
 }
 EXPORT_SYMBOL(qcom_snd_parse_of);
diff --git a/sound/soc/qcom/sdm845.c b/sound/soc/qcom/sdm845.c
index 68e9388ff46f..580acfaf38e7 100644
--- a/sound/soc/qcom/sdm845.c
+++ b/sound/soc/qcom/sdm845.c
@@ -543,16 +543,14 @@ static int sdm845_snd_platform_probe(struct platform_device *pdev)
 	struct device *dev = &pdev->dev;
 	int ret;
 
-	card = kzalloc(sizeof(*card), GFP_KERNEL);
+	card = devm_kzalloc(dev, sizeof(*card), GFP_KERNEL);
 	if (!card)
 		return -ENOMEM;
 
 	/* Allocate the private data */
-	data = kzalloc(sizeof(*data), GFP_KERNEL);
-	if (!data) {
-		ret = -ENOMEM;
-		goto data_alloc_fail;
-	}
+	data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL);
+	if (!data)
+		return -ENOMEM;
 
 	card->dapm_widgets = sdm845_snd_widgets;
 	card->num_dapm_widgets = ARRAY_SIZE(sdm845_snd_widgets);
@@ -560,38 +558,13 @@ static int sdm845_snd_platform_probe(struct platform_device *pdev)
 	dev_set_drvdata(dev, card);
 	ret = qcom_snd_parse_of(card);
 	if (ret)
-		goto parse_dt_fail;
+		return ret;
 
 	data->card = card;
 	snd_soc_card_set_drvdata(card, data);
 
 	sdm845_add_ops(card);
-	ret = snd_soc_register_card(card);
-	if (ret) {
-		dev_err(dev, "Sound card registration failed\n");
-		goto register_card_fail;
-	}
-	return ret;
-
-register_card_fail:
-	kfree(card->dai_link);
-parse_dt_fail:
-	kfree(data);
-data_alloc_fail:
-	kfree(card);
-	return ret;
-}
-
-static int sdm845_snd_platform_remove(struct platform_device *pdev)
-{
-	struct snd_soc_card *card = dev_get_drvdata(&pdev->dev);
-	struct sdm845_snd_data *data = snd_soc_card_get_drvdata(card);
-
-	snd_soc_unregister_card(card);
-	kfree(card->dai_link);
-	kfree(data);
-	kfree(card);
-	return 0;
+	return devm_snd_soc_register_card(dev, card);
 }
 
 static const struct of_device_id sdm845_snd_device_id[]  = {
@@ -604,7 +577,6 @@ MODULE_DEVICE_TABLE(of, sdm845_snd_device_id);
 
 static struct platform_driver sdm845_snd_driver = {
 	.probe = sdm845_snd_platform_probe,
-	.remove = sdm845_snd_platform_remove,
 	.driver = {
 		.name = "msm-snd-sdm845",
 		.of_match_table = sdm845_snd_device_id,
-- 
2.27.0