linux-kernel - [PATCH 7/8] Input: qt2160 - convert to use devm

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Message-Id: <20230714080611.81302-7-frank.li@vivo.com>
Date:   Fri, 14 Jul 2023 16:06:10 +0800
From:   Yangtao Li <frank.li@...o.com>
To:     Dmitry Torokhov <dmitry.torokhov@...il.com>
Cc:     Yangtao Li <frank.li@...o.com>, linux-input@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH 7/8] Input: qt2160 - convert to use devm_* api

Use devm_* api to simplify code, this makes it unnecessary to explicitly
release resources.

Signed-off-by: Yangtao Li <frank.li@...o.com>
---
 drivers/input/keyboard/qt2160.c | 30 +++++++++++-------------------
 1 file changed, 11 insertions(+), 19 deletions(-)

diff --git a/drivers/input/keyboard/qt2160.c b/drivers/input/keyboard/qt2160.c
index 599ea85cfd30..218ef92b8c2b 100644
--- a/drivers/input/keyboard/qt2160.c
+++ b/drivers/input/keyboard/qt2160.c
@@ -340,6 +340,7 @@ static bool qt2160_identify(struct i2c_client *client)
 
 static int qt2160_probe(struct i2c_client *client)
 {
+	struct device *dev = &client->dev;
 	struct qt2160_data *qt2160;
 	struct input_dev *input;
 	int i;
@@ -358,12 +359,11 @@ static int qt2160_probe(struct i2c_client *client)
 		return -ENODEV;
 
 	/* Chip is valid and active. Allocate structure */
-	qt2160 = kzalloc(sizeof(struct qt2160_data), GFP_KERNEL);
-	input = input_allocate_device();
+	qt2160 = devm_kzalloc(dev, sizeof(struct qt2160_data), GFP_KERNEL);
+	input = devm_input_allocate_device(dev);
 	if (!qt2160 || !input) {
 		dev_err(&client->dev, "insufficient memory\n");
-		error = -ENOMEM;
-		goto err_free_mem;
+		return -ENOMEM;
 	}
 
 	qt2160->client = client;
@@ -389,23 +389,23 @@ static int qt2160_probe(struct i2c_client *client)
 	error = qt2160_write(client, QT2160_CMD_CALIBRATE, 1);
 	if (error) {
 		dev_err(&client->dev, "failed to calibrate device\n");
-		goto err_free_mem;
+		return error;
 	}
 
 	if (client->irq) {
-		error = request_irq(client->irq, qt2160_irq,
-				    IRQF_TRIGGER_FALLING, "qt2160", qt2160);
+		error = devm_request_irq(dev, client->irq, qt2160_irq,
+					 IRQF_TRIGGER_FALLING, "qt2160", qt2160);
 		if (error) {
 			dev_err(&client->dev,
 				"failed to allocate irq %d\n", client->irq);
-			goto err_free_mem;
+			return error;
 		}
 	}
 
 	error = qt2160_register_leds(qt2160);
 	if (error) {
 		dev_err(&client->dev, "Failed to register leds\n");
-		goto err_free_irq;
+		return error;
 	}
 
 	error = input_register_device(qt2160->input);
@@ -422,29 +422,21 @@ static int qt2160_probe(struct i2c_client *client)
 
 err_unregister_leds:
 	qt2160_unregister_leds(qt2160);
-err_free_irq:
-	if (client->irq)
-		free_irq(client->irq, qt2160);
-err_free_mem:
-	input_free_device(input);
-	kfree(qt2160);
 	return error;
 }
 
 static void qt2160_remove(struct i2c_client *client)
 {
 	struct qt2160_data *qt2160 = i2c_get_clientdata(client);
+	struct device *dev = &client->dev;
 
 	qt2160_unregister_leds(qt2160);
 
 	/* Release IRQ so no queue will be scheduled */
 	if (client->irq)
-		free_irq(client->irq, qt2160);
+		devm_free_irq(dev, client->irq, qt2160);
 
 	cancel_delayed_work_sync(&qt2160->dwork);
-
-	input_unregister_device(qt2160->input);
-	kfree(qt2160);
 }
 
 static const struct i2c_device_id qt2160_idtable[] = {
-- 
2.39.0