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Subject[PATCH v2 2/4] si470x-i2c: Use managed resource helpers
Date
Simplify cleanup of failures by using managed resource helpers

Signed-off-by: Paweł Chmiel <pawel.mikolaj.chmiel@gmail.com>
---
drivers/media/radio/si470x/radio-si470x-i2c.c | 29 +++++++------------
1 file changed, 11 insertions(+), 18 deletions(-)

diff --git a/drivers/media/radio/si470x/radio-si470x-i2c.c b/drivers/media/radio/si470x/radio-si470x-i2c.c
index 250828ddb5fa..a7ac09c55188 100644
--- a/drivers/media/radio/si470x/radio-si470x-i2c.c
+++ b/drivers/media/radio/si470x/radio-si470x-i2c.c
@@ -350,7 +350,7 @@ static int si470x_i2c_probe(struct i2c_client *client,
unsigned char version_warning = 0;

/* private data allocation and initialization */
- radio = kzalloc(sizeof(struct si470x_device), GFP_KERNEL);
+ radio = devm_kzalloc(&client->dev, sizeof(*radio), GFP_KERNEL);
if (!radio) {
retval = -ENOMEM;
goto err_initial;
@@ -370,7 +370,7 @@ static int si470x_i2c_probe(struct i2c_client *client,
retval = v4l2_device_register(&client->dev, &radio->v4l2_dev);
if (retval < 0) {
dev_err(&client->dev, "couldn't register v4l2_device\n");
- goto err_radio;
+ goto err_initial;
}

v4l2_ctrl_handler_init(&radio->hdl, 2);
@@ -396,14 +396,14 @@ static int si470x_i2c_probe(struct i2c_client *client,
radio->registers[POWERCFG] = POWERCFG_ENABLE;
if (si470x_set_register(radio, POWERCFG) < 0) {
retval = -EIO;
- goto err_ctrl;
+ goto err_all;
}
msleep(110);

/* get device and chip versions */
if (si470x_get_all_registers(radio) < 0) {
retval = -EIO;
- goto err_ctrl;
+ goto err_all;
}
dev_info(&client->dev, "DeviceID=0x%4.4hx ChipID=0x%4.4hx\n",
radio->registers[DEVICEID], radio->registers[SI_CHIPID]);
@@ -430,10 +430,10 @@ static int si470x_i2c_probe(struct i2c_client *client,

/* rds buffer allocation */
radio->buf_size = rds_buf * 3;
- radio->buffer = kmalloc(radio->buf_size, GFP_KERNEL);
+ radio->buffer = devm_kmalloc(&client->dev, radio->buf_size, GFP_KERNEL);
if (!radio->buffer) {
retval = -EIO;
- goto err_ctrl;
+ goto err_all;
}

/* rds buffer configuration */
@@ -441,12 +441,13 @@ static int si470x_i2c_probe(struct i2c_client *client,
radio->rd_index = 0;
init_waitqueue_head(&radio->read_queue);

- retval = request_threaded_irq(client->irq, NULL, si470x_i2c_interrupt,
- IRQF_TRIGGER_FALLING | IRQF_ONESHOT, DRIVER_NAME,
- radio);
+ retval = devm_request_threaded_irq(&client->dev, client->irq, NULL,
+ si470x_i2c_interrupt,
+ IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
+ DRIVER_NAME, radio);
if (retval) {
dev_err(&client->dev, "Failed to register interrupt\n");
- goto err_rds;
+ goto err_all;
}

/* register video device */
@@ -460,15 +461,9 @@ static int si470x_i2c_probe(struct i2c_client *client,

return 0;
err_all:
- free_irq(client->irq, radio);
-err_rds:
- kfree(radio->buffer);
-err_ctrl:
v4l2_ctrl_handler_free(&radio->hdl);
err_dev:
v4l2_device_unregister(&radio->v4l2_dev);
-err_radio:
- kfree(radio);
err_initial:
return retval;
}
@@ -481,9 +476,7 @@ static int si470x_i2c_remove(struct i2c_client *client)
{
struct si470x_device *radio = i2c_get_clientdata(client);

- free_irq(client->irq, radio);
video_unregister_device(&radio->videodev);
- kfree(radio);

return 0;
}
--
2.17.1
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