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misc: bh1780: Introduce the use of devm_kzalloc 

This patch introduces the use of devm_kzalloc and does away with the
kfrees in the probe and remove functions. A label and the kfree
being called on the return path of failure on i2c_check_functionality,
which is completely unnecessary and removed. The NULL assignment of
ddata is no longer required is also done away with.

Signed-off-by: Himangi Saraogi <himangi774@gmail.com>
Acked-by: Julia Lawall <julia.lawall@lip6.fr>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Himangi Saraogi 2014-07-24 02:45:40 +05:30 committed by Greg Kroah-Hartman
parent ee5311420d
commit 7b9d1f0b7a
1 changed files with 9 additions and 24 deletions
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33
drivers/misc/bh1780gli.c
View File

@ -149,50 +149,35 @@ static int bh1780_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
int ret;
struct bh1780_data *ddata = NULL;
struct bh1780_data *ddata;
struct i2c_adapter *adapter = to_i2c_adapter(client->dev.parent);
if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE)) {
ret = -EIO;
goto err_op_failed;
}
if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE))
return -EIO;
ddata = kzalloc(sizeof(struct bh1780_data), GFP_KERNEL);
if (ddata == NULL) {
ret = -ENOMEM;
goto err_op_failed;
}
ddata = devm_kzalloc(&client->dev, sizeof(struct bh1780_data),
GFP_KERNEL);
if (ddata == NULL)
return -ENOMEM;
ddata->client = client;
i2c_set_clientdata(client, ddata);
ret = bh1780_read(ddata, BH1780_REG_PARTID, "PART ID");
if (ret < 0)
goto err_op_failed;
return ret;
dev_info(&client->dev, "Ambient Light Sensor, Rev : %d\n",
(ret & BH1780_REVMASK));
mutex_init(&ddata->lock);
ret = sysfs_create_group(&client->dev.kobj, &bh1780_attr_group);
if (ret)
goto err_op_failed;
return 0;
err_op_failed:
kfree(ddata);
return ret;
return sysfs_create_group(&client->dev.kobj, &bh1780_attr_group);
}
static int bh1780_remove(struct i2c_client *client)
{
struct bh1780_data *ddata;
ddata = i2c_get_clientdata(client);
sysfs_remove_group(&client->dev.kobj, &bh1780_attr_group);
kfree(ddata);
return 0;
}