forked from Minki/linux
6b8471e460
Fixes ef89f4b96a ("iio: adxl345: Add support for the ADXL375").
This was found via static checker.
After looking into the code a bit, it's unlikely that there will be a NULL
dereference if the `id` object in that specific code path.
However, it's safe to add a NULL (paranoid) check just to make sure and
remove any uncertainties.
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Alexandru Ardelean <alexandru.ardelean@analog.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
80 lines
1.9 KiB
C
80 lines
1.9 KiB
C
/*
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* ADXL345 3-Axis Digital Accelerometer I2C driver
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*
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* Copyright (c) 2017 Eva Rachel Retuya <eraretuya@gmail.com>
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*
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* This file is subject to the terms and conditions of version 2 of
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* the GNU General Public License. See the file COPYING in the main
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* directory of this archive for more details.
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*
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* 7-bit I2C slave address: 0x1D (ALT ADDRESS pin tied to VDDIO) or
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* 0x53 (ALT ADDRESS pin grounded)
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*/
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#include <linux/i2c.h>
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#include <linux/module.h>
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#include <linux/regmap.h>
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#include "adxl345.h"
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static const struct regmap_config adxl345_i2c_regmap_config = {
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.reg_bits = 8,
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.val_bits = 8,
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};
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static int adxl345_i2c_probe(struct i2c_client *client,
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const struct i2c_device_id *id)
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{
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struct regmap *regmap;
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if (!id)
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return -ENODEV;
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regmap = devm_regmap_init_i2c(client, &adxl345_i2c_regmap_config);
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if (IS_ERR(regmap)) {
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dev_err(&client->dev, "Error initializing i2c regmap: %ld\n",
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PTR_ERR(regmap));
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return PTR_ERR(regmap);
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}
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return adxl345_core_probe(&client->dev, regmap, id->driver_data,
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id->name);
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}
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static int adxl345_i2c_remove(struct i2c_client *client)
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{
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return adxl345_core_remove(&client->dev);
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}
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static const struct i2c_device_id adxl345_i2c_id[] = {
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{ "adxl345", ADXL345 },
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{ "adxl375", ADXL375 },
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{ }
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};
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MODULE_DEVICE_TABLE(i2c, adxl345_i2c_id);
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static const struct of_device_id adxl345_of_match[] = {
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{ .compatible = "adi,adxl345" },
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{ .compatible = "adi,adxl375" },
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{ },
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};
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MODULE_DEVICE_TABLE(of, adxl345_of_match);
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static struct i2c_driver adxl345_i2c_driver = {
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.driver = {
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.name = "adxl345_i2c",
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.of_match_table = adxl345_of_match,
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},
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.probe = adxl345_i2c_probe,
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.remove = adxl345_i2c_remove,
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.id_table = adxl345_i2c_id,
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};
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module_i2c_driver(adxl345_i2c_driver);
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MODULE_AUTHOR("Eva Rachel Retuya <eraretuya@gmail.com>");
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MODULE_DESCRIPTION("ADXL345 3-Axis Digital Accelerometer I2C driver");
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MODULE_LICENSE("GPL v2");
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