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06de2cd788
An spi or i2c remove callback is only called for devices that probed successfully. In this case this implies that __max730x_probe() set a non-NULL driver data. So the check ts == NULL is never true. With this check dropped, __max730x_remove() returns zero unconditionally. Make it return void instead which makes it easier to see in the callers that there is no error to handle. Also the return value of i2c and spi remove callbacks is ignored anyway. Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Signed-off-by: Bartosz Golaszewski <brgl@bgdev.pl>
87 lines
1.8 KiB
C
87 lines
1.8 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Copyright (C) 2009 Wolfram Sang, Pengutronix
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*
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* Check max730x.c for further details.
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*/
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/platform_device.h>
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#include <linux/mutex.h>
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#include <linux/i2c.h>
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#include <linux/spi/max7301.h>
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#include <linux/slab.h>
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static int max7300_i2c_write(struct device *dev, unsigned int reg,
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unsigned int val)
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{
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struct i2c_client *client = to_i2c_client(dev);
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return i2c_smbus_write_byte_data(client, reg, val);
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}
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static int max7300_i2c_read(struct device *dev, unsigned int reg)
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{
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struct i2c_client *client = to_i2c_client(dev);
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return i2c_smbus_read_byte_data(client, reg);
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}
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static int max7300_probe(struct i2c_client *client,
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const struct i2c_device_id *id)
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{
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struct max7301 *ts;
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if (!i2c_check_functionality(client->adapter,
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I2C_FUNC_SMBUS_BYTE_DATA))
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return -EIO;
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ts = devm_kzalloc(&client->dev, sizeof(struct max7301), GFP_KERNEL);
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if (!ts)
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return -ENOMEM;
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ts->read = max7300_i2c_read;
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ts->write = max7300_i2c_write;
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ts->dev = &client->dev;
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return __max730x_probe(ts);
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}
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static int max7300_remove(struct i2c_client *client)
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{
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__max730x_remove(&client->dev);
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return 0;
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}
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static const struct i2c_device_id max7300_id[] = {
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{ "max7300", 0 },
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{ }
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};
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MODULE_DEVICE_TABLE(i2c, max7300_id);
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static struct i2c_driver max7300_driver = {
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.driver = {
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.name = "max7300",
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},
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.probe = max7300_probe,
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.remove = max7300_remove,
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.id_table = max7300_id,
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};
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static int __init max7300_init(void)
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{
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return i2c_add_driver(&max7300_driver);
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}
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subsys_initcall(max7300_init);
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static void __exit max7300_exit(void)
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{
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i2c_del_driver(&max7300_driver);
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}
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module_exit(max7300_exit);
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MODULE_AUTHOR("Wolfram Sang");
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MODULE_LICENSE("GPL v2");
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MODULE_DESCRIPTION("MAX7300 GPIO-Expander");
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