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hwmon: (ads7871) Fix ads7871_probe error paths 

1. remove 'status' variable
2. remove unneeded initialization of 'err' variable
3. return missing error code if sysfs_create_group fail.
4. fix the init sequence as:
   - check hardware existence
   - kzalloc for ads7871_data
   - sysfs_create_group
   - hwmon_device_register

Signed-off-by: Axel Lin <axel.lin@gmail.com>
Cc: stable@kernel.org
Signed-off-by: Jean Delvare <khali@linux-fr.org>
This commit is contained in:
Axel Lin 2010-08-25 15:42:10 +02:00 committed by Jean Delvare
parent 45ff34d32a
commit c12c507d71
1 changed files with 19 additions and 19 deletions
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38
drivers/hwmon/ads7871.c
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@ -160,30 +160,12 @@ static const struct attribute_group ads7871_group = {
static int __devinit ads7871_probe(struct spi_device *spi)
{
int status, ret, err = 0;
int ret, err;
uint8_t val;
struct ads7871_data *pdata;
dev_dbg(&spi->dev, "probe\n");
pdata = kzalloc(sizeof(struct ads7871_data), GFP_KERNEL);
if (!pdata) {
err = -ENOMEM;
goto exit;
}
status = sysfs_create_group(&spi->dev.kobj, &ads7871_group);
if (status < 0)
goto error_free;
pdata->hwmon_dev = hwmon_device_register(&spi->dev);
if (IS_ERR(pdata->hwmon_dev)) {
err = PTR_ERR(pdata->hwmon_dev);
goto error_remove;
}
spi_set_drvdata(spi, pdata);
/* Configure the SPI bus */
spi->mode = (SPI_MODE_0);
spi->bits_per_word = 8;
@ -201,6 +183,24 @@ static int __devinit ads7871_probe(struct spi_device *spi)
we need to make sure we really have a chip*/
if (val != ret) {
err = -ENODEV;
goto exit;
}
pdata = kzalloc(sizeof(struct ads7871_data), GFP_KERNEL);
if (!pdata) {
err = -ENOMEM;
goto exit;
}
err = sysfs_create_group(&spi->dev.kobj, &ads7871_group);
if (err < 0)
goto error_free;
spi_set_drvdata(spi, pdata);
pdata->hwmon_dev = hwmon_device_register(&spi->dev);
if (IS_ERR(pdata->hwmon_dev)) {
err = PTR_ERR(pdata->hwmon_dev);
goto error_remove;
}