i2c_smbus_read_byte_data() returns an s32 type. We need to change "rate" to signed for the error handling to work. Also I changed it to propogate the error code instead of just returning -EINVAL. Other error codes could be -EAGAIN for example. Signed-off-by: Dan Carpenter <error27@xxxxxxxxx> diff --git a/drivers/staging/iio/magnetometer/hmc5843.c b/drivers/staging/iio/magnetometer/hmc5843.c index 92f6c6f..3d3bac4 100644 --- a/drivers/staging/iio/magnetometer/hmc5843.c +++ b/drivers/staging/iio/magnetometer/hmc5843.c @@ -385,11 +385,11 @@ static ssize_t show_sampling_frequency(struct device *dev, struct iio_dev *indio_dev = dev_get_drvdata(dev); struct i2c_client *client = to_i2c_client(indio_dev->dev.parent); struct iio_dev_attr *this_attr = to_iio_dev_attr(attr); - u32 rate; + s32 rate; rate = i2c_smbus_read_byte_data(client, this_attr->address); if (rate < 0) - return -EINVAL; + return rate; rate = (rate & RATE_BITMASK) >> RATE_OFFSET; return sprintf(buf, "%s\n", regval_to_samp_freq[rate]); } _______________________________________________ devel mailing list devel@xxxxxxxxxxxxxxxxxxxxxx http://driverdev.linuxdriverproject.org/mailman/listinfo/devel
