diff --git a/drivers/iio/magnetometer/ak8975.c b/drivers/iio/magnetometer/ak8975.c
index 0fb2fd03d11c..bb74abb648f1 100644
--- a/drivers/iio/magnetometer/ak8975.c
+++ b/drivers/iio/magnetometer/ak8975.c
@@ -499,6 +499,10 @@ static int ak8975_who_i_am(const struct ak8975_data *data,
 		dev_err(&client->dev, "Error reading WIA\n");
 		return ret;
 	}
+	if (ret != sizeof(wia_val)) {
+		dev_err(&client->dev, "Error reading WIA\n");
+		return -EIO;
+	}
 
 	if (wia_val[0] != AK8975_DEVICE_ID)
 		return -ENODEV;
@@ -620,6 +624,10 @@ static int ak8975_setup(struct ak8975_data *data)
 		dev_err(&client->dev, "Not able to read asa data\n");
 		return ret;
 	}
+	if (ret != sizeof(data->asa)) {
+		dev_err(&client->dev, "Error reading asa data\n");
+		return -EIO;
+	}
 
 	/* After reading fuse ROM data set power-down mode */
 	ret = ak8975_set_mode(data, POWER_DOWN);
@@ -755,6 +763,10 @@ static int ak8975_read_axis(struct iio_dev *indio_dev, int index, int *val)
 							(u8 *)&rval);
 	if (ret < 0)
 		goto exit;
+	if (ret != sizeof(rval)) {
+		ret = -EIO;
+		goto exit;
+	}
 
 	/* Read out ST2 for release lock on measurement data. */
 	ret = i2c_smbus_read_byte_data(client, data->def->ctrl_regs[ST2]);
@@ -871,6 +883,8 @@ static void ak8975_fill_buffer(struct iio_dev *indio_dev)
 							(u8 *)fval);
 	if (ret < 0)
 		goto unlock;
+	if (ret != sizeof(fval))
+		goto unlock;
 
 	mutex_unlock(&data->lock);