[PATCH v3 5/6] iio: magnetometer: ak8975: fix wrong errno on return

[Joshua Crofts <joshua.crofts1@gmail.com>]

The driver currently returns -EINVAL on polling timeout instead of
-ETIMEDOUT.

Replace return code for -ETIMEDOUT and remove unnecessary error message
as error is described enough by error code.

Suggested-by: Andy Shevchenko <andriy.shevchenko@intel.com>
Signed-off-by: Joshua Crofts <joshua.crofts1@gmail.com>
---
 drivers/iio/magnetometer/ak8975.c | 12 ++++--------
 1 file changed, 4 insertions(+), 8 deletions(-)

diff --git a/drivers/iio/magnetometer/ak8975.c b/drivers/iio/magnetometer/ak8975.c
index bceab47e5af..723c2f64b8e 100644
--- a/drivers/iio/magnetometer/ak8975.c
+++ b/drivers/iio/magnetometer/ak8975.c
@@ -662,10 +662,8 @@ static int wait_conversion_complete_gpio(struct ak8975_data *data)
 			break;
 		timeout_ms -= AK8975_CONVERSION_DONE_POLL_TIME;
 	}
-	if (!timeout_ms) {
-		dev_err(&client->dev, "Conversion timeout happened\n");
-		return -EINVAL;
-	}
+	if (!timeout_ms)
+		return -ETIMEDOUT;
 
 	ret = i2c_smbus_read_byte_data(client, data->def->ctrl_regs[ST1]);
 	if (ret < 0)
@@ -695,10 +693,8 @@ static int wait_conversion_complete_polled(struct ak8975_data *data)
 			break;
 		timeout_ms -= AK8975_CONVERSION_DONE_POLL_TIME;
 	}
-	if (!timeout_ms) {
-		dev_err(&client->dev, "Conversion timeout happened\n");
-		return -EINVAL;
-	}
+	if (!timeout_ms)
+		return -ETIMEDOUT;
 
 	return read_status;
 }
-- 
2.47.3