[PATCH v4 5/6] iio: light: stk3310: log error if reading the chip id fails

[Aren Moynihan]

If the chip isn't powered, this call is likely to return an error.
Without a log here the driver will silently fail to probe. Potential
errors include ENXIO (when the chip isn't powered) and ETIMEDOUT (when
the i2c bus isn't powered).

This function is only called from stk3310_probe, and this condition
should return an error, which fits what dev_err_probe is designed for.

Signed-off-by: Aren Moynihan <aren at peacevolution.org>
---

Notes:
    Changes in v4:
     - get a struct device ahead of time so it can be passed as "dev"
       instead of "&client->dev"
    
    Changes in v2:
     - use dev_err_probe

 drivers/iio/light/stk3310.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/iio/light/stk3310.c b/drivers/iio/light/stk3310.c
index c9a3f02bdd80..becd6901dfef 100644
--- a/drivers/iio/light/stk3310.c
+++ b/drivers/iio/light/stk3310.c
@@ -509,7 +509,7 @@ static int stk3310_init(struct iio_dev *indio_dev)
 
 	ret = regmap_read(data->regmap, STK3310_REG_ID, &chipid);
 	if (ret < 0)
-		return ret;
+		return dev_err_probe(dev, ret, "failed to read chip id\n");
 
 	ret = stk3310_check_chip_id(chipid);
 	if (ret < 0)
-- 
2.47.0