diff options
| author | Brian Masney <masneyb@onstation.org> | 2016-10-28 06:00:13 -0400 |
|---|---|---|
| committer | Jonathan Cameron <jic23@kernel.org> | 2016-11-01 18:50:04 +0000 |
| commit | 9d5f36d2419e488dfa6ba38e4cfc1e90f65a4cff (patch) | |
| tree | e5d9f37b32e36904fde581d18b052e380fc5a86f | |
| parent | a3b6b4b63beda16f3e91fdd942bbaaaf6b1f8b25 (diff) | |
staging: iio: tsl2583: check for error code from i2c_smbus_read_byte()
taos_i2c_read() and taos_als_calibrate() does not check to see if the
value returned by i2c_smbus_read_byte() was an error code. This patch
adds the appropriate error handling.
Signed-off-by: Brian Masney <masneyb@onstation.org>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
| -rw-r--r-- | drivers/staging/iio/light/tsl2583.c | 22 |
1 files changed, 21 insertions, 1 deletions
diff --git a/drivers/staging/iio/light/tsl2583.c b/drivers/staging/iio/light/tsl2583.c index fd4b6efd3016..35c1696a71c5 100644 --- a/drivers/staging/iio/light/tsl2583.c +++ b/drivers/staging/iio/light/tsl2583.c @@ -171,7 +171,14 @@ taos_i2c_read(struct i2c_client *client, u8 reg, u8 *val, unsigned int len) return ret; } /* read the data */ - *val = i2c_smbus_read_byte(client); + ret = i2c_smbus_read_byte(client); + if (ret < 0) { + dev_err(&client->dev, + "%s failed to read byte after writing to register %x\n", + __func__, reg); + return ret; + } + *val = ret; val++; reg++; } @@ -355,6 +362,13 @@ static int taos_als_calibrate(struct iio_dev *indio_dev) } reg_val = i2c_smbus_read_byte(chip->client); + if (reg_val < 0) { + dev_err(&chip->client->dev, + "%s failed to read after writing to the CNTRL register\n", + __func__); + return ret; + } + if ((reg_val & (TSL258X_CNTL_ADC_ENBL | TSL258X_CNTL_PWR_ON)) != (TSL258X_CNTL_ADC_ENBL | TSL258X_CNTL_PWR_ON)) { dev_err(&chip->client->dev, @@ -371,6 +385,12 @@ static int taos_als_calibrate(struct iio_dev *indio_dev) return ret; } reg_val = i2c_smbus_read_byte(chip->client); + if (reg_val < 0) { + dev_err(&chip->client->dev, + "%s failed to read after writing to the STATUS register\n", + __func__); + return ret; + } if ((reg_val & TSL258X_STA_ADC_VALID) != TSL258X_STA_ADC_VALID) { dev_err(&chip->client->dev, |