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@xxxxxxxxxxxxx>
---
drivers/staging/iio/light/tsl2583.c | 22 +++++++++++++++++++++-
1 file changed, 21 insertions(+), 1 deletion(-)
diff --git a/drivers/staging/iio/light/tsl2583.c b/drivers/staging/iio/light/tsl2583.c
index fd4b6ef..35c1696 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,
--
2.7.4
--
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