From: Colin Ian King <[email protected]> In the case that the read size is not 2 or 4 bytes then maxim_thermocouple_read is not initializing ret and hence may return early with a bogus error return or just through to return with a bogos unread value in *val. Fix this by setting ret to -EINVAL for invalid (unhandled) read sizes.
Signed-off-by: Colin Ian King <[email protected]> --- drivers/iio/temperature/maxim_thermocouple.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/iio/temperature/maxim_thermocouple.c b/drivers/iio/temperature/maxim_thermocouple.c index 066161a..f962f31 100644 --- a/drivers/iio/temperature/maxim_thermocouple.c +++ b/drivers/iio/temperature/maxim_thermocouple.c @@ -136,6 +136,8 @@ static int maxim_thermocouple_read(struct maxim_thermocouple_data *data, ret = spi_read(data->spi, (void *)&buf32, storage_bytes); *val = be32_to_cpu(buf32); break; + default: + ret = -EINVAL; } if (ret) -- 2.9.3
