The current implementation returns the error code as part of the default switch case. This can lead to returning an incorrect positive value in case of iio_avail_type enum entries evolution.
In order to avoid this case, be more strict in error checking.
Signed-off-by: Herve Codina herve.codina@bootlin.com Acked-by: Jonathan Cameron Jonathan.Cameron@huawei.com Reviewed-by: Andy Shevchenko andy.shevchenko@gmail.com --- drivers/iio/inkern.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/drivers/iio/inkern.c b/drivers/iio/inkern.c index 872fd5c24147..f738db9a0c04 100644 --- a/drivers/iio/inkern.c +++ b/drivers/iio/inkern.c @@ -858,6 +858,9 @@ static int iio_channel_read_max(struct iio_channel *chan, val2 = &unused;
ret = iio_channel_read_avail(chan, &vals, type, &length, info); + if (ret < 0) + return ret; + switch (ret) { case IIO_AVAIL_RANGE: switch (*type) { @@ -888,7 +891,7 @@ static int iio_channel_read_max(struct iio_channel *chan, return 0;
default: - return ret; + return -EINVAL; } }