From: Linus Walleij linus.walleij@linaro.org
[ Upstream commit bb52d3691db8cf24cea049235223f3599778f264 ]
The call to check if the calibration is all zeroes is doing it wrong: memchr_inv() returns NULL if the the calibration contains all zeroes, but the check is for != NULL.
Fix it up. It's probably not an urgent fix because the inner check for BIT(7) in data[13] will save us. But fix it.
Fixes: de8860b1ed47 ("iio: magnetometer: Add driver for Yamaha YAS530") Reported-by: Jakob Hauser jahau@rocketmail.com Cc: Andy Shevchenko andy.shevchenko@gmail.com Signed-off-by: Linus Walleij linus.walleij@linaro.org Link: https://lore.kernel.org/r/20220501195029.151852-1-linus.walleij@linaro.org Signed-off-by: Jonathan Cameron Jonathan.Cameron@huawei.com Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/iio/magnetometer/yamaha-yas530.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/iio/magnetometer/yamaha-yas530.c b/drivers/iio/magnetometer/yamaha-yas530.c index 9ff7b0e56cf6..b2bc637150bf 100644 --- a/drivers/iio/magnetometer/yamaha-yas530.c +++ b/drivers/iio/magnetometer/yamaha-yas530.c @@ -639,7 +639,7 @@ static int yas532_get_calibration_data(struct yas5xx *yas5xx) dev_dbg(yas5xx->dev, "calibration data: %*ph\n", 14, data);
/* Sanity check, is this all zeroes? */ - if (memchr_inv(data, 0x00, 13)) { + if (memchr_inv(data, 0x00, 13) == NULL) { if (!(data[13] & BIT(7))) dev_warn(yas5xx->dev, "calibration is blank!\n"); }