blob: ea2440009314c89a439ee0e6a97b78ef33cc49d7 [file] [log] [blame]
From 57141c9c7a1eeaaea44797e36f5154b211ecf6d5 Mon Sep 17 00:00:00 2001
From: Alexandru Ardelean <alexandru.ardelean@analog.com>
Date: Fri, 1 Nov 2019 11:35:03 +0200
Subject: [PATCH] iio: imu: adis16480: assign bias value only if operation
succeeded
commit 9b742763d9d4195e823ae6ece760c9ed0500c1dc upstream.
This was found only after the whole thing with the inline functions, but
the compiler actually found something. The value of the `bias` (in
adis16480_get_calibbias()) should only be set if the read operation was
successful.
No actual known problem occurs as users of this function all
ultimately check the return value. Hence probably not stable material.
Fixes: 2f3abe6cbb6c9 ("iio:imu: Add support for the ADIS16480 and similar IMUs")
Signed-off-by: Alexandru Ardelean <alexandru.ardelean@analog.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
diff --git a/drivers/iio/imu/adis16480.c b/drivers/iio/imu/adis16480.c
index 7b966a41d623..cf7b59d97802 100644
--- a/drivers/iio/imu/adis16480.c
+++ b/drivers/iio/imu/adis16480.c
@@ -454,12 +454,14 @@ static int adis16480_get_calibbias(struct iio_dev *indio_dev,
case IIO_MAGN:
case IIO_PRESSURE:
ret = adis_read_reg_16(&st->adis, reg, &val16);
- *bias = sign_extend32(val16, 15);
+ if (ret == 0)
+ *bias = sign_extend32(val16, 15);
break;
case IIO_ANGL_VEL:
case IIO_ACCEL:
ret = adis_read_reg_32(&st->adis, reg, &val32);
- *bias = sign_extend32(val32, 31);
+ if (ret == 0)
+ *bias = sign_extend32(val32, 31);
break;
default:
ret = -EINVAL;
--
2.7.4