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| author | Alexandru Ardelean <alexandru.ardelean@analog.com> | 2020-07-06 14:02:57 +0300 |
|---|---|---|
| committer | Jonathan Cameron <Jonathan.Cameron@huawei.com> | 2020-07-22 16:51:54 +0300 |
| commit | 65afb0932a81c1de719ceee0db0b276094b10ac8 (patch) | |
| tree | 477814fe774896e48c14da4e1ce416bfe3ef7c56 | |
| parent | 1c2f21be65028b25e778e52b106b8b719b3f9ed9 (diff) | |
| download | linux-65afb0932a81c1de719ceee0db0b276094b10ac8.tar.xz | |
iio: dac: ad5592r: fix unbalanced mutex unlocks in ad5592r_read_raw()
There are 2 exit paths where the lock isn't held, but try to unlock the
mutex when exiting. In these places we should just return from the
function.
A neater approach would be to cleanup the ad5592r_read_raw(), but that
would make this patch more difficult to backport to stable versions.
Fixes 56ca9db862bf3: ("iio: dac: Add support for the AD5592R/AD5593R ADCs/DACs")
Reported-by: Charles Stanhope <charles.stanhope@gmail.com>
Signed-off-by: Alexandru Ardelean <alexandru.ardelean@analog.com>
Cc: <Stable@vger.kernel.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
| -rw-r--r-- | drivers/iio/dac/ad5592r-base.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/iio/dac/ad5592r-base.c b/drivers/iio/dac/ad5592r-base.c index 5c4e5ff70380..cc4875660a69 100644 --- a/drivers/iio/dac/ad5592r-base.c +++ b/drivers/iio/dac/ad5592r-base.c @@ -413,7 +413,7 @@ static int ad5592r_read_raw(struct iio_dev *iio_dev, s64 tmp = *val * (3767897513LL / 25LL); *val = div_s64_rem(tmp, 1000000000LL, val2); - ret = IIO_VAL_INT_PLUS_MICRO; + return IIO_VAL_INT_PLUS_MICRO; } else { int mult; @@ -444,7 +444,7 @@ static int ad5592r_read_raw(struct iio_dev *iio_dev, ret = IIO_VAL_INT; break; default: - ret = -EINVAL; + return -EINVAL; } unlock: |