lkml.org 
[lkml]   [2020]   [Aug]   [20]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    Patch in this message
    /
    From
    Subject[PATCH 4.19 19/92] iio: dac: ad5592r: fix unbalanced mutex unlocks in ad5592r_read_raw()
    Date
    From: Alexandru Ardelean <alexandru.ardelean@analog.com>

    commit 65afb0932a81c1de719ceee0db0b276094b10ac8 upstream.

    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>
    Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

    ---
    drivers/iio/dac/ad5592r-base.c | 4 ++--
    1 file changed, 2 insertions(+), 2 deletions(-)

    --- a/drivers/iio/dac/ad5592r-base.c
    +++ b/drivers/iio/dac/ad5592r-base.c
    @@ -417,7 +417,7 @@ static int ad5592r_read_raw(struct iio_d
    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;

    @@ -448,7 +448,7 @@ static int ad5592r_read_raw(struct iio_d
    ret = IIO_VAL_INT;
    break;
    default:
    - ret = -EINVAL;
    + return -EINVAL;
    }

    unlock:

    \
     
     \ /
      Last update: 2020-08-20 14:24    [W:3.944 / U:0.012 seconds]
    ©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site