iio: imu: st_lsm6dsx: introduce conf_lock mutex
Add conf_lock mutex to prevent concurrent FIFO configuration update Fixes: 290a6ce1 (iio: imu: add support to lsm6dsx driver) Signed-off-by: NLorenzo Bianconi <lorenzo.bianconi@redhat.com> Signed-off-by: NJonathan Cameron <Jonathan.Cameron@huawei.com> Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
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