iio: admv1013: initialize callback mutex before registering notifier

admv1013_probe() registers a clock notifier whose callback takes st->lock
on POST_RATE_CHANGE. Initialize the mutex before
devm_clk_notifier_register() so the callback cannot observe an
uninitialized lock during probe.

Use devm_mutex_init() so the lock lifetime is tied to the device and
cleanup stays paired with the rest of the managed probe resources.

Fixes: da35a7b526d9 ("iio: frequency: admv1013: add support for ADMV1013")
Cc: stable@vger.kernel.org
Signed-off-by: Runyu Xiao <runyu.xiao@seu.edu.cn>
Signed-off-by: Jonathan Cameron <jonathan.cameron@oss.qualcomm.com>

0 files changed, 0 insertions, 0 deletions