power: supply: cros_charge-control: add mutex for driver data

power: supply: cros_charge-control: add mutex for driver data

commit e5f84d1cf562f7b45e28d6e5f6490626f870f81c upstream.

Concurrent accesses through sysfs may lead to inconsistent state in the
priv data. Introduce a mutex to avoid this.

Fixes: c6ed48ef5259 ("power: supply: add ChromeOS EC based charge control driver")
Cc: stable@vger.kernel.org
Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
Link: https://lore.kernel.org/r/20241208-cros_charge-control-v2-v1-1-8d168d0f08a3@weissschuh.net
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>