regulator: core: Avoid deadlock when regulator_register fails
When regulator_register fails and exits through the scrub path the regulator_put function was called whilst holding the regulator_list_mutex, causing deadlock. This patch adds a private version of the regulator_put function which can be safely called whilst holding the mutex, replacing the aforementioned call. Signed-off-by: NCharles Keepax <ckeepax@opensource.wolfsonmicro.com> Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>
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