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drivers: regulator: fix reference count underflow

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Fixes regulator reference count underflow and adds error code
for attempting to disable an already disabled regulator

Signed-off-by: Vladislav Litvinov <vladislav.litvinov@nordicsemi.no>
This commit is contained in:
Vladislav Litvinov 2024-04-15 15:16:33 +02:00 committed by Carles Cufí
parent 08cd4b6cce
commit 95622e49b2
1 changed files with 7 additions and 5 deletions
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2
drivers/regulator/regulator_common.c
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@ -183,6 +183,7 @@ int regulator_disable(const struct device *dev)
(void)k_mutex_lock(&data->lock, K_FOREVER); (void)k_mutex_lock(&data->lock, K_FOREVER);
#endif #endif
if (data->refcnt > 0) {
data->refcnt--; data->refcnt--;
if (data->refcnt == 0) { if (data->refcnt == 0) {
@ -191,6 +192,7 @@ int regulator_disable(const struct device *dev)
data->refcnt++; data->refcnt++;
} }
} }
}
#ifdef CONFIG_REGULATOR_THREAD_SAFE_REFCNT #ifdef CONFIG_REGULATOR_THREAD_SAFE_REFCNT
k_mutex_unlock(&data->lock); k_mutex_unlock(&data->lock);