diff options
| author | Dan Carpenter <dan.carpenter@oracle.com> | 2021-01-06 09:41:09 +0100 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2021-01-07 18:13:51 +0100 |
| commit | 0fe1329b7b518f67c8f1760711eb0eaf90433fd3 (patch) | |
| tree | 84caa9ccdee58a1306207a6315d3d6d4e9417e26 /drivers/powercap | |
| parent | powercap/drivers/dtpm: Fix a double shift bug (diff) | |
| download | linux-0fe1329b7b518f67c8f1760711eb0eaf90433fd3.tar.xz linux-0fe1329b7b518f67c8f1760711eb0eaf90433fd3.zip | |
powercap/drivers/dtpm: Fix some missing unlock bugs
We need to unlock on these paths before returning.
Fixes: a20d0ef97abf ("powercap/drivers/dtpm: Add API for dynamic thermal power management")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Acked-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'drivers/powercap')
| -rw-r--r-- | drivers/powercap/dtpm.c | 17 |
1 files changed, 12 insertions, 5 deletions
diff --git a/drivers/powercap/dtpm.c b/drivers/powercap/dtpm.c index d49df0569cd4..470a1182b868 100644 --- a/drivers/powercap/dtpm.c +++ b/drivers/powercap/dtpm.c @@ -147,13 +147,17 @@ static void __dtpm_add_power(struct dtpm *dtpm) */ int dtpm_update_power(struct dtpm *dtpm, u64 power_min, u64 power_max) { + int ret = 0; + mutex_lock(&dtpm_lock); if (power_min == dtpm->power_min && power_max == dtpm->power_max) - return 0; + goto unlock; - if (power_max < power_min) - return -EINVAL; + if (power_max < power_min) { + ret = -EINVAL; + goto unlock; + } __dtpm_sub_power(dtpm); @@ -164,9 +168,10 @@ int dtpm_update_power(struct dtpm *dtpm, u64 power_min, u64 power_max) __dtpm_add_power(dtpm); +unlock: mutex_unlock(&dtpm_lock); - return 0; + return ret; } /** @@ -187,8 +192,10 @@ int dtpm_release_zone(struct powercap_zone *pcz) mutex_lock(&dtpm_lock); - if (!list_empty(&dtpm->children)) + if (!list_empty(&dtpm->children)) { + mutex_unlock(&dtpm_lock); return -EBUSY; + } if (parent) list_del(&dtpm->sibling); |