regulator: fixed: Ensure enable_counter is correct if reg_domain_disable fails

dev_pm_genpd_set_performance_state() may fail, so had better to check it's
return value before decreasing priv->enable_counter.

Fixes: bf3a28cf4241 ("regulator: fixed: support using power domain for enable/disable")
Signed-off-by: Axel Lin <axel.lin@ingics.com>
Link: https://lore.kernel.org/r/20210520111811.1806293-1-axel.lin@ingics.com
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/drivers/regulator/fixed.c b/drivers/regulator/fixed.c
index 02ad831..34e255c 100644 (file)
--- a/drivers/regulator/fixed.c
+++ b/drivers/regulator/fixed.c
@@ -88,10 +88,15 @@ static int reg_domain_disable(struct regulator_dev *rdev)
 {
        struct fixed_voltage_data *priv = rdev_get_drvdata(rdev);
        struct device *dev = rdev->dev.parent;
+       int ret;
+
+       ret = dev_pm_genpd_set_performance_state(dev, 0);
+       if (ret)
+               return ret;
 
        priv->enable_counter--;
 
-       return dev_pm_genpd_set_performance_state(dev, 0);
+       return 0;
 }
 
 static int reg_is_enabled(struct regulator_dev *rdev)