pm2301-charger: Check return value of regulator_enable

Check the return value of regulator_enable to silence the following
warning:
drivers/power/pm2301_charger.c:725:20: warning:
ignoring return value of ‘regulator_enable’, declared with
attribute warn_unused_result [-Wunused-result]

Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org>
Acked-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Anton Vorontsov <anton@enomsg.org>

1 files changed, 6 insertions, 2 deletions

diff --git a/drivers/power/pm2301_charger.c b/drivers/power/pm2301_charger.c
index ffa10ed83eb1..7214b667f940 100644
--- a/drivers/power/pm2301_charger.c
+++ b/drivers/power/pm2301_charger.c
@@ -722,8 +722,12 @@ static int pm2xxx_charger_ac_en(struct ux500_charger *charger,
 
                 dev_dbg(pm2->dev, "Enable AC: %dmV %dmA\n", vset, iset);
                 if (!pm2->vddadc_en_ac) {
-                        regulator_enable(pm2->regu);
-                        pm2->vddadc_en_ac = true;
+                        ret = regulator_enable(pm2->regu);
+                        if (ret)
+                                dev_warn(pm2->dev,
+                                        "Failed to enable vddadc regulator\n");
+                        else
+                                pm2->vddadc_en_ac = true;
                 }
 
                 ret = pm2xxx_charging_init(pm2);