ab8500-charger: Check return value of regulator_enable

Check the return value of regulator_enable to silence the following
type of warnings:
drivers/power/ab8500_charger.c:1390:20: 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, 12 insertions, 4 deletions

diff --git a/drivers/power/ab8500_charger.c b/drivers/power/ab8500_charger.c
index a4c4a10b3a41..fd350189b632 100644
--- a/drivers/power/ab8500_charger.c
+++ b/drivers/power/ab8500_charger.c
@@ -1387,8 +1387,12 @@ static int ab8500_charger_ac_en(struct ux500_charger *charger,
                  * the GPADC module independant of the AB8500 chargers
                  */
                 if (!di->vddadc_en_ac) {
-                        regulator_enable(di->regu);
-                        di->vddadc_en_ac = true;
+                        ret = regulator_enable(di->regu);
+                        if (ret)
+                                dev_warn(di->dev,
+                                        "Failed to enable regulator\n");
+                        else
+                                di->vddadc_en_ac = true;
                 }
 
                 /* Check if the requested voltage or current is valid */
@@ -1556,8 +1560,12 @@ static int ab8500_charger_usb_en(struct ux500_charger *charger,
                  * the GPADC module independant of the AB8500 chargers
                  */
                 if (!di->vddadc_en_usb) {
-                        regulator_enable(di->regu);
-                        di->vddadc_en_usb = true;
+                        ret = regulator_enable(di->regu);
+                        if (ret)
+                                dev_warn(di->dev,
+                                        "Failed to enable regulator\n");
+                        else
+                                di->vddadc_en_usb = true;
                 }
 
                 /* Enable USB charging */