linux-kernel - [PATCH v3 1/4] ab8500-charger: Check return value of regulator

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Message-Id: <1378454473-24508-1-git-send-email-sachin.kamat@linaro.org>
Date:	Fri,  6 Sep 2013 13:31:09 +0530
From:	Sachin Kamat <sachin.kamat@...aro.org>
To:	linux-kernel@...r.kernel.org
Cc:	anton@...msg.org, dwmw2@...radead.org, lee.jones@...aro.org,
	sachin.kamat@...aro.org
Subject: [PATCH v3 1/4] 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@...aro.org>
Cc: Lee Jones <lee.jones@...aro.org>
---
Compile tested.

Changes since v2:
* removed redundant assignment to false.
Changes since v1:
* converted dev_err and return to dev_warn as suggested by Lee Jones.
---

 drivers/power/ab8500_charger.c |   16 ++++++++++++----
 1 file changed, 12 insertions(+), 4 deletions(-)

diff --git a/drivers/power/ab8500_charger.c b/drivers/power/ab8500_charger.c
index a4c4a10..fd35018 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 */
-- 
1.7.9.5

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