linux-kernel - [PATCH for 4.9 15/59] power: supply: axp288_fuel_gauge: Fix fuel_gauge_reg

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Date:   Thu, 14 Sep 2017 15:51:08 +0000
From:   "Levin, Alexander (Sasha Levin)" <alexander.levin@...izon.com>
To:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "stable@...r.kernel.org" <stable@...r.kernel.org>
Cc:     Hans de Goede <hdegoede@...hat.com>,
        Sebastian Reichel <sre@...nel.org>,
        "Levin, Alexander (Sasha Levin)" <alexander.levin@...izon.com>
Subject: [PATCH for 4.9 15/59] power: supply: axp288_fuel_gauge: Fix
 fuel_gauge_reg_readb return on error

From: Hans de Goede <hdegoede@...hat.com>

[ Upstream commit 6f074bc878dc9b00c0df0bf3a8cb1d9e294cd881 ]

If reading the register fails, return the actual error code, instead
of the uninitialized val variable;

Signed-off-by: Hans de Goede <hdegoede@...hat.com>
Signed-off-by: Sebastian Reichel <sre@...nel.org>
Signed-off-by: Sasha Levin <alexander.levin@...izon.com>
---
 drivers/power/supply/axp288_fuel_gauge.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/power/supply/axp288_fuel_gauge.c b/drivers/power/supply/axp288_fuel_gauge.c
index 5bdde692f724..f62f9dfea984 100644
--- a/drivers/power/supply/axp288_fuel_gauge.c
+++ b/drivers/power/supply/axp288_fuel_gauge.c
@@ -169,8 +169,10 @@ static int fuel_gauge_reg_readb(struct axp288_fg_info *info, int reg)
 			break;
 	}
 
-	if (ret < 0)
+	if (ret < 0) {
 		dev_err(&info->pdev->dev, "axp288 reg read err:%d\n", ret);
+		return ret;
+	}
 
 	return val;
 }
-- 
2.11.0