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From:   Sasha Levin <Alexander.Levin@microsoft.com>
To:     "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
        "stable@vger.kernel.org" <stable@vger.kernel.org>
CC:     Christophe JAILLET <christophe.jaillet@wanadoo.fr>,
        Sebastian Reichel <sebastian.reichel@collabora.co.uk>,
        Sasha Levin <Alexander.Levin@microsoft.com>
Subject: [PATCH AUTOSEL for 4.9 191/219] power: supply: ab8500_charger: Fix an
 error handling path
Thread-Topic: [PATCH AUTOSEL for 4.9 191/219] power: supply: ab8500_charger:
 Fix an error handling path
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Date:   Sat, 3 Mar 2018 22:29:48 +0000
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From: Christophe JAILLET <christophe.jaillet@wanadoo.fr>

[ Upstream commit bf59fddde1c3eab89eb8dca8f3d3dc097887d2bb ]

'ret' is know to be 0 at this point, because it has not been updated by the
the previous call to 'abx500_mask_and_set_register_interruptible()'.

Fix it by updating 'ret' before checking if an error occurred.

Fixes: 84edbeeab67c ("ab8500-charger: AB8500 charger driver")
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.co.uk>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
---
 drivers/power/supply/ab8500_charger.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/power/supply/ab8500_charger.c b/drivers/power/supply/a=
b8500_charger.c
index 5cee9aa87aa3..037e93224c38 100644
--- a/drivers/power/supply/ab8500_charger.c
+++ b/drivers/power/supply/ab8500_charger.c
@@ -3218,7 +3218,7 @@ static int ab8500_charger_init_hw_registers(struct ab=
8500_charger *di)
 	}
=20
 	/* Enable backup battery charging */
-	abx500_mask_and_set_register_interruptible(di->dev,
+	ret =3D abx500_mask_and_set_register_interruptible(di->dev,
 		AB8500_RTC, AB8500_RTC_CTRL_REG,
 		RTC_BUP_CH_ENA, RTC_BUP_CH_ENA);
 	if (ret < 0)
--=20
2.14.1