linux-kernel - [PATCH 3.16 072/410] power: supply: ab8500_charger: Bail out in case of error in 'ab8500_charger_init_hw

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Date:   Thu, 07 Jun 2018 15:05:21 +0100
From:   Ben Hutchings <ben@...adent.org.uk>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
CC:     akpm@...ux-foundation.org,
        "Christophe JAILLET" <christophe.jaillet@...adoo.fr>,
        "Sebastian Reichel" <sebastian.reichel@...labora.co.uk>
Subject: [PATCH 3.16 072/410] power: supply: ab8500_charger: Bail out in
 case of error in 'ab8500_charger_init_hw_registers()'

3.16.57-rc1 review patch.  If anyone has any objections, please let me know.

------------------

From: Christophe JAILLET <christophe.jaillet@...adoo.fr>

commit 09edcb647542487864e23aa8d2ef26be3e08978a upstream.

If an error occurs when we enable the backup battery charging, we should
go through the error handling path directly.

Before commit db43e6c473b5 ("ab8500-bm: Add usb power path support") this
was the case, but this commit has added some code between the last test and
the 'out' label.
So, in case of error, this added code is executed and the error may be
silently ignored.

Fix it by adding the missing 'goto out', as done in all other error
handling paths.

Fixes: db43e6c473b5 ("ab8500-bm: Add usb power path support")
Signed-off-by: Christophe JAILLET <christophe.jaillet@...adoo.fr>
Signed-off-by: Sebastian Reichel <sebastian.reichel@...labora.co.uk>
[bwh: Backported to 3.16: adjust filename]
Signed-off-by: Ben Hutchings <ben@...adent.org.uk>
---
 drivers/power/ab8500_charger.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

--- a/drivers/power/ab8500_charger.c
+++ b/drivers/power/ab8500_charger.c
@@ -3227,8 +3227,10 @@ static int ab8500_charger_init_hw_regist
 	ret = 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)
+	if (ret < 0) {
 		dev_err(di->dev, "%s mask and set failed\n", __func__);
+		goto out;
+	}
 
 	if (is_ab8540(di->parent)) {
 		ret = abx500_mask_and_set_register_interruptible(di->dev,