linux-kernel - [PATCH 3.18 22/38] backlight: adp5520: Fix error handling in adp5520_bl

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Date:   Sun, 19 Nov 2017 15:29:38 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Alexey Khoroshilov <khoroshilov@...ras.ru>,
        Michael Hennerich <michael.hennerich@...log.com>,
        Lee Jones <lee.jones@...aro.org>,
        Sasha Levin <alexander.levin@...izon.com>
Subject: [PATCH 3.18 22/38] backlight: adp5520: Fix error handling in adp5520_bl_probe()

3.18-stable review patch.  If anyone has any objections, please let me know.

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

From: Alexey Khoroshilov <khoroshilov@...ras.ru>


[ Upstream commit 0eb3fba8c68275f0122f65f7316efaaf86448016 ]

If adp5520_bl_setup() fails, sysfs group left unremoved.

By the way, fix overcomplicated assignement of error code.

Found by Linux Driver Verification project (linuxtesting.org).

Signed-off-by: Alexey Khoroshilov <khoroshilov@...ras.ru>
Acked-by: Michael Hennerich <michael.hennerich@...log.com>
Signed-off-by: Lee Jones <lee.jones@...aro.org>
Signed-off-by: Sasha Levin <alexander.levin@...izon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/video/backlight/adp5520_bl.c |   12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

--- a/drivers/video/backlight/adp5520_bl.c
+++ b/drivers/video/backlight/adp5520_bl.c
@@ -332,10 +332,18 @@ static int adp5520_bl_probe(struct platf
 	}
 
 	platform_set_drvdata(pdev, bl);
-	ret |= adp5520_bl_setup(bl);
+	ret = adp5520_bl_setup(bl);
+	if (ret) {
+		dev_err(&pdev->dev, "failed to setup\n");
+		if (data->pdata->en_ambl_sens)
+			sysfs_remove_group(&bl->dev.kobj,
+					&adp5520_bl_attr_group);
+		return ret;
+	}
+
 	backlight_update_status(bl);
 
-	return ret;
+	return 0;
 }
 
 static int adp5520_bl_remove(struct platform_device *pdev)