linux-kernel - [PATCH AUTOSEL for 4.4 18/28] iio: light: fix improper return value

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Message-ID: <20171115024551.5988-18-alexander.levin@verizon.com>
Date:   Wed, 15 Nov 2017 02:46:02 +0000
From:   alexander.levin@...izon.com
To:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "stable@...r.kernel.org" <stable@...r.kernel.org>
Cc:     Pan Bian <bianpan2016@....com>,
        Jonathan Cameron <jic23@...nel.org>,
        alexander.levin@...izon.com
Subject: [PATCH AUTOSEL for 4.4 18/28] iio: light: fix improper return value

From: Pan Bian <bianpan2016@....com>

[ Upstream commit db4e5376d058af8924fafd0520a0942d92538d0e ]

In function cm3232_reg_init(), it returns 0 even if the last call to
i2c_smbus_write_byte_data() returns a negative value (indicates error).
As a result, the return value may be inconsistent with the execution
status, and the caller of cm3232_reg_init() will not be able to detect
the error. This patch fixes the bug.

Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=188641

Signed-off-by: Pan Bian <bianpan2016@....com>
Signed-off-by: Jonathan Cameron <jic23@...nel.org>
Signed-off-by: Sasha Levin <alexander.levin@...izon.com>
---
 drivers/iio/light/cm3232.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/iio/light/cm3232.c b/drivers/iio/light/cm3232.c
index fe89b6823217..263e97235ea0 100644
--- a/drivers/iio/light/cm3232.c
+++ b/drivers/iio/light/cm3232.c
@@ -119,7 +119,7 @@ static int cm3232_reg_init(struct cm3232_chip *chip)
 	if (ret < 0)
 		dev_err(&chip->client->dev, "Error writing reg_cmd\n");
 
-	return 0;
+	return ret;
 }
 
 /**
-- 
2.11.0