linux-kernel - [PATCH 1/1] iio: light: fix improper return value

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Date:   Sat,  3 Dec 2016 17:24:17 +0800
From:   Pan Bian <bianpan2016@....com>
To:     Kevin Tsai <ktsai@...ellamicro.com>,
        Jonathan Cameron <jic23@...nel.org>,
        Hartmut Knaack <knaack.h@....de>,
        Lars-Peter Clausen <lars@...afoo.de>,
        Peter Meerwald-Stadler <pmeerw@...erw.net>,
        linux-iio@...r.kernel.org
Cc:     linux-kernel@...r.kernel.org, Pan Bian <bianpan2016@....com>
Subject: [PATCH 1/1] iio: light: fix improper return value

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>
---
 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 fe89b68..263e972 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;
 }
 
 /**
-- 
1.9.1