From: Axel Lin <axel.lin@ingics.com>
Date: Tue, 10 Feb 2015 10:24:07 +0000 (+0800)
Subject: hwmon: (ads7828) Check return value of devm_regmap_init_i2c
X-Git-Tag: firefly_0821_release~176^2~2231^2
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=d9ef72cd1c15c2fc1f7131cd78304dd21bc15953;p=firefly-linux-kernel-4.4.55.git

hwmon: (ads7828) Check return value of devm_regmap_init_i2c

devm_regmap_init_i2c() can fail, thus add return value checking.

Signed-off-by: Axel Lin <axel.lin@ingics.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
---

diff --git a/drivers/hwmon/ads7828.c b/drivers/hwmon/ads7828.c
index bce4e9ff21bf..6c99ee7bafa3 100644
--- a/drivers/hwmon/ads7828.c
+++ b/drivers/hwmon/ads7828.c
@@ -147,6 +147,9 @@ static int ads7828_probe(struct i2c_client *client,
 						    &ads2830_regmap_config);
 	}
 
+	if (IS_ERR(data->regmap))
+		return PTR_ERR(data->regmap);
+
 	data->cmd_byte = ext_vref ? ADS7828_CMD_PD1 : ADS7828_CMD_PD3;
 	if (!diff_input)
 		data->cmd_byte |= ADS7828_CMD_SD_SE;