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authorTakashi Iwai <tiwai@suse.de>2019-02-14 11:45:40 +0100
committerTakashi Iwai <tiwai@suse.de>2019-02-14 11:45:41 +0100
commit1c26a85812a79fb7eeae424e1e141f19617e16ee (patch)
tree40cb3268fd507d7e6d2236f2c0c38cd8b7350d41
parent6bdff5a0736f9d183770aa3ae5c236d5e54f1673 (diff)
hwmon: (lm80) fix a missing check of the status of SMBus read
(bsc#1051510). suse-commit: b7264877121d89972f08333932efa3e79f41b89c
-rw-r--r--drivers/hwmon/lm80.c15
1 files changed, 10 insertions, 5 deletions
diff --git a/drivers/hwmon/lm80.c b/drivers/hwmon/lm80.c
index 08e3945a6fbf..04f9df0d2341 100644
--- a/drivers/hwmon/lm80.c
+++ b/drivers/hwmon/lm80.c
@@ -360,9 +360,11 @@ static ssize_t set_fan_div(struct device *dev, struct device_attribute *attr,
struct i2c_client *client = data->client;
unsigned long min, val;
u8 reg;
- int err = kstrtoul(buf, 10, &val);
- if (err < 0)
- return err;
+ int rv;
+
+ rv = kstrtoul(buf, 10, &val);
+ if (rv < 0)
+ return rv;
/* Save fan_min */
mutex_lock(&data->update_lock);
@@ -390,8 +392,11 @@ static ssize_t set_fan_div(struct device *dev, struct device_attribute *attr,
return -EINVAL;
}
- reg = (lm80_read_value(client, LM80_REG_FANDIV) &
- ~(3 << (2 * (nr + 1)))) | (data->fan_div[nr] << (2 * (nr + 1)));
+ rv = lm80_read_value(client, LM80_REG_FANDIV);
+ if (rv < 0)
+ return rv;
+ reg = (rv & ~(3 << (2 * (nr + 1))))
+ | (data->fan_div[nr] << (2 * (nr + 1)));
lm80_write_value(client, LM80_REG_FANDIV, reg);
/* Restore fan_min */