hwmon: Fix off-by-one kind values

Recent changes on the I2C front have left off-by-one array indexes in
3 hwmon drivers. Fix them.

Faulty commit:
e5e9f44c2 i2c: Drop I2C_CLIENT_INSMOD_2 to 8

Reported-by: Dan Carpenter <error27@gmail.com>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Cc: Hans de Goede <hdegoede@redhat.com>
Cc: Andre Prendel <andre.prendel@gmx.de>
Cc: stable@kernel.org

3 files changed, 11 insertions, 15 deletions

diff --git a/drivers/hwmon/fschmd.c b/drivers/hwmon/fschmd.c
index fa0728232e7..0627f7a5b9b 100644
--- a/drivers/hwmon/fschmd.c
+++ b/drivers/hwmon/fschmd.c
@@ -267,7 +267,7 @@ struct fschmd_data {
         struct list_head list; /* member of the watchdog_data_list */
         struct kref kref;
         struct miscdevice watchdog_miscdev;
-        int kind;
+        enum chips kind;
         unsigned long watchdog_is_open;
         char watchdog_expect_close;
         char watchdog_name[10]; /* must be unique to avoid sysfs conflict */
@@ -325,8 +325,7 @@ static ssize_t show_in_value(struct device *dev,
         int index = to_sensor_dev_attr(devattr)->index;
         struct fschmd_data *data = fschmd_update_device(dev);
 
-        /* fscher / fschrc - 1 as data->kind is an array index, not a chips */
-        if (data->kind == (fscher - 1) || data->kind >= (fschrc - 1))
+        if (data->kind == fscher || data->kind >= fschrc)
                 return sprintf(buf, "%d\n", (data->volt[index] * dmi_vref *
                         dmi_mult[index]) / 255 + dmi_offset[index]);
         else
@@ -492,7 +491,7 @@ static ssize_t show_pwm_auto_point1_pwm(struct device *dev,
         int val = data->fan_min[index];
 
         /* 0 = allow turning off (except on the syl), 1-255 = 50-100% */
-        if (val || data->kind == fscsyl - 1)
+        if (val || data->kind == fscsyl)
                 val = val / 2 + 128;
 
         return sprintf(buf, "%d\n", val);
@@ -506,7 +505,7 @@ static ssize_t store_pwm_auto_point1_pwm(struct device *dev,
         unsigned long v = simple_strtoul(buf, NULL, 10);
 
         /* reg: 0 = allow turning off (except on the syl), 1-255 = 50-100% */
-        if (v || data->kind == fscsyl - 1) {
+        if (v || data->kind == fscsyl) {
                 v = SENSORS_LIMIT(v, 128, 255);
                 v = (v - 128) * 2 + 1;
         }
@@ -1037,7 +1036,7 @@ static int fschmd_detect(struct i2c_client *client,
         else
                 return -ENODEV;
 
-        strlcpy(info->type, fschmd_id[kind - 1].name, I2C_NAME_SIZE);
+        strlcpy(info->type, fschmd_id[kind].name, I2C_NAME_SIZE);
 
         return 0;
 }
@@ -1065,6 +1064,7 @@ static int fschmd_probe(struct i2c_client *client,
            (where the client is found through a data ptr instead of the
            otherway around) */
         data->client = client;
+        data->kind = kind;
 
         if (kind == fscpos) {
                 /* The Poseidon has hardwired temp limits, fill these
@@ -1085,9 +1085,6 @@ static int fschmd_probe(struct i2c_client *client,
                 }
         }
 
-        /* i2c kind goes from 1-6, we want from 0-5 to address arrays */
-        data->kind = kind - 1;
-
         /* Read in some never changing registers */
         data->revision = i2c_smbus_read_byte_data(client, FSCHMD_REG_REVISION);
         data->global_control = i2c_smbus_read_byte_data(client,
diff --git a/drivers/hwmon/tmp401.c b/drivers/hwmon/tmp401.c
index a13b30e8d8d..d14a1af9f55 100644
--- a/drivers/hwmon/tmp401.c
+++ b/drivers/hwmon/tmp401.c
@@ -134,7 +134,7 @@ struct tmp401_data {
         struct mutex update_lock;
         char valid; /* zero until following fields are valid */
         unsigned long last_updated; /* in jiffies */
-        int kind;
+        enum chips kind;
 
         /* register values */
         u8 status;
@@ -524,7 +524,7 @@ static int tmp401_detect(struct i2c_client *client,
         if (reg > 15)
                 return -ENODEV;
 
-        strlcpy(info->type, tmp401_id[kind - 1].name, I2C_NAME_SIZE);
+        strlcpy(info->type, tmp401_id[kind].name, I2C_NAME_SIZE);
 
         return 0;
 }
@@ -572,8 +572,7 @@ static int tmp401_probe(struct i2c_client *client,
                 goto exit_remove;
         }
 
-        dev_info(&client->dev, "Detected TI %s chip\n",
-                 names[data->kind - 1]);
+        dev_info(&client->dev, "Detected TI %s chip\n", names[data->kind]);
 
         return 0;
 
diff --git a/drivers/hwmon/tmp421.c b/drivers/hwmon/tmp421.c
index bb9760d7e8b..738c472ece2 100644
--- a/drivers/hwmon/tmp421.c
+++ b/drivers/hwmon/tmp421.c
@@ -254,9 +254,9 @@ static int tmp421_detect(struct i2c_client *client,
                 return -ENODEV;
         }
 
-        strlcpy(info->type, tmp421_id[kind - 1].name, I2C_NAME_SIZE);
+        strlcpy(info->type, tmp421_id[kind].name, I2C_NAME_SIZE);
         dev_info(&adapter->dev, "Detected TI %s chip at 0x%02x\n",
-                 names[kind - 1], client->addr);
+                 names[kind], client->addr);
 
         return 0;
 }