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Subject[patch 065/123] hwmon: Fix off-by-one kind values
2.6.33-stable review patch.  If anyone has any objections, please let me know.

-----------------

From: Jean Delvare <khali@linux-fr.org>

commit dc71afe5ac7e8d049bb991330518e4c898a7d92e upstream.

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>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

---
drivers/hwmon/fschmd.c | 15 ++++++---------
drivers/hwmon/tmp401.c | 7 +++----
drivers/hwmon/tmp421.c | 4 ++--
3 files changed, 11 insertions(+), 15 deletions(-)

--- 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 devi
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(
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
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_clie
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_clien
(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_clien
}
}

- /* 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,
--- 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_clie
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_clien
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;

--- a/drivers/hwmon/tmp421.c
+++ b/drivers/hwmon/tmp421.c
@@ -254,9 +254,9 @@ static int tmp421_detect(struct i2c_clie
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;
}



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