hwmon: Constify str parameter of hwmon_ops->read_string
The read_string callback is supposed to retrieve a pointer to a
constant string.
Signed-off-by: Jean Delvare <jdelvare@suse.de>
Reviewed-by: Peter Huewe <peterhuewe@gmx.de>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
diff --git a/drivers/hwmon/hwmon.c b/drivers/hwmon/hwmon.c
index 28375d5..dd6e17c 100644
--- a/drivers/hwmon/hwmon.c
+++ b/drivers/hwmon/hwmon.c
@@ -186,7 +186,7 @@
char *buf)
{
struct hwmon_device_attribute *hattr = to_hwmon_attr(devattr);
- char *s;
+ const char *s;
int ret;
ret = hattr->ops->read_string(dev, hattr->type, hattr->attr,
diff --git a/include/linux/hwmon.h b/include/linux/hwmon.h
index 88b6737..ceb7519 100644
--- a/include/linux/hwmon.h
+++ b/include/linux/hwmon.h
@@ -337,7 +337,7 @@
int (*read)(struct device *dev, enum hwmon_sensor_types type,
u32 attr, int channel, long *val);
int (*read_string)(struct device *dev, enum hwmon_sensor_types type,
- u32 attr, int channel, char **str);
+ u32 attr, int channel, const char **str);
int (*write)(struct device *dev, enum hwmon_sensor_types type,
u32 attr, int channel, long val);
};