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>

1 files changed, 1 insertions, 1 deletions

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 @@ struct hwmon_ops {
 	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);
 };