s390/raw3270: use DEVICE_ATTR_RO() for sysfs attributes

Signed-off-by: Sven Schnelle <svens@linux.ibm.com>
Acked-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>

drivers/s390/char/raw3270.c

@@ -1095,30 +1095,30 @@ static int raw3270_probe(struct ccw_device *cdev)
 /*
  * Additional attributes for a 3270 device
  */
-static ssize_t raw3270_model_show(struct device *dev, struct device_attribute *attr,
+static ssize_t model_show(struct device *dev, struct device_attribute *attr,
 			  char *buf)
 {
 	return sysfs_emit(buf, "%i\n",
 			  ((struct raw3270 *)dev_get_drvdata(dev))->model);
 }
-static DEVICE_ATTR(model, 0444, raw3270_model_show, NULL);
+static DEVICE_ATTR_RO(model);
 
-static ssize_t raw3270_rows_show(struct device *dev, struct device_attribute *attr,
+static ssize_t rows_show(struct device *dev, struct device_attribute *attr,
 			 char *buf)
 {
 	return sysfs_emit(buf, "%i\n",
 			  ((struct raw3270 *)dev_get_drvdata(dev))->rows);
 }
-static DEVICE_ATTR(rows, 0444, raw3270_rows_show, NULL);
+static DEVICE_ATTR_RO(rows);
 
 static ssize_t
-raw3270_columns_show(struct device *dev, struct device_attribute *attr,
+columns_show(struct device *dev, struct device_attribute *attr,
 	     char *buf)
 {
 	return sysfs_emit(buf, "%i\n",
 			  ((struct raw3270 *)dev_get_drvdata(dev))->cols);
 }
-static DEVICE_ATTR(columns, 0444, raw3270_columns_show, NULL);
+static DEVICE_ATTR_RO(columns);
 
 static struct attribute *raw3270_attrs[] = {
 	&dev_attr_model.attr,