s390/pci: sysfs remove strlen

Get rid of the strlen calls, use the return value of sprintf instead.
Reviewed-by: Gerald Schaefer <gerald.schaefer@de.ibm.com>
Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

arch/s390/pci/pci_sysfs.c

@@ -17,8 +17,7 @@ static ssize_t show_fid(struct device *dev, struct device_attribute *attr,
 {
 	struct zpci_dev *zdev = get_zdev(to_pci_dev(dev));
 
-	sprintf(buf, "0x%08x\n", zdev->fid);
-	return strlen(buf);
+	return sprintf(buf, "0x%08x\n", zdev->fid);
 }
 static DEVICE_ATTR(function_id, S_IRUGO, show_fid, NULL);
 
@@ -27,8 +26,7 @@ static ssize_t show_fh(struct device *dev, struct device_attribute *attr,
 {
 	struct zpci_dev *zdev = get_zdev(to_pci_dev(dev));
 
-	sprintf(buf, "0x%08x\n", zdev->fh);
-	return strlen(buf);
+	return sprintf(buf, "0x%08x\n", zdev->fh);
 }
 static DEVICE_ATTR(function_handle, S_IRUGO, show_fh, NULL);
 
@@ -37,8 +35,7 @@ static ssize_t show_pchid(struct device *dev, struct device_attribute *attr,
 {
 	struct zpci_dev *zdev = get_zdev(to_pci_dev(dev));
 
-	sprintf(buf, "0x%04x\n", zdev->pchid);
-	return strlen(buf);
+	return sprintf(buf, "0x%04x\n", zdev->pchid);
 }
 static DEVICE_ATTR(pchid, S_IRUGO, show_pchid, NULL);
 
@@ -47,8 +44,7 @@ static ssize_t show_pfgid(struct device *dev, struct device_attribute *attr,
 {
 	struct zpci_dev *zdev = get_zdev(to_pci_dev(dev));
 
-	sprintf(buf, "0x%02x\n", zdev->pfgid);
-	return strlen(buf);
+	return sprintf(buf, "0x%02x\n", zdev->pfgid);
 }
 static DEVICE_ATTR(pfgid, S_IRUGO, show_pfgid, NULL);