USB storage: audit sysfs attribute permissions

Convert the usbsorage sysfs attribute to use the _RW macro to make it
easier to determine the permissions for the file.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/usb/storage/scsiglue.c

@@ -496,7 +496,7 @@ US_DO_ALL_FLAGS
  ***********************************************************************/
 
 /* Output routine for the sysfs max_sectors file */
-static ssize_t show_max_sectors(struct device *dev, struct device_attribute *attr, char *buf)
+static ssize_t max_sectors_show(struct device *dev, struct device_attribute *attr, char *buf)
 {
 	struct scsi_device *sdev = to_scsi_device(dev);
 
@@ -504,7 +504,7 @@ static ssize_t show_max_sectors(struct device *dev, struct device_attribute *att
 }
 
 /* Input routine for the sysfs max_sectors file */
-static ssize_t store_max_sectors(struct device *dev, struct device_attribute *attr, const char *buf,
+static ssize_t max_sectors_store(struct device *dev, struct device_attribute *attr, const char *buf,
 		size_t count)
 {
 	struct scsi_device *sdev = to_scsi_device(dev);
@@ -514,16 +514,14 @@ static ssize_t store_max_sectors(struct device *dev, struct device_attribute *at
 		blk_queue_max_hw_sectors(sdev->request_queue, ms);
 		return count;
 	}
-	return -EINVAL;	
+	return -EINVAL;
 }
-
-static DEVICE_ATTR(max_sectors, S_IRUGO | S_IWUSR, show_max_sectors,
-		store_max_sectors);
+static DEVICE_ATTR_RW(max_sectors);
 
 static struct device_attribute *sysfs_device_attr_list[] = {
-		&dev_attr_max_sectors,
-		NULL,
-		};
+	&dev_attr_max_sectors,
+	NULL,
+};
 
 /*
  * this defines our host template, with which we'll allocate hosts