usbfs: don't store bad pointers in registration

This patch (as1107) fixes a small bug in the usbfs registration and
unregistration code.  It avoids leaving an error value stored in the
device's usb_classdev field and it avoids trying to unregister a NULL
pointer.  (It also fixes a rather extreme overuse of whitespace.)

Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/drivers/usb/core/devio.c b/drivers/usb/core/devio.c
index c44e98f..5580c6e 100644 (file)
--- a/drivers/usb/core/devio.c
+++ b/drivers/usb/core/devio.c
@@ -1726,20 +1726,21 @@ static struct class *usb_classdev_class;
 
 static int usb_classdev_add(struct usb_device *dev)
 {
-       int minor = ((dev->bus->busnum-1) * 128) + (dev->devnum-1);
-
-       dev->usb_classdev = device_create(usb_classdev_class, &dev->dev,
-                               MKDEV(USB_DEVICE_MAJOR, minor),
-                               "usbdev%d.%d", dev->bus->busnum, dev->devnum);
-       if (IS_ERR(dev->usb_classdev))
-               return PTR_ERR(dev->usb_classdev);
-
+       struct device *cldev;
+
+       cldev = device_create(usb_classdev_class, &dev->dev, dev->dev.devt,
+                             "usbdev%d.%d", dev->bus->busnum,
+                             dev->devnum);
+       if (IS_ERR(cldev))
+               return PTR_ERR(cldev);
+       dev->usb_classdev = cldev;
        return 0;
 }
 
 static void usb_classdev_remove(struct usb_device *dev)
 {
-       device_unregister(dev->usb_classdev);
+       if (dev->usb_classdev)
+               device_unregister(dev->usb_classdev);
        usb_fs_classdev_common_remove(dev);
 }