Driver Core: usb: add nodename support for usb drivers.

This adds support for USB drivers to report their requested nodename to
userspace.  It also updates a number of USB drivers to provide the
needed subdirectory and device name to be used for them.

Signed-off-by: Kay Sievers <kay.sievers@vrfy.org>
Signed-off-by: Jan Blunck <jblunck@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 12 insertions, 1 deletions

diff --git a/drivers/usb/core/file.c b/drivers/usb/core/file.c
index 997e659ff693..5cef88929b3e 100644
--- a/drivers/usb/core/file.c
+++ b/drivers/usb/core/file.c
@@ -67,6 +67,16 @@ static struct usb_class {
         struct class *class;
 } *usb_class;
 
+static char *usb_nodename(struct device *dev)
+{
+        struct usb_class_driver *drv;
+
+        drv = dev_get_drvdata(dev);
+        if (!drv || !drv->nodename)
+                return NULL;
+        return drv->nodename(dev);
+}
+
 static int init_usb_class(void)
 {
         int result = 0;
@@ -90,6 +100,7 @@ static int init_usb_class(void)
                 kfree(usb_class);
                 usb_class = NULL;
         }
+        usb_class->class->nodename = usb_nodename;
 
 exit:
         return result;
@@ -198,7 +209,7 @@ int usb_register_dev(struct usb_interface *intf,
         else
                 temp = name;
         intf->usb_dev = device_create(usb_class->class, &intf->dev,
-                                      MKDEV(USB_MAJOR, minor), NULL,
+                                      MKDEV(USB_MAJOR, minor), class_driver,
                                       "%s", temp);
         if (IS_ERR(intf->usb_dev)) {
                 down_write(&minor_rwsem);