Merge branch 'debugfs_automount' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs

Pull debugfs patches from Al Viro:
 "debugfs patches, mostly to make it possible for something like tracefs
  to be transparently automounted on given directory in debugfs.

  New primitive in there is debugfs_create_automount(name, parent, func,
  arg), which creates a directory and makes its ->d_automount() return
  func(arg).  Another missing primitive was debugfs_create_file_size() -
  open-coded in quite a few places.  Dave's patch adds it and converts
  the open-code instances to calling it"

* 'debugfs_automount' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
  debugfs: Provide a file creation function that also takes an initial size
  new primitive: debugfs_create_automount()
  debugfs: split end_creating() into success and failure cases
  debugfs: take mode-dependent parts of debugfs_get_inode() into callers
  fold debugfs_mknod() into callers
  fold debugfs_create() into caller
  fold debugfs_mkdir() into caller
  debugfs_mknod(): get rid useless arguments
  fold debugfs_link() into caller
  debugfs: kill __create_file()
  debugfs: split the beginning and the end of __create_file() off
  debugfs_{mkdir,create,link}(): get rid of redundant argument

1 files changed, 9 insertions, 6 deletions

diff --git a/drivers/usb/gadget/udc/atmel_usba_udc.c b/drivers/usb/gadget/udc/atmel_usba_udc.c
index c0410862c2a1..d79cb35dbf8a 100644
--- a/drivers/usb/gadget/udc/atmel_usba_udc.c
+++ b/drivers/usb/gadget/udc/atmel_usba_udc.c
@@ -265,14 +265,17 @@ static void usba_init_debugfs(struct usba_udc *udc)
                 goto err_root;
         udc->debugfs_root = root;
 
-        regs = debugfs_create_file("regs", 0400, root, udc, &regs_dbg_fops);
-        if (!regs)
-                goto err_regs;
-
         regs_resource = platform_get_resource(udc->pdev, IORESOURCE_MEM,
                                 CTRL_IOMEM_ID);
-        regs->d_inode->i_size = resource_size(regs_resource);
-        udc->debugfs_regs = regs;
+
+        if (regs_resource) {
+                regs = debugfs_create_file_size("regs", 0400, root, udc,
+                                                &regs_dbg_fops,
+                                                resource_size(regs_resource));
+                if (!regs)
+                        goto err_regs;
+                udc->debugfs_regs = regs;
+        }
 
         usba_ep_init_debugfs(udc, to_usba_ep(udc->gadget.ep0));