iget: stop UFS from using iget() and read_inode()

Stop the UFS filesystem from using iget() and read_inode().  Replace
ufs_read_inode() with ufs_iget(), and call that instead of iget().  ufs_iget()
then uses iget_locked() directly and returns a proper error code instead of an
inode in the event of an error.

ufs_fill_super() returns any error incurred when getting the root inode
instead of EINVAL.

[akpm@linux-foundation.org: coding-style fixes]
Signed-off-by: David Howells <dhowells@redhat.com>
Cc: Evgeniy Dushistov <dushistov@mail.ru>
Acked-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/fs/ufs/namei.c b/fs/ufs/namei.c
index d8bfbee..747a4de 100644
--- a/fs/ufs/namei.c
+++ b/fs/ufs/namei.c
@@ -57,10 +57,10 @@
 	lock_kernel();
 	ino = ufs_inode_by_name(dir, dentry);
 	if (ino) {
-		inode = iget(dir->i_sb, ino);
-		if (!inode) {
+		inode = ufs_iget(dir->i_sb, ino);
+		if (IS_ERR(inode)) {
 			unlock_kernel();
-			return ERR_PTR(-EACCES);
+			return ERR_CAST(inode);
 		}
 	}
 	unlock_kernel();