cifs: don't ignore cifs_posix_open_inode_helper return value

...and ensure that we propagate the error back to avoid any surprises.

Signed-off-by: Suresh Jayaraman <sjayaraman@suse.de>
Reviewed-and-Tested-by: Jeff Layton <jlayton@redhat.com>
diff --git a/fs/cifs/file.c b/fs/cifs/file.c
index 5b9d1f2..02a2df9 100644
--- a/fs/cifs/file.c
+++ b/fs/cifs/file.c
@@ -277,8 +277,8 @@
 				goto out;
 			}
 
-			cifs_posix_open_inode_helper(inode, file, pCifsInode,
-						     oplock, netfid);
+			rc = cifs_posix_open_inode_helper(inode, file,
+					pCifsInode, oplock, netfid);
 			goto out;
 		} else if ((rc == -EINVAL) || (rc == -EOPNOTSUPP)) {
 			if (tcon->ses->serverNOS)