ceph: fix dir_lease_is_valid()

static int dir_lease_is_valid(struct inode *dir, struct dentry *dentry)

{

	struct ceph_inode_info *ci = ceph_inode(dir);

	struct ceph_dentry_info *di = ceph_dentry(dentry);

	int valid = 0;

	int valid;

	int shared_gen;

	spin_lock(&ci->i_ceph_lock);

	if (atomic_read(&ci->i_shared_gen) == di->lease_shared_gen)

	valid = __ceph_caps_issued_mask(ci, CEPH_CAP_FILE_SHARED, 1);

	shared_gen = atomic_read(&ci->i_shared_gen);

	spin_unlock(&ci->i_ceph_lock);

	if (valid)

	if (valid) {

		struct ceph_dentry_info *di;

		spin_lock(&dentry->d_lock);

		di = ceph_dentry(dentry);

		if (dir == d_inode(dentry->d_parent) &&

		    di && di->lease_shared_gen == shared_gen)

			__ceph_dentry_dir_lease_touch(di);

	dout("dir_lease_is_valid dir %p v%u dentry %p v%u = %d\n",

	     dir, (unsigned)atomic_read(&ci->i_shared_gen),

	     dentry, (unsigned)di->lease_shared_gen, valid);

		else

			valid = 0;

		spin_unlock(&dentry->d_lock);

	}

	dout("dir_lease_is_valid dir %p v%u dentry %p = %d\n",

	     dir, (unsigned)atomic_read(&ci->i_shared_gen), dentry, valid);

	return valid;

}