gfs2: Fix gfs2_qa_get imbalance in gfs2_quota_hold

This patch fixes a case in which function gfs2_quota_hold encounters an
assert error and exits. The lack of gfs2_qa_put causes further problems
when the inode is evicted and the get/put count is non-zero.
Signed-off-by: Bob Peterson <rpeterso@redhat.com>
Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>

fs/gfs2/quota.c

@@ -591,6 +591,7 @@ int gfs2_quota_hold(struct gfs2_inode *ip, kuid_t uid, kgid_t gid)
 	if (gfs2_assert_warn(sdp, !ip->i_qadata->qa_qd_num) ||
 	    gfs2_assert_warn(sdp, !test_bit(GIF_QD_LOCKED, &ip->i_flags))) {
 		error = -EIO;
+		gfs2_qa_put(ip);
 		goto out;
 	}