cciss driver panic in 2.5.70

My smart array controllers 5i and 532 have a panic by using 2.5.70(also include being patched kernel with bk*,mm*),the panic message is "VFS...Could not mount cciss/codop1 or unknown-block",but all is right under kernel 2.4.18,my linux is redhat8.0.cciss have included in the kernel, not a module.