The class action lawsuit is only for their 3.5" desktop drives and only a specific series as well. They don't use the same chipset in their laptop drives.
The problem with the 3.5" drives is related to controller chip failures. The supplier for the epoxy used to make the chip packages changed their formula without telling Cirrus Logic who actually manufacture the chips. Fujitsu bought the chips off Cirrus Logic and put them into the drives.

- Trevor