Mellanox feature/bug tracker for RHEL5.6.
I assume there are no driver updates planned for RHEL5.6.
If there are, you need to open bugzillas with the patches backported to the most recent 2.6.18 kernel, have them accepted upstream, and reviewed and approved by Red Hat prior to 8/13 to be considered for RHEL5.6.
If you have driver updates, add the bugzilla numbers to the field "This bug depends on" in this bugzilla and send me an email.
Snapshot as features for 5.6 are now closed:
* 563567 [ASSIGNED] [5.6 FEAT] Update the mlx4 driver for supporting
the Mellanox ConnectX QDR Infiniband card