This bug has been copied from bug #517893 and has been proposed
to be backported to 5.4 z-stream (EUS).
An advisory has been issued which should help the problem
described in this bug report. This report is therefore being
closed with a resolution of ERRATA. For more information
on therefore solution and/or where to find the updated files,
please follow the link below. You may reopen this bug report
if the solution does not work for you.
On PowerPC platforms an additional step is required to realize the full effect of this qlge driver fix. The qla2xxx driver must be configured to use MSI-X interrupts instead of default INTA interrupts.
Configure the qla2xxx driver to load with ql2xenablemsix=1 by adding an options line for qla2xxx to /etc/modprobe.conf or appending this option to an already existing options qa2xxx line.
options qla2xxx ql2xenablemsix=1
After making this change to /etc/modprobe.conf a new initrd must be built as qla2xxx driver loads at boot.
See Red Hat documentation for how to build new initrd.