Update/more info
mpt2sas.msix_disable=1 (for 4.3 or older kernels)
or
mpt3sas.msix_disable=1 (for 4.4 or newer kernels)
Added to kernel boot line parameters, adding here as well for prosperity's sake.
Under ubuntu or CentOS using grub2 to make it stick edit the /etc/default/grub to the following:
GRUB_CMDLINE_LINUX_DEFAULT="mpt2sas.msix_disable=1"
(mpt3sas.msix_disable=1 for 4.4 or newer kernels)
Save file:
Then update grub2 files:
Ubuntu - update-grub
CentOS - grub2-mkconfig -o /boot/grub2/grub.cfg (BIOS based machines)
grub2-mkconfig -o /boot/efi/EFI/redhat/grub.cfg (UEFI based machines)