Linux kernels 4.3+ mess up MPT2SAS configs

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Hi,

I've got an LSI MPT2SAS controller in my home system, great board,
running well.  When I try to use kernels newer than approximately
4.3.0, the default Kconfig entry goes away because of what looks like
a merge of the mpt2sas and mpt3sas drivers.

In my hand made 4.2.6 config I have:

   CONFIG_SCSI_MPT2SAS=m
   CONFIG_SCSI_MPT2SAS_MAX_SGE=128
   # CONFIG_SCSI_MPT2SAS_LOGGING is not set
   # CONFIG_SCSI_MPT3SAS is not set

But when I pull down the 4.4-rc3 release and do:

    make mrproper
    cp /boot/config-4.2.6 .config
    make oldconfig

I silently get my CONFIG_SCSI_MPT2SAS entry removed, and the
CONFIG_SCSI_MPT3SAS is still left unconfigured!  This is a pain when
you boot up and your home directory and other data files aren't
available...

    > grep MPT .config
    CONFIG_PREEMPT_NOTIFIERS=y
    # CONFIG_PREEMPT_NONE is not set
    CONFIG_PREEMPT_VOLUNTARY=y
    # CONFIG_PREEMPT is not set
    CONFIG_CB710_DEBUG_ASSUMPTIONS=y
    # CONFIG_SCSI_MPT3SAS is not set

Can we please get this fixed so that moving forward this is setup
properly?

Thanks,
John
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