MFI_OMSK
mfi_write(sc, MFI_OMSK, MFI_ENABLE_INTR);
mfi_write(sc, MFI_OMSK, ~0x80000004);
mfi_write(sc, MFI_OMSK, ~MFI_OSTS_GEN2_INTR_VALID);
mfi_write(sc, MFI_OMSK, ~0x00000001);
mfii_write(sc, MFI_OMSK, 0xffffffff);
mfii_write(sc, MFI_OMSK, ~MFII_OSTS_INTR_VALID);