The mpt2sas driver was changed late last year in that it now requests a 64 bit DMA mask, then requests a 32 bit coherent DMA mask, then later requests a 64 bit coherent DMA mask. This was 5fb1bf8aaa832e1e9ca3198de7bbecb8eff7db9c. This breaks 64 bit DMA support for mpt2sas on Power and we always fall back to using 32 bit DMA. Looking at the commit log, it looks like this was an intentional change. Ben - you had a patch set you had posted to the list back in Feb of this year, but it doesn't look like it got merged. https://lists.ozlabs.org/pipermail/linuxppc-dev/2015-February/125087.html This would fix the issue I'm seeing on mpt2sas. Do you plan to dust that patch set off and upstream it? Were there issues with it that still need to be resolved? Thanks, Brian -- Brian King Power Linux I/O IBM Linux Technology Center -- To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
