Hi, >On 2017-02-01 13:52, Lorenzo Pieralisi wrote: >> >> I debugged the issue and Nate's fix is correct, the fact that you >> can't it hit it with mainline is just a matter of timing because it has >> to do with the CTX pointer value (we OR it with the existing value), so >> it may work or not depending on how the cdptr memory allocation >> pattern turns out to be (which explains why Nate and I can hit it with >> simple PCI device remove/add execution too). >> >> So it is neither an ACPI nor an IOMMU probe deferral issue per-se, >> fix is already queued, so it is all good. >> >> What about USB stalls ? >Our fault. The USB controller was getting 48-bit IOVAs, but the >bus it sits on only supports 44-bits so the controller's DMA >transactions ended up targeting addresses that were never mapped. > >It started working once I applied the iort/dma-mapping patches I >sent out earlier this week that use the iort memory_address_limit >field to check if a dma_mask is sane. > >Sorry for the false alarm. Ok, thanks for closing on it. I will just post V8 with all acks picked up and Robin's fix , right away. Regards, Sricharan
