On Fri, 2014-09-05 at 20:00 -0700, Jason Newton wrote: > Hi, > > I have an AR9462 connected over minipcie, it came with the ASRock > FM2A88x-itx motherboard and I'm using an AMD A10-7850K cpu with it. When I > have IOMMU enabled, and this is desirable for opencl related things, the > AR9462 malfunctions with these two errors occurring: > > AMD-Vi: Event logged [INVALID_DEVICE_REQUEST device=00:00.1 > address=0x000000fdf8080020 flags=0x0a00] > > Followed by this looping error, which reoccurs shortly after associating > and obtaining an IP. I've attached a large snippet from dmesg, due to it's > length. > > I'm not sure where the error is coming from but I did see that Alex > Williamson posted a patch that dealt with aliased devices (like pci > bridges) and AMD's IOMMU issues, see > e028a9e6b8a637af09ac4114083280df4a7045f1 for reference. > > I then disable IOMMU in the bios, and immediately the ath9k/AR9462 pair is > working without flaw or retries. Bios is up to date btw, updated it after > building the machine last friday. > > So anyone have a clue what's going on here?
Please boot with "amd_iommu_dump" on the kernel boot line and send the full dmesg log and 'sudo lspci -vvv' output. Thanks, Alex _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu
