Comment 20 for bug 1810239

The same problem occurs on a Z68A-GD65 MSI G3 system Marvell 88SE91xx.

grep DMAR:

ACPI: DMAR beaff508 000B0 (v01 ALASKA A M I 00000001 INTL 00000001)
DMAR: Host address width 36
DMAR: DRHD base: 0x000000fed91000 flags: 0x1
DMAR: RMRR base: 0x000000bf4cc000 end: 0x000000bf4eefff
DMAR: No ATSR found
DMAR:[DMA Read] Request device [03:00.1] fault addr fffc0000
DMAR:[fault reason 02] Present bit in context entry is clear

grep IOMMU:

Intel-IOMMU: enabled
IOMMU 0: reg_base_addr fed91000 ver 1:0 cap c9008020660262 ecap f0105a
IOMMU 0 0xfed91000: using Queued invalidation
IOMMU: Setting RMRR:
IOMMU: Setting identity map for device 0000:00:1d.0 [0xbf4cc000 - 0xbf4eefff]
IOMMU: Setting identity map for device 0000:00:1a.0 [0xbf4cc000 - 0xbf4eefff]
IOMMU: Prepare 0-16MiB unity mapping for LPC
IOMMU: Setting identity map for device 0000:00:1f.0 [0x0 - 0xffffff]
Intel-IOMMU: enabled
IOMMU 0: reg_base_addr fed91000 ver 1:0 cap c9008020660262 ecap f0105a
IOMMU 0 0xfed91000: using Queued invalidation
IOMMU: Setting RMRR:
IOMMU: Setting identity map for device 0000:00:1d.0 [0xbf4cc000 - 0xbf4eefff]
IOMMU: Setting identity map for device 0000:00:1a.0 [0xbf4cc000 - 0xbf4eefff]
IOMMU: Prepare 0-16MiB unity mapping for LPC
IOMMU: Setting identity map for device 0000:00:1f.0 [0x0 - 0xffffff]

grep ata8:

ata8: SATA max UDMA/133 abar m2048@0xfa310000 port 0xfa310180 irq 48
ata8: SATA link up 6.0 Gbps (SStatus 133 SControl 300)
ata8.00: qc timeout (cmd 0xec)
ata8.00: failed to IDENTIFY (I/O error, err_mask=0x4)
ata8: SATA link up 6.0 Gbps (SStatus 133 SControl 300)
ata8.00: qc timeout (cmd 0xec)
ata8.00: failed to IDENTIFY (I/O error, err_mask=0x4)
ata8: limiting SATA link speed to 3.0 Gbps
ata8: SATA link up 6.0 Gbps (SStatus 133 SControl 320)
ata8.00: qc timeout (cmd 0xec)
ata8.00: failed to IDENTIFY (I/O error, err_mask=0x4)
ata8: SATA link up 6.0 Gbps (SStatus 133 SControl 320)