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intel-iommu: Yet another BIOS workaround: Isoch DMAR unit with no TLB space
authorDavid Woodhouse <David.Woodhouse@intel.com>
Wed, 30 Sep 2009 16:12:17 +0000 (09:12 -0700)
committerDavid Woodhouse <David.Woodhouse@intel.com>
Wed, 30 Sep 2009 16:12:17 +0000 (09:12 -0700)
commitf7032409a0e5e55dcab719363d0c55c17466e61b
tree32b6d394c47bd61e530fd322d473dd79c9b70db9tree | snapshot
parent290a28d54b2f4057c355b9349a122655d101dca4commit | diff
intel-iommu: Yet another BIOS workaround: Isoch DMAR unit with no TLB space

Asus decided to ship a BIOS which configures sound DMA to go via the
dedicated IOMMU unit, but assigns precisely zero TLB entries to that
unit. Which causes the whole thing to deadlock, including the DMA
traffic on the _other_ IOMMU units. Nice one.

Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
drivers/pci/intel-iommu.c diff | blob | history
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