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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)
commite0fc7e0b4b5e69616f10a894ab9afff3c64be74e
tree32b6d394c47bd61e530fd322d473dd79c9b70db9tree | snapshot
parent17b6097753e926ca546189463070a7e94e7ea9facommit | 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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