iommu/vt-d: fix bug in handling multiple RMRRs for the same PCI device

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commit 27e249501c upstream.

Function dmar_iommu_notify_scope_dev() makes a wrong assumption that
there's one RMRR for each PCI device at most, which causes DMA failure
on some HP platforms. So enhance dmar_iommu_notify_scope_dev() to
handle multiple RMRRs for the same PCI device.

Fixbug: https://bugzilla.novell.com/show_bug.cgi?id=879482

Reported-by: Tom Mingarelli <thomas.mingarelli@hp.com>
Tested-by: Linda Knippers <linda.knippers@hp.com>
Signed-off-by: Jiang Liu <jiang.liu@linux.intel.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

...

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Jiang Liu 2014-06-20 15:08:06 +08:00 • committed by Greg Kroah-Hartman

parent a17044baf1

commit 4577406902

1 changed files with 3 additions and 6 deletions

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drivers/iommu/intel-iommu.c

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