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| author | Jiang Liu <jiang.liu@linux.intel.com> | 2014-06-20 15:08:06 +0800 |
|---|---|---|
| committer | Joerg Roedel <jroedel@suse.de> | 2014-06-20 14:18:04 +0200 |
| commit | 27e249501ca06a3010519c306206cc402b61b5ab (patch) | |
| tree | a0d56fa11342b6c75ec8d194aca76b0528fbfa71 | |
| parent | 7171511eaec5bf23fb06078f59784a3a0626b38f (diff) | |
| download | linux-27e249501ca06a3010519c306206cc402b61b5ab.tar.gz linux-27e249501ca06a3010519c306206cc402b61b5ab.tar.bz2 linux-27e249501ca06a3010519c306206cc402b61b5ab.zip | |
iommu/vt-d: fix bug in handling multiple RMRRs for the same PCI device
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
Cc: <stable@vger.kernel.org> # 3.15
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>
| -rw-r--r-- | drivers/iommu/intel-iommu.c | 9 |
1 files changed, 3 insertions, 6 deletions
diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c index 6bb32773c3ac..51b6b77dc3e5 100644 --- a/drivers/iommu/intel-iommu.c +++ b/drivers/iommu/intel-iommu.c @@ -3816,14 +3816,11 @@ int dmar_iommu_notify_scope_dev(struct dmar_pci_notify_info *info) ((void *)rmrr) + rmrr->header.length, rmrr->segment, rmrru->devices, rmrru->devices_cnt); - if (ret > 0) - break; - else if(ret < 0) + if(ret < 0) return ret; } else if (info->event == BUS_NOTIFY_DEL_DEVICE) { - if (dmar_remove_dev_scope(info, rmrr->segment, - rmrru->devices, rmrru->devices_cnt)) - break; + dmar_remove_dev_scope(info, rmrr->segment, + rmrru->devices, rmrru->devices_cnt); } } |