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@xxxxxxxxxxxxxxx> # 3.15 Reported-by: Tom Mingarelli <thomas.mingarelli@xxxxxx> Tested-by: Linda Knippers <linda.knippers@xxxxxx> Signed-off-by: Jiang Liu <jiang.liu@xxxxxxxxxxxxxxx> --- drivers/iommu/intel-iommu.c | 9 +++------ 1 file 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); } } -- 1.7.10.4 -- To unsubscribe from this list: send the line "unsubscribe linux-hotplug" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
