This is a note to let you know that I've just added the patch titled
iommu/vt-d: fix bug in handling multiple RMRRs for the same PCI device
to the 3.15-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
iommu-vt-d-fix-bug-in-handling-multiple-rmrrs-for-the-same-pci-device.patch
and it can be found in the queue-3.15 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 27e249501ca06a3010519c306206cc402b61b5ab Mon Sep 17 00:00:00 2001
From: Jiang Liu <jiang.liu@xxxxxxxxxxxxxxx>
Date: Fri, 20 Jun 2014 15:08:06 +0800
Subject: iommu/vt-d: fix bug in handling multiple RMRRs for the same PCI device
From: Jiang Liu <jiang.liu@xxxxxxxxxxxxxxx>
commit 27e249501ca06a3010519c306206cc402b61b5ab 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@xxxxxx>
Tested-by: Linda Knippers <linda.knippers@xxxxxx>
Signed-off-by: Jiang Liu <jiang.liu@xxxxxxxxxxxxxxx>
Signed-off-by: Joerg Roedel <jroedel@xxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/iommu/intel-iommu.c | 9 +++------
1 file changed, 3 insertions(+), 6 deletions(-)
--- a/drivers/iommu/intel-iommu.c
+++ b/drivers/iommu/intel-iommu.c
@@ -3799,14 +3799,11 @@ int dmar_iommu_notify_scope_dev(struct d
((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);
}
}
Patches currently in stable-queue which might be from jiang.liu@xxxxxxxxxxxxxxx are
queue-3.15/iommu-vt-d-fix-bug-in-handling-multiple-rmrrs-for-the-same-pci-device.patch
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