Patch "iommu/vt-d: Really use upper context table when necessary" has been added to the 4.2-stable tree

This is a note to let you know that I've just added the patch titled

iommu/vt-d: Really use upper context table when necessary

to the 4.2-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-really-use-upper-context-table-when-necessary.patch
and it can be found in the queue-4.2 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let <[email protected]> know about it.

From: Joerg Roedel <[email protected]>
Date: Tue, 25 Aug 2015 10:54:28 +0200
Subject: iommu/vt-d: Really use upper context table when necessary

From: Joerg Roedel <[email protected]>

commit 4df4eab168c1c4058603be55a3169d4a45779cc0 upstream.

There is a bug in iommu_context_addr() which will always use the lower context table, even when the upper context table needs to be used. Fix this issue.

---
 drivers/iommu/intel-iommu.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

@@ -755,6 +755,7 @@ static inline struct context_entry *iomm
 	struct context_entry *context;
 	u64 *entry;
 
+	entry = &root->lo;
 	if (ecs_enabled(iommu)) {
 		if (devfn >= 0x80) {
 			devfn -= 0x80;

@@ -762,7 +763,6 @@ static inline struct context_entry *iomm
 		}
 		devfn *= 2;
 	}
-	entry = &root->lo;
 	if (*entry & 1)
 		context = phys_to_virt(*entry & VTD_PAGE_MASK);
 	else {

Patches currently in stable-queue which might be from [email protected] are

queue-4.2/iommu-vt-d-really-use-upper-context-table-when-necessary.patch queue-4.2/iommu-fsl-really-fix-init-section-s-content.patch queue-4.2/iommu-io-pgtable-arm-unmap-and-free-table-when-overwriting-with-block.patch