This is a note to let you know that I've just added the patch titled
xen/gnttab: leave lazy MMU mode in the case of a m2p override failure
to the 3.12-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:
xen-gnttab-leave-lazy-mmu-mode-in-the-case-of-a-m2p-override-failure.patch
and it can be found in the queue-3.12 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 14883a75ec76b44759385fb12629f4a0f1aef4e3 Mon Sep 17 00:00:00 2001
From: Matt Wilson <msw@xxxxxxxxxx>
Date: Wed, 20 Nov 2013 12:11:35 -0800
Subject: xen/gnttab: leave lazy MMU mode in the case of a m2p override failure
From: Matt Wilson <msw@xxxxxxxxxx>
commit 14883a75ec76b44759385fb12629f4a0f1aef4e3 upstream.
Commit f62805f1 introduced a bug where lazy MMU mode isn't exited if a
m2p_add/remove_override call fails.
Acked-by: Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx>
Cc: Boris Ostrovsky <boris.ostrovsky@xxxxxxxxxx>
Reviewed-by: David Vrabel <david.vrabel@xxxxxxxxxx>
Reviewed-by: Anthony Liguori <aliguori@xxxxxxxxxx>
Signed-off-by: Matt Wilson <msw@xxxxxxxxxx>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/xen/grant-table.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
--- a/drivers/xen/grant-table.c
+++ b/drivers/xen/grant-table.c
@@ -921,9 +921,10 @@ int gnttab_map_refs(struct gnttab_map_gr
ret = m2p_add_override(mfn, pages[i], kmap_ops ?
&kmap_ops[i] : NULL);
if (ret)
- return ret;
+ goto out;
}
+ out:
if (lazy)
arch_leave_lazy_mmu_mode();
@@ -954,9 +955,10 @@ int gnttab_unmap_refs(struct gnttab_unma
ret = m2p_remove_override(pages[i], kmap_ops ?
&kmap_ops[i] : NULL);
if (ret)
- return ret;
+ goto out;
}
+ out:
if (lazy)
arch_leave_lazy_mmu_mode();
Patches currently in stable-queue which might be from msw@xxxxxxxxxx are
queue-3.12/xen-gnttab-leave-lazy-mmu-mode-in-the-case-of-a-m2p-override-failure.patch
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