This is a note to let you know that I have just added a patch titled
xen/gnttab: leave lazy MMU mode in the case of a m2p override failure
to the linux-3.8.y-queue branch of the 3.8.y.z extended stable tree
which can be found at:
http://kernel.ubuntu.com/git?p=ubuntu/linux.git;a=shortlog;h=refs/heads/linux-3.8.y-queue
This patch is scheduled to be released in version 3.8.13.15.
If you, or anyone else, feels it should not be added to this tree, please
reply to this email.
For more information about the 3.8.y.z tree, see
https://wiki.ubuntu.com/Kernel/Dev/ExtendedStable
Thanks.
-Kamal
------
>From f8fab7bbd1aa39a684fb212cd8721e8896e779f4 Mon Sep 17 00:00:00 2001
From: Matt Wilson <[email protected]>
Date: Wed, 20 Nov 2013 12:11:35 -0800
Subject: xen/gnttab: leave lazy MMU mode in the case of a m2p override failure
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 <[email protected]>
Cc: Boris Ostrovsky <[email protected]>
Reviewed-by: David Vrabel <[email protected]>
Reviewed-by: Anthony Liguori <[email protected]>
Cc: [email protected]
Cc: [email protected]
Signed-off-by: Matt Wilson <[email protected]>
Signed-off-by: Konrad Rzeszutek Wilk <[email protected]>
Signed-off-by: Kamal Mostafa <[email protected]>
---
drivers/xen/grant-table.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/drivers/xen/grant-table.c b/drivers/xen/grant-table.c
index 51be226..b146bfd 100644
--- a/drivers/xen/grant-table.c
+++ b/drivers/xen/grant-table.c
@@ -920,9 +920,10 @@ int gnttab_map_refs(struct gnttab_map_grant_ref *map_ops,
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();
@@ -953,9 +954,10 @@ int gnttab_unmap_refs(struct gnttab_unmap_grant_ref
*unmap_ops,
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();
--
1.8.3.2
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
