[3.19.y-ckt stable] Patch "xen/scsiback: correct frontend counting" has been added to the 3.19.y-ckt tree
Kamal Mostafa
kamal at canonical.com
Wed Mar 9 00:24:09 UTC 2016
This is a note to let you know that I have just added a patch titled
xen/scsiback: correct frontend counting
to the linux-3.19.y-queue branch of the 3.19.y-ckt extended stable tree
which can be found at:
http://kernel.ubuntu.com/git/ubuntu/linux.git/log/?h=linux-3.19.y-queue
This patch is scheduled to be released in version 3.19.8-ckt16.
If you, or anyone else, feels it should not be added to this tree, please
reply to this email.
For more information about the 3.19.y-ckt tree, see
https://wiki.ubuntu.com/Kernel/Dev/ExtendedStable
Thanks.
-Kamal
---8<------------------------------------------------------------
>From fd5a4143c307161e26e7681e744b9414ecc453af Mon Sep 17 00:00:00 2001
From: Juergen Gross <jgross at suse.com>
Date: Mon, 8 Feb 2016 15:30:18 +0100
Subject: xen/scsiback: correct frontend counting
commit f285aa8db7cc4432c1a03f8b55ff34fe96317c11 upstream.
When adding a new frontend to xen-scsiback don't decrement the number
of active frontends in case of no error. Doing so results in a failure
when trying to remove the xen-pvscsi nexus even if no domain is using
it.
Signed-off-by: Juergen Gross <jgross at suse.com>
Reviewed-by: Boris Ostrovsky <boris.ostrovsky at oracle.com>
Signed-off-by: David Vrabel <david.vrabel at citrix.com>
Signed-off-by: Kamal Mostafa <kamal at canonical.com>
---
drivers/xen/xen-scsiback.c | 10 +++++-----
1 file changed, 5 insertions(+), 5 deletions(-)
diff --git a/drivers/xen/xen-scsiback.c b/drivers/xen/xen-scsiback.c
index 2d530c1..bb32b94 100644
--- a/drivers/xen/xen-scsiback.c
+++ b/drivers/xen/xen-scsiback.c
@@ -943,12 +943,12 @@ out:
spin_unlock_irqrestore(&info->v2p_lock, flags);
out_free:
- mutex_lock(&tpg->tv_tpg_mutex);
- tpg->tv_tpg_fe_count--;
- mutex_unlock(&tpg->tv_tpg_mutex);
-
- if (err)
+ if (err) {
+ mutex_lock(&tpg->tv_tpg_mutex);
+ tpg->tv_tpg_fe_count--;
+ mutex_unlock(&tpg->tv_tpg_mutex);
kfree(new);
+ }
return err;
}
--
2.7.0
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