This is a note to let you know that I've just added the patch titled
[PATCH 038/135] drivers/hv: cleanup synic msrs if vmbus connect
to the 4.4-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:
0038-drivers-hv-cleanup-synic-msrs-if-vmbus-connect-faile.patch
and it can be found in the queue-4.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From b43e0d6819e7723e5b43da02b039eb6d62970f1f Mon Sep 17 00:00:00 2001
From: Andrey Smetanin <asmetanin@xxxxxxxxxxxxx>
Date: Mon, 14 Dec 2015 16:01:38 -0800
Subject: [PATCH 038/135] drivers/hv: cleanup synic msrs if vmbus connect
failed
[ Upstream commit 17efbee8ba02ef00d3b270998978f8a1a90f1d92 ]
Before vmbus_connect() synic is setup per vcpu - this means
hypervisor receives writes at synic msr's and probably allocate
hypervisor resources per synic setup.
If vmbus_connect() failed for some reason it's neccessary to cleanup
synic setup by call hv_synic_cleanup() at each vcpu to get a chance
to free allocated resources by hypervisor per synic.
This patch does appropriate cleanup in case of vmbus_connect() failure.
Signed-off-by: Andrey Smetanin <asmetanin@xxxxxxxxxxxxx>
Signed-off-by: Denis V. Lunev <den@xxxxxxxxxx>
Reviewed-by: Vitaly Kuznetsov <vkuznets@xxxxxxxxxx>
CC: "K. Y. Srinivasan" <kys@xxxxxxxxxxxxx>
CC: Haiyang Zhang <haiyangz@xxxxxxxxxxxxx>
CC: Vitaly Kuznetsov <vkuznets@xxxxxxxxxx>
Signed-off-by: K. Y. Srinivasan <kys@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <alexander.levin@xxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/hv/vmbus_drv.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
--- a/drivers/hv/vmbus_drv.c
+++ b/drivers/hv/vmbus_drv.c
@@ -870,7 +870,7 @@ static int vmbus_bus_init(int irq)
on_each_cpu(hv_synic_init, NULL, 1);
ret = vmbus_connect();
if (ret)
- goto err_alloc;
+ goto err_connect;
if (vmbus_proto_version > VERSION_WIN7)
cpu_hotplug_disable();
@@ -888,6 +888,8 @@ static int vmbus_bus_init(int irq)
return 0;
+err_connect:
+ on_each_cpu(hv_synic_cleanup, NULL, 1);
err_alloc:
hv_synic_free();
hv_remove_vmbus_irq();
Patches currently in stable-queue which might be from asmetanin@xxxxxxxxxxxxx are
queue-4.4/0038-drivers-hv-cleanup-synic-msrs-if-vmbus-connect-faile.patch
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