diff options
| author | Igor Druzhinin <igor.druzhinin@citrix.com> | 2017-01-17 20:49:38 +0000 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-07-05 14:40:21 +0200 |
| commit | da805bc788b0dfce728b22d2595e569d2ee9769e (patch) | |
| tree | 002bd7d1d3df4a29c43e85b724e811079af253f7 /drivers/net/xen-netback/xenbus.c | |
| parent | 7bdccaa5da12f294636de312c73d7d33dfaa947c (diff) | |
xen-netback: protect resource cleaning on XenBus disconnect
[ Upstream commit f16f1df65f1cf139ff9e9f84661e6573d6bb27fc ]
vif->lock is used to protect statistics gathering agents from using the
queue structure during cleaning.
Signed-off-by: Igor Druzhinin <igor.druzhinin@citrix.com>
Acked-by: Wei Liu <wei.liu2@citrix.com>
Reviewed-by: Paul Durrant <paul.durrant@citrix.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/net/xen-netback/xenbus.c')
| -rw-r--r-- | drivers/net/xen-netback/xenbus.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/net/xen-netback/xenbus.c b/drivers/net/xen-netback/xenbus.c index abffdbded5f27..b44f37fff8903 100644 --- a/drivers/net/xen-netback/xenbus.c +++ b/drivers/net/xen-netback/xenbus.c @@ -503,9 +503,11 @@ static void backend_disconnect(struct backend_info *be) for (queue_index = 0; queue_index < be->vif->num_queues; ++queue_index) xenvif_deinit_queue(&be->vif->queues[queue_index]); + spin_lock(&be->vif->lock); vfree(be->vif->queues); be->vif->num_queues = 0; be->vif->queues = NULL; + spin_unlock(&be->vif->lock); xenvif_disconnect_ctrl(be->vif); } |