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path: root/drivers/net/xen-netback/xenbus.c
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Diffstat (limited to 'drivers/net/xen-netback/xenbus.c')
-rw-r--r--drivers/net/xen-netback/xenbus.c20
1 files changed, 10 insertions, 10 deletions
diff --git a/drivers/net/xen-netback/xenbus.c b/drivers/net/xen-netback/xenbus.c
index d2d7cd9145b1..a56d3eab35dd 100644
--- a/drivers/net/xen-netback/xenbus.c
+++ b/drivers/net/xen-netback/xenbus.c
@@ -495,26 +495,26 @@ static void backend_disconnect(struct backend_info *be)
struct xenvif *vif = be->vif;
if (vif) {
+ unsigned int num_queues = vif->num_queues;
unsigned int queue_index;
- struct xenvif_queue *queues;
xen_unregister_watchers(vif);
#ifdef CONFIG_DEBUG_FS
xenvif_debugfs_delif(vif);
#endif /* CONFIG_DEBUG_FS */
xenvif_disconnect_data(vif);
- for (queue_index = 0;
- queue_index < vif->num_queues;
- ++queue_index)
- xenvif_deinit_queue(&vif->queues[queue_index]);
- spin_lock(&vif->lock);
- queues = vif->queues;
+ /* At this point some of the handlers may still be active
+ * so we need to have additional synchronization here.
+ */
vif->num_queues = 0;
- vif->queues = NULL;
- spin_unlock(&vif->lock);
+ synchronize_net();
- vfree(queues);
+ for (queue_index = 0; queue_index < num_queues; ++queue_index)
+ xenvif_deinit_queue(&vif->queues[queue_index]);
+
+ vfree(vif->queues);
+ vif->queues = NULL;
xenvif_disconnect_ctrl(vif);
}