xen-netback: move NAPI add/remove calls

Originally netif_napi_add was in xenvif_init_queue and netif_napi_del
was in xenvif_deinit_queue, while kthreads were handled in
xenvif_connect and xenvif_disconnect. Move netif_napi_add and
netif_napi_del to xenvif_connect and xenvif_disconnect so that they
reside together with kthread operations.

Signed-off-by: Wei Liu <wei.liu2@citrix.com>
Cc: Ian Campbell <ian.campbell@citrix.com>
Cc: Zoltan Kiss <zoltan.kiss@citrix.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 5 insertions, 4 deletions

diff --git a/drivers/net/xen-netback/interface.c b/drivers/net/xen-netback/interface.c
index bfd10cb9c8de..5f3d6c06fcf7 100644
--- a/drivers/net/xen-netback/interface.c
+++ b/drivers/net/xen-netback/interface.c
@@ -524,9 +524,6 @@ int xenvif_init_queue(struct xenvif_queue *queue)
 
         init_timer(&queue->rx_stalled);
 
-        netif_napi_add(queue->vif->dev, &queue->napi, xenvif_poll,
-                        XENVIF_NAPI_WEIGHT);
-
         return 0;
 }
 
@@ -614,6 +611,9 @@ int xenvif_connect(struct xenvif_queue *queue, unsigned long tx_ring_ref,
         wake_up_process(queue->task);
         wake_up_process(queue->dealloc_task);
 
+        netif_napi_add(queue->vif->dev, &queue->napi, xenvif_poll,
+                        XENVIF_NAPI_WEIGHT);
+
         return 0;
 
 err_rx_unbind:
@@ -672,6 +672,8 @@ void xenvif_disconnect(struct xenvif *vif)
         for (queue_index = 0; queue_index < num_queues; ++queue_index) {
                 queue = &vif->queues[queue_index];
 
+                netif_napi_del(&queue->napi);
+
                 if (queue->task) {
                         del_timer_sync(&queue->rx_stalled);
                         kthread_stop(queue->task);
@@ -704,7 +706,6 @@ void xenvif_disconnect(struct xenvif *vif)
 void xenvif_deinit_queue(struct xenvif_queue *queue)
 {
         free_xenballooned_pages(MAX_PENDING_REQS, queue->mmap_pages);
-        netif_napi_del(&queue->napi);
 }
 
 void xenvif_free(struct xenvif *vif)