[Xen-devel] [PATCH net 1/3] xen-netback: move NAPI add/remove calls

[Wei Liu <wei.liu2@xxxxxxxxxx>]

Originally napi_add was in init_queue and napi_del was in deinit_queue,
while kthreads were handled in _connect and _disconnect. Move napi_add
and napi_remove to _connect and _disconnect so that they reside togother
with kthread operations.

Signed-off-by: Wei Liu <wei.liu2@xxxxxxxxxx>
Cc: Ian Campbell <ian.campbell@xxxxxxxxxx>
Cc: Zoltan Kiss <zoltan.kill@xxxxxxxxxx>
---
 drivers/net/xen-netback/interface.c |   12 ++++++++----
 1 file changed, 8 insertions(+), 4 deletions(-)

diff --git a/drivers/net/xen-netback/interface.c 
b/drivers/net/xen-netback/interface.c
index 48a55cd..fdb4fca 100644
--- a/drivers/net/xen-netback/interface.c
+++ b/drivers/net/xen-netback/interface.c
@@ -528,9 +528,6 @@ 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;
 }
 
@@ -618,6 +615,9 @@ 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:
@@ -675,6 +675,11 @@ 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);
+       }
+
+       for (queue_index = 0; queue_index < num_queues; ++queue_index) {
+               queue = &vif->queues[queue_index];
 
                if (queue->task) {
                        del_timer_sync(&queue->rx_stalled);
@@ -708,7 +713,6 @@ 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)
-- 
1.7.10.4


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