[PATCH net-next 02/10] netvsc: don't signal host twice if empty

[Stephen Hemminger]

When hv_pkt_iter_next() returns NULL, it has already called
hv_pkt_iter_close(). Calling it twice can lead to extra host signal.

Signed-off-by: Stephen Hemminger <sthem...@microsoft.com>
---
 drivers/net/hyperv/netvsc.c | 4 ----
 1 file changed, 4 deletions(-)

diff --git a/drivers/net/hyperv/netvsc.c b/drivers/net/hyperv/netvsc.c
index 208f03aa83de..c842265d1df9 100644
--- a/drivers/net/hyperv/netvsc.c
+++ b/drivers/net/hyperv/netvsc.c
@@ -1190,10 +1190,6 @@ int netvsc_poll(struct napi_struct *napi, int budget)
                nvchan->desc = hv_pkt_iter_next(channel, nvchan->desc);
        }
 
-       /* if ring is empty, signal host */
-       if (!nvchan->desc)
-               hv_pkt_iter_close(channel);
-
        /* If send of pending receive completions suceeded
         *   and did not exhaust NAPI budget this time
         *   and not doing busy poll
-- 
2.11.0