From: stephen hemminger <stephen@networkplumber.org>
Date: Wed, 9 Aug 2017 17:46:04 -0700
Patch-mainline: v4.14-rc1
Subject: netvsc: don't signal host twice if empty
Git-commit: 5e20d55a23a76a876396ba1235bdf019e74d0c6f
References: fate#323887
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 <sthemmin@microsoft.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Acked-by: Olaf Hering <ohering@suse.de>
---
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
--- a/drivers/net/hyperv/netvsc.c
+++ b/drivers/net/hyperv/netvsc.c
@@ -1191,10 +1191,6 @@ 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