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Message-Id: <20170906205306.10541-3-sthemmin@microsoft.com> Date: Wed, 6 Sep 2017 13:53:06 -0700 From: Stephen Hemminger <stephen@...workplumber.org> To: kys@...rosoft.com, haiyangz@...rosoft.com, sthemmin@...rosoft.com Cc: devel@...uxdriverproject.org, netdev@...r.kernel.org Subject: [PATCH v2 net-next 2/2] hv_netvsc: avoid unnecessary wakeups on subchannel creation Only need to wakeup the initiator after all sub-channels are opened. Signed-off-by: Stephen Hemminger <sthemmin@...rosoft.com> --- drivers/net/hyperv/rndis_filter.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/net/hyperv/rndis_filter.c b/drivers/net/hyperv/rndis_filter.c index 731bc7cc6f43..065b204d8e17 100644 --- a/drivers/net/hyperv/rndis_filter.c +++ b/drivers/net/hyperv/rndis_filter.c @@ -1048,8 +1048,8 @@ static void netvsc_sc_open(struct vmbus_channel *new_sc) else netdev_notice(ndev, "sub channel open failed: %d\n", ret); - atomic_inc(&nvscdev->open_chn); - wake_up(&nvscdev->subchan_open); + if (atomic_inc_return(&nvscdev->open_chn) == nvscdev->num_chn) + wake_up(&nvscdev->subchan_open); } /* Open sub-channels after completing the handling of the device probe. -- 2.11.0
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