From: Xue Chaojing <xuechaojing@huawei.com>
Date: Tue, 20 Nov 2018 05:47:34 +0000 (+0000)
Subject: net-next/hinic: fix a bug in rx data flow
X-Git-Tag: v4.19.89~182
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=f04eee4042ab74a240fb39daf0e089cf3cee35c5;p=thirdparty%2Fkernel%2Fstable.git

net-next/hinic: fix a bug in rx data flow

[ Upstream commit b1a200484143a727ce293e0f200a543cc7584152 ]

In rx_alloc_pkts(), there is a loop call of tasklet, which causes
100% cpu utilization, even no packets are being received. This patch
fixes this bug.

Signed-off-by: Xue Chaojing <xuechaojing@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---

diff --git a/drivers/net/ethernet/huawei/hinic/hinic_rx.c b/drivers/net/ethernet/huawei/hinic/hinic_rx.c
index 4c0f7eda1166c..06b24a92ed7d4 100644
--- a/drivers/net/ethernet/huawei/hinic/hinic_rx.c
+++ b/drivers/net/ethernet/huawei/hinic/hinic_rx.c
@@ -207,9 +207,9 @@ skb_out:
 		wmb();  /* write all the wqes before update PI */
 
 		hinic_rq_update(rxq->rq, prod_idx);
+		tasklet_schedule(&rxq->rx_task);
 	}
 
-	tasklet_schedule(&rxq->rx_task);
 	return i;
 }