From d36d36ceac11e514f1c313ea6ca7568e2463b6f2 Mon Sep 17 00:00:00 2001 From: Salil Date: Fri, 18 Aug 2017 12:31:37 +0100 Subject: [PATCH] net: hns3: Fixes the missing u64_stats_fetch_begin_irq in 64-bit stats fetch This patch fixes the missing u64_stats_fetch_begin_irq() while trying to atomically do 64-bit RX/TX fetch. We did not get any error during test as our SoC is 64-bit so all of these seq/lock operations results in NOOP. As such, this seq lock supports has been added for the sake of completion if this code ever runs on 32-bit platform and we are trying to do 64-bit stats fetch. Fixes: 76ad4f0ee747 ("net: hns3: Add support of HNS3 Ethernet Driver for hip08 SoC") Reported-by: Dan Carpenter Signed-off-by: Salil Mehta Signed-off-by: David S. Miller --- drivers/net/ethernet/hisilicon/hns3/hns3pf/hns3_enet.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hns3_enet.c b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hns3_enet.c index 9589b7e..b12730a 100644 --- a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hns3_enet.c +++ b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hns3_enet.c @@ -1054,6 +1054,7 @@ hns3_nic_get_stats64(struct net_device *netdev, struct rtnl_link_stats64 *stats) /* fetch the tx stats */ ring = priv->ring_data[idx].ring; do { + start = u64_stats_fetch_begin_irq(&ring->syncp); tx_bytes += ring->stats.tx_bytes; tx_pkts += ring->stats.tx_pkts; } while (u64_stats_fetch_retry_irq(&ring->syncp, start)); @@ -1061,6 +1062,7 @@ hns3_nic_get_stats64(struct net_device *netdev, struct rtnl_link_stats64 *stats) /* fetch the rx stats */ ring = priv->ring_data[idx + queue_num].ring; do { + start = u64_stats_fetch_begin_irq(&ring->syncp); rx_bytes += ring->stats.rx_bytes; rx_pkts += ring->stats.rx_pkts; } while (u64_stats_fetch_retry_irq(&ring->syncp, start)); -- 2.7.4