linux-kernel - [PATCH] net: caif: use DEV_STATS_INC() and DEV_STATS

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Date: Fri, 31 May 2024 16:38:40 +0800
From: Yunshui Jiang <jiangyunshui@...inos.cn>
To: linux-kernel@...r.kernel.org,
	netdev@...r.kernel.org
Cc: davem@...emloft.net,
	edumazet@...gle.com,
	kuba@...nel.org,
	pabeni@...hat.com,
	Yunshui Jiang <jiangyunshui@...inos.cn>
Subject: [PATCH] net: caif: use DEV_STATS_INC() and DEV_STATS_ADD()

CAIF devices update their dev->stats fields locklessly. Therefore
these counters should be updated atomically. Adopt SMP safe DEV_STATS_INC()
and DEV_STATS_ADD() to achieve this.

Signed-off-by: Yunshui Jiang <jiangyunshui@...inos.cn>
---
 net/caif/chnl_net.c | 16 ++++++++--------
 1 file changed, 8 insertions(+), 8 deletions(-)

diff --git a/net/caif/chnl_net.c b/net/caif/chnl_net.c
index 47901bd4def1..376f5abba88d 100644
--- a/net/caif/chnl_net.c
+++ b/net/caif/chnl_net.c
@@ -90,7 +90,7 @@ static int chnl_recv_cb(struct cflayer *layr, struct cfpkt *pkt)
 		break;
 	default:
 		kfree_skb(skb);
-		priv->netdev->stats.rx_errors++;
+		DEV_STATS_INC(priv->netdev, rx_errors);
 		return -EINVAL;
 	}
 
@@ -103,8 +103,8 @@ static int chnl_recv_cb(struct cflayer *layr, struct cfpkt *pkt)
 	netif_rx(skb);
 
 	/* Update statistics. */
-	priv->netdev->stats.rx_packets++;
-	priv->netdev->stats.rx_bytes += pktlen;
+	DEV_STATS_INC(priv->netdev, rx_packets);
+	DEV_STATS_ADD(priv->netdev, rx_bytes, pktlen);
 
 	return 0;
 }
@@ -206,14 +206,14 @@ static netdev_tx_t chnl_net_start_xmit(struct sk_buff *skb,
 	if (skb->len > priv->netdev->mtu) {
 		pr_warn("Size of skb exceeded MTU\n");
 		kfree_skb(skb);
-		dev->stats.tx_errors++;
+		DEV_STATS_INC(dev, tx_errors);
 		return NETDEV_TX_OK;
 	}
 
 	if (!priv->flowenabled) {
 		pr_debug("dropping packets flow off\n");
 		kfree_skb(skb);
-		dev->stats.tx_dropped++;
+		DEV_STATS_INC(dev, tx_dropped);
 		return NETDEV_TX_OK;
 	}
 
@@ -228,13 +228,13 @@ static netdev_tx_t chnl_net_start_xmit(struct sk_buff *skb,
 	/* Send the packet down the stack. */
 	result = priv->chnl.dn->transmit(priv->chnl.dn, pkt);
 	if (result) {
-		dev->stats.tx_dropped++;
+		DEV_STATS_INC(dev, tx_dropped);
 		return NETDEV_TX_OK;
 	}
 
 	/* Update statistics. */
-	dev->stats.tx_packets++;
-	dev->stats.tx_bytes += len;
+	DEV_STATS_INC(dev, tx_packets);
+	DEV_STATS_ADD(dev, tx_bytes, len);
 
 	return NETDEV_TX_OK;
 }
-- 
2.34.1